Open Element Filter vs. Stock Air Filter???
03-03-2010, 08:50 PM
#51
Junior Member
Join Date: Jan 2010
Location: maryland
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Re: Open Element Filter vs. Stock Air Filter???
where did you put the vaccum line? i have a 89 firebird 305 i wanted to do the same thing i bought the car without the air cleaner. i will post some pics of it soon
03-31-2010, 08:59 PM
#53
Supreme Member
Join Date: Dec 2005
Location: Texas City, Texas Area
Posts: 1,244
Likes: 0
Received 1 Like
on
1 Post
Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: Open Element Filter vs. Stock Air Filter???
Thought id share my experience on this one with everyone. I purchased a 1991 RS TBI 5.0 Camaro. It had the factory air cleaner setup on it when i got the car. about a month after having the Camaro i purchased a genearic open element air cleaner for it. I want to say it was 28.99 or something close to that and a 12 dollar filter. it was a 3" tall filter. Right of the bat i noticed a defnitly increase in accelration. When the motor was cold it would preform great. Only draw back to this that i did notice is once the motr was hot, If i punched the gas, the trans would kick down like it should, and the motor would bog down a slight bit before wanting to take off. That seemd to be the draw back of the open element. Even with that draw back it did seem to be an improvement over the factory setup. Now last week i took it a step further, and installed the TPI "Y" air cleaner box and ran it into the TBI. This has not changed the off the line take off that i can notice. It still seems to accelrate about the same but it did 100% fix the problem with the motor boging down when you punched it hard. It compleatly got rid of the prblem for me. now when you punch it, the trans down shifts, and motor instantly starts pushing harder, no hessistation any more. cant say wither or not i'm getting more power, but its just a bit better preformace with the elimitation of the hessistation. it did cost about 100 bucks to do it all. not sure it was entirely worth it but now on the high way or even at lower speeds the motor responds alot faster to the demand of heavy or wide open throttle.
Parts used,
Stock Z28 TPI "Y" airbox with daul filters. 30.00 form parts car
one 11 inch long peace of 3 inch dia. PVC. 2.99 from Lowes.
one 3 in to 3 in PVC tubing conector ( rubbe sleev with 2 clamps built on it) 5.00 from Lowes.
I had to use a 4inch to 3 inch reducer boot to mate up the PVC tubing to the Bonnet inlet. one 4 inch to 3 inch rubber reducer with 2 clamps included 12.00 at Pep boys.
1 TBI/Carb bonnet. It has a 4 inch inlet opening. simple and easey to install. 58.99 from Pep boys. Installs in the same mannor as a open element or factory air cleaner. To use the facotry thread rod and wing nut, simply remove the spacer ring the factory air cleaner sits on. takes about 10 to 20 secodns to install.
Two facotry air filters for any 85-92 Z28. about 5.00 to 6.00 dollars each for fram or STP brand filters at most auto parts stores.
just over 100 bucks.
The PVC is a tempory solution. I'm most likely going to go to the exaust shop and get a peace of 3 inch dia. tubing to use and wrap it with exaust manifold thermal wrap as the perment solution. so far using the PVC its not flexing or cracked as far as i can see. the system works great, and it eliminated the Very LOUD sucking noise that is heard when at Wide open throttle with the open element style. It took me about an hour to install this because i have a 84 Z28 hood, as they did not use the "Y" filter box until 85, i had to cut out notches in my hood. Any factory RS or Z28 hood is made to fit the Z28 air box even ifit dint come with it factory as long as your car or hood was made 85 or newer, I think.. I konw my old stock 91 RS hood had the factory notches in the bracing for it. If not for having to cut out some bracing on my old 84 hood, the instal would have only taken about 20 minutes. Just thought i'd throw this out there.
-Randy-
Parts used,
Stock Z28 TPI "Y" airbox with daul filters. 30.00 form parts car
one 11 inch long peace of 3 inch dia. PVC. 2.99 from Lowes.
one 3 in to 3 in PVC tubing conector ( rubbe sleev with 2 clamps built on it) 5.00 from Lowes.
I had to use a 4inch to 3 inch reducer boot to mate up the PVC tubing to the Bonnet inlet. one 4 inch to 3 inch rubber reducer with 2 clamps included 12.00 at Pep boys.
1 TBI/Carb bonnet. It has a 4 inch inlet opening. simple and easey to install. 58.99 from Pep boys. Installs in the same mannor as a open element or factory air cleaner. To use the facotry thread rod and wing nut, simply remove the spacer ring the factory air cleaner sits on. takes about 10 to 20 secodns to install.
