TPI Cold Air Intake for TBI
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Car: 91RS_92Z28
Engine: 5.0_5.7
Transmission: WCT5_WCT5
Axle/Gears: 3.08_3.42
TPI Cold Air Intake for TBI
With the aid of the local parts yard and TGO I made a pair of cool, quiet and factory appearing cold air intake systems.
Parts:
TPI air box
Factory air cleaner flex hose
Cadillac air cleaner bonnet
Crankcase breather
JB Weld
Parts:
TPI air box
Factory air cleaner flex hose
Cadillac air cleaner bonnet
Crankcase breather
JB Weld
Last edited by srdynamics1; 08-11-2005 at 01:23 AM.
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Car: 91RS_92Z28
Engine: 5.0_5.7
Transmission: WCT5_WCT5
Axle/Gears: 3.08_3.42
The caddy bonnet is too tall for the stock hood so I cut off the bottom, flipped it over and JB welded it back on. The IAT (intake air temp) sensor was RTVed into one of the existing ports. There are two types of the caddy bonnets. One has knockout ports that need to be drilled out, and the other has thermac vacuum connections and a crankcase breather filter assembly.
BTW: The thermac flapper valve is eliminated. This results in a longer to warm up time and you will fail the epa emissions visual test.
BTW: The thermac flapper valve is eliminated. This results in a longer to warm up time and you will fail the epa emissions visual test.
Last edited by srdynamics1; 08-11-2005 at 01:23 AM.
#5
I did the same last year. How well does the Caddy TGI Hatfit with the botttom flipped over? I just cut a plate to take up the room from cutting mine flat that sits under the Hat.
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Car: 91RS_92Z28
Engine: 5.0_5.7
Transmission: WCT5_WCT5
Axle/Gears: 3.08_3.42
Originally posted by icarus402001
...How well does the Caddy TBI hat fit with the botttom flipped over? I just cut a plate to take up the room from cutting mine flat that sits under the Hat.
...How well does the Caddy TBI hat fit with the botttom flipped over? I just cut a plate to take up the room from cutting mine flat that sits under the Hat.
Flipping the ring over works perfectly. It mates up to the TBI in the exact same way. The mounting ring is the same on both sides. I also gutted the metal frame and ring inside the bonnet. I kept the factory gold metal spacer ring in order to have clearance for the injector pod and future spacer.
Originally posted by Ronny
please give me the measurement for net height of the Caddy Bonnet only as well as the net height for the TPI air box. is the TPI box a stocker? or aftermarket SLP?
please give me the measurement for net height of the Caddy Bonnet only as well as the net height for the TPI air box. is the TPI box a stocker? or aftermarket SLP?
It is the stock TPI airbox.
Last edited by srdynamics1; 08-11-2005 at 05:28 PM.
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Car: 89 camaro rs
Engine: 305 tbi
Transmission: 700r4
Originally posted by srdynamics1
[BI kept the factory gold metal spacer ring in order to have clearance for the injector pod and future spacer.[/B]
[BI kept the factory gold metal spacer ring in order to have clearance for the injector pod and future spacer.[/B]
then again my clearance issue was at the end of the bonnet, because mine is pointed towards the driver healight. bonnet=level... hood=slope... they had to meet somewhere. i 'fabbed' up a gasket for the tb that would tilt the bonnet a little. i love it.
i also removed the metal tripod thing inside. it was just in the way and restricting airflow.
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Originally posted by NEEDforSPEED
i dislike the whole TPI snorkle! looks cool but just doesnt work like it looks like it should....
i dislike the whole TPI snorkle! looks cool but just doesnt work like it looks like it should....
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Car: 1988 Camaro w/T tops
Engine: 305 L03
Transmission: 5 speed
Cold Air Intake
I really like the looks of your cold air induction setup - good job! I need to know what year of cadi that your air cleaner bonnet is off of. I assume that it was a TBI - right? Is the flex hose off of the same vehicle? Please let me know. I am anxious to give this a shot! Thanks for sharing. Take care.
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Car: 91RS_92Z28
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Re: Cold Air Intake
Originally posted by Larry Cooper
I need to know what year of cadi that your air cleaner bonnet is off of. I assume that it was a TBI - right? Is the flex hose off of the same vehicle?
I need to know what year of cadi that your air cleaner bonnet is off of. I assume that it was a TBI - right? Is the flex hose off of the same vehicle?
The exact years escape me but I want to say late 80s to about 91 4.9L TBI caddilacs. You will need the rubber elbow from the caddy to connect to the factory camaro air cleaner's flex hose. It is a perfect fit. I have seen the TPI rubber hose used too, but I didn't like the way it looked or fit.
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Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
Do a search under ram air and my username. I did a test at the track with the exact same caddy intake w/ the tpi induction plus ram air boxes vs open element, as well as with and without filters. The tpi/caddy cold air cannot beat the 'ol open element. The only difference is that I do have a cowl hood which may make a difference. Good job on the set up though.
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Car: 91RS_92Z28
Engine: 5.0_5.7
Transmission: WCT5_WCT5
Axle/Gears: 3.08_3.42
r90camarors-
Yes I did read your threads and others before making mine.
https://www.thirdgen.org/techbb2/sho...t=open+element
https://www.thirdgen.org/techbb2/sho...light=cold+air
https://www.thirdgen.org/techbb2/sho...hreadid=242054
https://www.thirdgen.org/techbb2/sho...t=open+element
Not to start a this debate again but I prefer to not use the open element for two reasons, noise and appearance. I like my car to appear stock and be quiet. I do not drag race this car and a tenth or two is of little concern.
Yes I did read your threads and others before making mine.
https://www.thirdgen.org/techbb2/sho...t=open+element
https://www.thirdgen.org/techbb2/sho...light=cold+air
https://www.thirdgen.org/techbb2/sho...hreadid=242054
https://www.thirdgen.org/techbb2/sho...t=open