Two facotry air filters for any 85-92 Z28. about 5.00 to 6.00 dollars each for fram or STP brand filters at most auto parts stores.
just over 100 bucks.
The PVC is a tempory solution. I'm most likely going to go to the exaust shop and get a peace of 3 inch dia. tubing to use and wrap it with exaust manifold thermal wrap as the perment solution. so far using the PVC its not flexing or cracked as far as i can see. the system works great, and it eliminated the Very LOUD sucking noise that is heard when at Wide open throttle with the open element style. It took me about an hour to install this because i have a 84 Z28 hood, as they did not use the "Y" filter box until 85, i had to cut out notches in my hood. Any factory RS or Z28 hood is made to fit the Z28 air box even ifit dint come with it factory as long as your car or hood was made 85 or newer, I think.. I konw my old stock 91 RS hood had the factory notches in the bracing for it. If not for having to cut out some bracing on my old 84 hood, the instal would have only taken about 20 minutes. Just thought i'd throw this out there.
-Randy-
Did you ever post those part numbers??? Looks good...I might change my setup...
04-10-2010, 08:28 PM
#54
Junior Member
Join Date: Apr 2010
Location: Albany, New York
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991 Camaro RS
Engine: 305 TBI
Transmission: 5 Speed Manual
Axle/Gears: 3.73
Re: Open Element Filter vs. Stock Air Filter???
Is that the Mr. Gasket model #1480 air cleaner? Did the stock PCV breather hose hook right up to the air cleaner?
05-14-2010, 12:18 AM
#55
Supreme Member
iTrader: (3)
Join Date: Jul 2009
Location: Chicago, IL
Posts: 1,311
Likes: 0
Received 3 Likes
on
3 Posts
Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW
Re: Open Element Filter vs. Stock Air Filter???
I plan to get a non-drop model and try it again.
05-14-2010, 02:10 AM
#56
Supreme Member
Join Date: Apr 2006
Location: Northern, CA
Posts: 4,482
Likes: 0
Received 8 Likes
on
8 Posts
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Open Element Filter vs. Stock Air Filter???
This works for me. Drop base , 1/2in. spacer, 14in. x 3in. filter and Summit x-stream top (Power Lid)with cowl hood.The top photo also shows the PCV breather/filter on the valve cover eliminating the PCV pipe that led from there into the stock filter housing.
Last edited by Ron U.S.M.C.; 06-14-2013 at 10:46 PM. Reason: add a photo
06-08-2010, 10:21 PM
#57
Member
Join Date: Jul 2008
Posts: 177
Likes: 0
Received 0 Likes
on
0 Posts
Re: Open Element Filter vs. Stock Air Filter???
I'm doing the same idea as Randy111 but doing a custom airbox out of aluminum like: http://www.hawksthirdgenparts.com/ca...mairboxes.aspx
I already have the IAT sensor figured out but when I unplug my vacuum line from the TBI air box it makes my engine rev up a little. Should I just plug it up or put the part that came on the TBI sensor on it? Any ideas? I don't want to ruin the engine.
Handforming the aluminum seems to take the most time. For the connecting tube I used a two piece heater tube. I cut out the inside piece and then coated the outside with paint. It's galvanized steel too. I bet it will work fine. I will post the results when I'm done.
I already have the IAT sensor figured out but when I unplug my vacuum line from the TBI air box it makes my engine rev up a little. Should I just plug it up or put the part that came on the TBI sensor on it? Any ideas? I don't want to ruin the engine.
Handforming the aluminum seems to take the most time. For the connecting tube I used a two piece heater tube. I cut out the inside piece and then coated the outside with paint. It's galvanized steel too. I bet it will work fine. I will post the results when I'm done.
06-09-2010, 02:33 AM
#58
Supreme Member
iTrader: (3)
Join Date: Jul 2009
Location: Chicago, IL
Posts: 1,311
Likes: 0
Received 3 Likes
on
3 Posts
Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW
Re: Open Element Filter vs. Stock Air Filter???
I'm doing the same idea as Randy111 but doing a custom airbox out of aluminum like: http://www.hawksthirdgenparts.com/ca...mairboxes.aspx
I already have the IAT sensor figured out but when I unplug my vacuum line from the TBI air box it makes my engine rev up a little. Should I just plug it up or put the part that came on the TBI sensor on it? Any ideas? I don't want to ruin the engine.
Handforming the aluminum seems to take the most time. For the connecting tube I used a two piece heater tube. I cut out the inside piece and then coated the outside with paint. It's galvanized steel too. I bet it will work fine. I will post the results when I'm done.
I already have the IAT sensor figured out but when I unplug my vacuum line from the TBI air box it makes my engine rev up a little. Should I just plug it up or put the part that came on the TBI sensor on it? Any ideas? I don't want to ruin the engine.
Handforming the aluminum seems to take the most time. For the connecting tube I used a two piece heater tube. I cut out the inside piece and then coated the outside with paint. It's galvanized steel too. I bet it will work fine. I will post the results when I'm done.
@Ronus, I had nothing but problems with my Edelbrock 1221. It would cause my throttle to get stuck at Wot. I might reinstall it soon since I want to add a spacer for the tb now that I have the clearance with my daytona hood. That should eliminate the rubbing on the lines it rubs and probably causing the problem.
06-09-2010, 06:14 AM
#59
Supreme Member
Join Date: Jul 2006
Location: Windsor Ontario
Posts: 1,674
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1987 Firebird Formula
Engine: 2004 LQ4
Transmission: T-5 WC
Axle/Gears: 3.42
Re: Open Element Filter vs. Stock Air Filter???
The first thing I did when I bought my car was ditch that air cleaner, I put it on once when I was getting pictures taken for new insurance, it was horrible..
I also have a turbo bump hood with the vent opened up, as well as no rear hood seal.. So cooler air has to be coming in somewhere..
I also have a turbo bump hood with the vent opened up, as well as no rear hood seal.. So cooler air has to be coming in somewhere..
06-09-2010, 10:54 AM
#60
Member
Join Date: Jul 2008
Posts: 177
Likes: 0
Received 0 Likes
on
0 Posts
Re: Open Element Filter vs. Stock Air Filter???
Oh and that Carb/TBI plenum is from Spectre Performance. You can get it at Autozone, O'Reilly, etc.
The chrome version of the single four inch inlet is part number SPT 9849.
The Black polished version is SPT 9841.
Red - SPT 9842
Red Crinkle - SPT 9845
And there are double inlet versions of those too. Plus dual inlet blue, black crinkle, and chrome crinkle.
Go to http://www.spectreperformance.com/#CATALOG
Click on Air intake components
Go to the very last one and click on Plenums
There you will find a huge list. Just take the number and add "SPT" to the front of it. Then take that to your local parts store. Good luck.
The chrome version of the single four inch inlet is part number SPT 9849.
The Black polished version is SPT 9841.
Red - SPT 9842
Red Crinkle - SPT 9845
And there are double inlet versions of those too. Plus dual inlet blue, black crinkle, and chrome crinkle.
Go to http://www.spectreperformance.com/#CATALOG
Click on Air intake components
Go to the very last one and click on Plenums
There you will find a huge list. Just take the number and add "SPT" to the front of it. Then take that to your local parts store. Good luck.
06-09-2010, 01:51 PM
#61
Member
Join Date: Jul 2008
Posts: 177
Likes: 0
Received 0 Likes
on
0 Posts
Re: Open Element Filter vs. Stock Air Filter???
That is pretty cool, as for the plug, Check Autozone, they have a big kit of about 5-6 size plugs for around $7. Here is a set from Jegs.
06-18-2010, 03:14 PM
#62
Junior Member
iTrader: (1)
Join Date: Jun 2010
Location: Peoria, IL
Posts: 80
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1992 Firebird
Engine: LO3 305
Transmission: 5 speed
Axle/Gears: 3.08 limited slip
Re: Open Element Filter vs. Stock Air Filter???
I read this thread and decided what the heck and i did it. took me like 20 to 30 minutes to do this. I bought the Mr. Gasket 14" cleaner and it is a direct replacement. i bought it from advance auto parts. i was amazed how easy this was to install. i also bought a cheapo air breather that i bolted to the tube right where the old air cleaner connected to it. i even used the large rubber connector too. i put a screw in the vaccumm line and wrapped with with electrical tape. i also put my AIT sensor (which wasnt hooked up anywhere?? hmm) in the exact same spot as 885speed did. the mr gasket air cleaner even worked with the stock stud.
i took it out (after double and triple chaecking that everything was kosher under the hood) and OMG!!!!! this is awesome!!! if you dont do this then youre nuts. $40 for the end result is WELL WORTH IT! it sounds awesome. the sucking air and even the flowmaster sounds sweeter! the throttle response is so much better as well and i noticed a bit more power to. prolly not much on the dyno but you can feel it in the butt dyno for sure! having a manual tranny doesnt hurt either..lol
bottom line....cheap..easy..looks better..sounds better...feels better! any ?'s
i took it out (after double and triple chaecking that everything was kosher under the hood) and OMG!!!!! this is awesome!!! if you dont do this then youre nuts. $40 for the end result is WELL WORTH IT! it sounds awesome. the sucking air and even the flowmaster sounds sweeter! the throttle response is so much better as well and i noticed a bit more power to. prolly not much on the dyno but you can feel it in the butt dyno for sure! having a manual tranny doesnt hurt either..lol
bottom line....cheap..easy..looks better..sounds better...feels better! any ?'s
06-21-2010, 10:42 PM
#63
Supreme Member
iTrader: (3)
Join Date: Jul 2009
Location: Chicago, IL
Posts: 1,311
Likes: 0
Received 3 Likes
on
3 Posts
Car: 1986 Pontiac Firebird
Engine: 97 LT1 W/ Alot of goodies.
Transmission: 4L60E W/ Yank SS3600
Axle/Gears: 3.27 9 Bolt BW
Re: Open Element Filter vs. Stock Air Filter???
Well I decided to try it again but with a non drop base. With my Edelbrock 1221 I had linkage issues and had my throttle sticking a few times which is a major no no for me. This time I went with a JEGS Center base 50025, Which is a 14x4. Which should work nicely with daytona hood.
I should of done a bit more research instead of just going out and not checking for what clearance the cleaner needs to have. I will post pictures when it arrives probably on Thurs-Friday.
I should of done a bit more research instead of just going out and not checking for what clearance the cleaner needs to have. I will post pictures when it arrives probably on Thurs-Friday.
06-21-2010, 11:27 PM
#64
Supreme Member
Join Date: Apr 2006
Location: Northern, CA
Posts: 4,482
Likes: 0
Received 8 Likes
on
8 Posts
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Open Element Filter vs. Stock Air Filter???
Say Carlos773. Thats a really nice setup you bought from Jegs. Like the looks of that allot.Let us know how it works for you. Maybe some photos. I had to use a 1/2in spacer with the drop bottom to clear the linkage and the coil. Even then its close.
Last edited by Ron U.S.M.C.; 06-21-2010 at 11:40 PM. Reason: add info.
01-23-2011, 01:27 PM
#65
Junior Member
Join Date: Jun 2009
Location: Panama City, FL
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Car: '91 RS Coupe
Engine: 305
Transmission: Auto
Re: Open Element Filter vs. Stock Air Filter???
I'd like to echo my thanks as well for all the tips I've gleaned from the Thirdgen members. Spent the last few months replacing my heater core behind work and school. Will finally get her on the road today! My 305 TBI has done very well with 317,000 + miles on her. FYI - been using Walmart's Supertech 5w30 oil in her for years with no problems. Thanks all!
01-25-2011, 10:10 PM
#66
Supreme Member
Join Date: Apr 2006
Location: Northern, CA
Posts: 4,482
Likes: 0
Received 8 Likes
on
8 Posts
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Open Element Filter vs. Stock Air Filter???
You guys probably already know this but as far as the PCV hole on the valve cover I run one of these.Mine dose "not" have the hose. It simply is a filter breathing through holes in the bottom.Nice if you want to do away with the large hose when you install a new open element. Also I found this while surfing. I found it interesting. = The idea is for the PCV system to create a slight vacuum inside the engine which causes fresh air to be pulled into via the breather. Blow-by and moisture are pulled out of the crankcase through the PCV valve and burned.All the new cap is doing is eliminating the hose so you can install the element.
Last edited by Ron U.S.M.C.; 11-02-2012 at 01:52 AM. Reason: add info.
01-25-2011, 11:17 PM
#67
Supreme Member
iTrader: (25)
Join Date: Feb 2006
Location: Manteca,California. Nor Cal.
Posts: 7,260
Likes: 0
Received 5 Likes
on
5 Posts
Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: Open Element Filter vs. Stock Air Filter???
you running a carburetor on your L03 or is that a different car?
01-26-2011, 12:16 AM
#68
Supreme Member
Join Date: Apr 2006
Location: Northern, CA
Posts: 4,482
Likes: 0
Received 8 Likes
on
8 Posts
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Open Element Filter vs. Stock Air Filter???
No that's not mine. I'm TBI. Found the photo on line while doing a search.
01-26-2011, 09:16 AM
#69
01-27-2011, 05:59 AM
#70
Supreme Member
Join Date: Jun 2006
Location: West-Central
Posts: 2,199
Likes: 0
Received 1 Like
on
1 Post
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: Open Element Filter vs. Stock Air Filter???
Nice
Last edited by thomas1976; 12-18-2014 at 05:17 PM. Reason: bs
01-27-2011, 08:08 AM
#71
Supreme Member
iTrader: (25)
Join Date: Feb 2006
Location: Manteca,California. Nor Cal.
Posts: 7,260
Likes: 0
Received 5 Likes
on
5 Posts
Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: Open Element Filter vs. Stock Air Filter???
Yeah. But that setup he showed is common practice. Id rather have the headers pull out the crankcase pressure which is commmon practice also. A setup ont he valve cover like that with check valves on the headers with a hose going down to them. But with that setup if you have the baffle? under the hole for the breather. combined with the filter in that breaether you'll have very little oil intake, unless you have a lot of blowby
03-01-2011, 09:59 PM
#72
Junior Member
Join Date: Jun 2009
Location: Panama City, FL
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Car: '91 RS Coupe
Engine: 305
Transmission: Auto
Re: Open Element Filter vs. Stock Air Filter???
Speaking of breathers, I'm trying to swap out the factory breather that connected to the factory air cleaner housing, for a stand alone Edelbrock. Does the OEM breather pull out from the valve cover?? Tried to but it didn't budge. Am wondering if I have to remove the valve cover?? Thanks!
03-01-2011, 10:04 PM
#73
Supreme Member
iTrader: (25)
Join Date: Feb 2006
Location: Manteca,California. Nor Cal.
Posts: 7,260
Likes: 0
Received 5 Likes
on
5 Posts
Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: Open Element Filter vs. Stock Air Filter???
TBI's have a PCV valve on the drivers side cover which comes out easily. On the passenger side thier is a tube shaped to an L with a piece of hose that goes to the crankcase breather inside the air cleaner housing. It should pull right out. Spray some WD-40 on it to loosen her up some.
03-04-2011, 06:20 PM
#74
Junior Member
Join Date: Jun 2009
Location: Panama City, FL
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
Car: '91 RS Coupe
Engine: 305
Transmission: Auto
Re: Open Element Filter vs. Stock Air Filter???
Thomas1976, I noticed in your profile that you're in Switzerland. Is that the Florida town or the country?
03-04-2011, 09:10 PM
#77
Member
iTrader: (10)
Join Date: Dec 2010
Location: nc
Posts: 335
Likes: 0
Received 0 Likes
on
0 Posts
Car: 92 firebird
Engine: 305 tpi "stock"
Transmission: slipping
Axle/Gears: 3.42 posi disk brakes!
Re: Open Element Filter vs. Stock Air Filter???
lol i also started one of these threads and both really helpfull !!!!!!
those mr gaskets look nice and with a set of some nice valve covers look amazing thanks everyone for feedback now to convince my dad!
those mr gaskets look nice and with a set of some nice valve covers look amazing thanks everyone for feedback now to convince my dad!
03-05-2011, 03:02 AM
#78
Senior Member
Join Date: Mar 2009
Location: 47798 Germany
Posts: 505
Likes: 0
Received 0 Likes
on
0 Posts
Car: '89 RS camaro 305 TBI
Engine: LO3
Transmission: 700R4
Axle/Gears: yep, has those too (stock)
10-27-2012, 08:47 PM
#79
Member
iTrader: (1)
Join Date: Apr 2010
Location: California
Posts: 176
Received 0 Likes
on
0 Posts
Car: 89 Camaro Iroc Z
Engine: 305
Transmission: MK6 World Class T5
Axle/Gears: 9 bolt had 3.45's, now 3.27 gears
Re: Open Element Filter vs. Stock Air Filter???
Thought id share my experience on this one with everyone. I purchased a 1991 RS TBI 5.0 Camaro. It had the factory air cleaner setup on it when i got the car. about a month after having the Camaro i purchased a genearic open element air cleaner for it. I want to say it was 28.99 or something close to that and a 12 dollar filter. it was a 3" tall filter. Right of the bat i noticed a defnitly increase in accelration. When the motor was cold it would preform great. Only draw back to this that i did notice is once the motr was hot, If i punched the gas, the trans would kick down like it should, and the motor would bog down a slight bit before wanting to take off. That seemd to be the draw back of the open element. Even with that draw back it did seem to be an improvement over the factory setup. Now last week i took it a step further, and installed the TPI "Y" air cleaner box and ran it into the TBI. This has not changed the off the line take off that i can notice. It still seems to accelrate about the same but it did 100% fix the problem with the motor boging down when you punched it hard. It compleatly got rid of the prblem for me. now when you punch it, the trans down shifts, and motor instantly starts pushing harder, no hessistation any more. cant say wither or not i'm getting more power, but its just a bit better preformace with the elimitation of the hessistation. it did cost about 100 bucks to do it all. not sure it was entirely worth it but now on the high way or even at lower speeds the motor responds alot faster to the demand of heavy or wide open throttle.
Parts used,
Stock Z28 TPI "Y" airbox with daul filters. 30.00 form parts car
one 11 inch long peace of 3 inch dia. PVC. 2.99 from Lowes.
one 3 in to 3 in PVC tubing conector ( rubbe sleev with 2 clamps built on it) 5.00 from Lowes.
I had to use a 4inch to 3 inch reducer boot to mate up the PVC tubing to the Bonnet inlet. one 4 inch to 3 inch rubber reducer with 2 clamps included 12.00 at Pep boys.
1 TBI/Carb bonnet. It has a 4 inch inlet opening. simple and easey to install. 58.99 from Pep boys. Installs in the same mannor as a open element or factory air cleaner. To use the facotry thread rod and wing nut, simply remove the spacer ring the factory air cleaner sits on. takes about 10 to 20 secodns to install.
Two facotry air filters for any 85-92 Z28. about 5.00 to 6.00 dollars each for fram or STP brand filters at most auto parts stores.
just over 100 bucks.
The PVC is a tempory solution. I'm most likely going to go to the exaust shop and get a peace of 3 inch dia. tubing to use and wrap it with exaust manifold thermal wrap as the perment solution. so far using the PVC its not flexing or cracked as far as i can see. the system works great, and it eliminated the Very LOUD sucking noise that is heard when at Wide open throttle with the open element style. It took me about an hour to install this because i have a 84 Z28 hood, as they did not use the "Y" filter box until 85, i had to cut out notches in my hood. Any factory RS or Z28 hood is made to fit the Z28 air box even ifit dint come with it factory as long as your car or hood was made 85 or newer, I think.. I konw my old stock 91 RS hood had the factory notches in the bracing for it. If not for having to cut out some bracing on my old 84 hood, the instal would have only taken about 20 minutes. Just thought i'd throw this out there.
-Randy-
Parts used,
Stock Z28 TPI "Y" airbox with daul filters. 30.00 form parts car
one 11 inch long peace of 3 inch dia. PVC. 2.99 from Lowes.
one 3 in to 3 in PVC tubing conector ( rubbe sleev with 2 clamps built on it) 5.00 from Lowes.
I had to use a 4inch to 3 inch reducer boot to mate up the PVC tubing to the Bonnet inlet. one 4 inch to 3 inch rubber reducer with 2 clamps included 12.00 at Pep boys.
1 TBI/Carb bonnet. It has a 4 inch inlet opening. simple and easey to install. 58.99 from Pep boys. Installs in the same mannor as a open element or factory air cleaner. To use the facotry thread rod and wing nut, simply remove the spacer ring the factory air cleaner sits on. takes about 10 to 20 secodns to install.
Two facotry air filters for any 85-92 Z28. about 5.00 to 6.00 dollars each for fram or STP brand filters at most auto parts stores.
just over 100 bucks.
The PVC is a tempory solution. I'm most likely going to go to the exaust shop and get a peace of 3 inch dia. tubing to use and wrap it with exaust manifold thermal wrap as the perment solution. so far using the PVC its not flexing or cracked as far as i can see. the system works great, and it eliminated the Very LOUD sucking noise that is heard when at Wide open throttle with the open element style. It took me about an hour to install this because i have a 84 Z28 hood, as they did not use the "Y" filter box until 85, i had to cut out notches in my hood. Any factory RS or Z28 hood is made to fit the Z28 air box even ifit dint come with it factory as long as your car or hood was made 85 or newer, I think.. I konw my old stock 91 RS hood had the factory notches in the bracing for it. If not for having to cut out some bracing on my old 84 hood, the instal would have only taken about 20 minutes. Just thought i'd throw this out there.
-Randy-
10-28-2012, 08:41 AM
#80
Junior Member
Join Date: Dec 2007
Location: Upstate, NY
Posts: 52
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 RS Convertible
Engine: 305 TBI
Transmission: 7004R
Axle/Gears: 2.73 - POSI
Re: Open Element Filter vs. Stock Air Filter???
lozantius82 How long have you been using the set up? I have been wanting to do it for awhile now. I have most of the part minus the PVC. How well is it holding up? I am fearful if the PVC cracking or breaking with the heat of the motor.
Last edited by tmorris71; 10-28-2012 at 08:45 AM. Reason: Add text
10-29-2012, 01:21 AM
#81
Member
iTrader: (1)
Join Date: Apr 2010
Location: California
Posts: 176
Received 0 Likes
on
0 Posts
Car: 89 Camaro Iroc Z
Engine: 305
Transmission: MK6 World Class T5
Axle/Gears: 9 bolt had 3.45's, now 3.27 gears
Re: Open Element Filter vs. Stock Air Filter???
No problems at all, and i was gonna use 3 inch exhaust pipe from napa but i did not want to heat soak my air charge. Most expensive thing was the carb bonnet from summit.
06-14-2013, 05:21 PM
#82
Junior Member
Join Date: Jun 2013
Location: Columbus, OH
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 Firebird
Engine: 305 TBI
Transmission: Auto
Re: Open Element Filter vs. Stock Air Filter???
Beautiful Formula! I have an '89 Firebird base model with 48k miles, same Maui Blue. Thanks for the tips.
-Tony
-Tony
12-01-2014, 10:08 PM
#83
Junior Member
Join Date: Dec 2014
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Re: Open Element Filter vs. Stock Air Filter???
I do Apologize for bringing up an old thread but I have searched all over and can not find how to do this I should mention too that I am doing this to a 2000 Chevy Blazer LS with a 4.3L Vortec V6.....If any one Could tell me maybe the steps to do this I would appreciate it......again sorry for digging up an old thread and thanks to all in advance for the help...
Last edited by chevy3089; 12-01-2014 at 11:41 PM.
12-02-2014, 12:31 PM
#84
Supreme Member
Join Date: Apr 2006
Location: Northern, CA
Posts: 4,482
Likes: 0
Received 8 Likes
on
8 Posts
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Open Element Filter vs. Stock Air Filter???
Remove the stock air cleaner assembly including the rubber tube (PCV tube)that comes off the side of it and into the passenger side valve cover.
Put a crank case breather in the hole that is now open on top of that cover because of the tubs removal.
There will also be a small vacuum line going from the stock unit to the front of the TBI. Remove it and then cap off the nipple that is now open on the front bottom base of the TBI unit. Capping it is very important. If you don't have a cap at the moment than you can leave the hose on the TBI and put a screw in the other end.
Punch out the hole on the bottom/base of the open air assembly or drill one for the Intake Air Temperature Sensor (IAT) that came out of the bottom of the stock unit. I transferred the whole sensor including the round clip that holds it in.
Install the base of the open air element on the TBI using the stock metal spacer to keep the base off of the linkage if necessary. ( with a drop base you might need to apply a second 1/2in. spacer.)
Install the new filter on the new base.
Put the cover on and screw it down.
You have to decide if the depth of the filter is going to allow the hood to close.
If not you might need to get a different one.
Put a crank case breather in the hole that is now open on top of that cover because of the tubs removal.
There will also be a small vacuum line going from the stock unit to the front of the TBI. Remove it and then cap off the nipple that is now open on the front bottom base of the TBI unit. Capping it is very important. If you don't have a cap at the moment than you can leave the hose on the TBI and put a screw in the other end.
Punch out the hole on the bottom/base of the open air assembly or drill one for the Intake Air Temperature Sensor (IAT) that came out of the bottom of the stock unit. I transferred the whole sensor including the round clip that holds it in.
Install the base of the open air element on the TBI using the stock metal spacer to keep the base off of the linkage if necessary. ( with a drop base you might need to apply a second 1/2in. spacer.)
Install the new filter on the new base.
Put the cover on and screw it down.
You have to decide if the depth of the filter is going to allow the hood to close.
If not you might need to get a different one.
Last edited by Ron U.S.M.C.; 12-03-2014 at 07:25 PM.
12-02-2014, 03:07 PM
#85
Supreme Member
Re: Open Element Filter vs. Stock Air Filter???
The TBI motor does not have a knock sensor, it is a low compressions 8.5:1 engine & was designed to run on plain old 87 octane. Timing is simply controlled by the ECM based on the timing table programmed into it and readings based on other sensors.
Using premium fuel is simply waste of money and there is nothing to gain performance wise by using it.
The Tuned port engines 305 & 350s have knock sensors and slightly higher compression ratio. Premium fuel was recommend by the OEM from day 1 for optimum performance but the ECM will retard timing if lesser grade fuel is used and engine knock is detected.
Using premium fuel is simply waste of money and there is nothing to gain performance wise by using it.
The Tuned port engines 305 & 350s have knock sensors and slightly higher compression ratio. Premium fuel was recommend by the OEM from day 1 for optimum performance but the ECM will retard timing if lesser grade fuel is used and engine knock is detected.
12-02-2014, 07:02 PM
#86
Re: Open Element Filter vs. Stock Air Filter???
[QUOTE=FRMULA88;5849161
The TBI motor does not have a knock sensor,
it is a low compressions 8.5:1 engine & was designed to run on plain old 87 octane. Timing is simply controlled by the ECM based on the timing table programmed into it and readings based on other sensors.
Using premium fuel is simply waste of money and there is nothing to gain performance wise by using it.
The Tuned port engines 305 & 350s have knock sensors and slightly higher compression ratio. Premium fuel was recommend by the OEM from day 1 for optimum performance but the ECM will retard timing if lesser grade fuel is used and engine knock is detected.[/QUOTE]
Camaro and firebird TBI's don't have knock sensors is what your saying right? I know GM/Chevy TBI 4.3,5.0 and 5.7 trucks and suvs do have knock sensors
The TBI motor does not have a knock sensor,
it is a low compressions 8.5:1 engine & was designed to run on plain old 87 octane. Timing is simply controlled by the ECM based on the timing table programmed into it and readings based on other sensors.
Using premium fuel is simply waste of money and there is nothing to gain performance wise by using it.
The Tuned port engines 305 & 350s have knock sensors and slightly higher compression ratio. Premium fuel was recommend by the OEM from day 1 for optimum performance but the ECM will retard timing if lesser grade fuel is used and engine knock is detected.[/QUOTE]
Camaro and firebird TBI's don't have knock sensors is what your saying right? I know GM/Chevy TBI 4.3,5.0 and 5.7 trucks and suvs do have knock sensors
Last edited by 89-S-dime; 11-01-2015 at 12:59 AM.
12-02-2014, 08:56 PM
#87
Supreme Member
Join Date: Apr 2006
Location: Northern, CA
Posts: 4,482
Likes: 0
Received 8 Likes
on
8 Posts
Car: 1989 Iroc-Z Camaro
Engine: TBI,5.0
Transmission: Automatic 700R4
Axle/Gears: Eaton Posi,3.42,LPW Ultimate Cover
Re: Open Element Filter vs. Stock Air Filter???
chevy3089,
The Open Air Element may not be exactly a cool air intake without a cowl hood but it seems to be popular anyway.
I keep those directions in a file so I can use them over again.
Pretty simple really.
The Open Air Element may not be exactly a cool air intake without a cowl hood but it seems to be popular anyway.
I keep those directions in a file so I can use them over again.
Pretty simple really.
Last edited by Ron U.S.M.C.; 12-02-2014 at 09:16 PM.
10-25-2015, 01:30 PM
#88
Guest
Posts: n/a
Re: Open Element Filter vs. Stock Air Filter???
I'm researching this option. You did a great job with the pics. I would very much like to get all the model numbers of your setup. It's the best looking setup I have seen. Also did your filter housing come with a hole for the sensor or did you mod that yourself? You should be able to send me an email through Thirdgen but I'm sure other people would love to have that information also. Thanks. My vacuum diaphram motor is staying closed all the time so it's breathing nothing but hot air. I was getting knocks after it warmed up at low speed acceleration. Removed the stove pipe problem solved. So it's got to be the sensor or the vacuum switch. So I'm thinking why bother with replacing either one and just going with an open element setup instead.
01-13-2018, 05:41 PM
#90
Re: Open Element Filter vs. Stock Air Filter???
The TBI motor does not have a knock sensor, it is a low compressions 8.5:1 engine & was designed to run on plain old 87 octane. Timing is simply controlled by the ECM based on the timing table programmed into it and readings based on other sensors.
Using premium fuel is simply waste of money and there is nothing to gain performance wise by using it.
The Tuned port engines 305 & 350s have knock sensors and slightly higher compression ratio. Premium fuel was recommend by the OEM from day 1 for optimum performance but the ECM will retard timing if lesser grade fuel is used and engine knock is detected.
Using premium fuel is simply waste of money and there is nothing to gain performance wise by using it.
The Tuned port engines 305 & 350s have knock sensors and slightly higher compression ratio. Premium fuel was recommend by the OEM from day 1 for optimum performance but the ECM will retard timing if lesser grade fuel is used and engine knock is detected.
07-15-2018, 04:32 PM
#91
Junior Member
Join Date: Jul 2012
Posts: 36
Likes: 0
Received 2 Likes
on
2 Posts
Car: 85 Z28
Engine: V8 5.0L
Transmission: Automatic
Re: Open Element Filter vs. Stock Air Filter???
07-15-2018, 09:05 PM
#92
04-24-2019, 01:11 AM
#93
Junior Member
Join Date: Jul 2012
Posts: 36
Likes: 0
Received 2 Likes
on
2 Posts
Car: 85 Z28
Engine: V8 5.0L
Transmission: Automatic
Re: Open Element Filter vs. Stock Air Filter???
I was wondering if I have to take the valve cover off to remove the PCV hose in order to put in a breather. Thanks in advance.
Thread
Thread Starter
Forum
Replies
Last Post
1992 Trans Am
History / Originality
27
05-10-2023 07:19 PM
eightsixseven
Tech / General Engine
1
08-14-2015 03:09 PM
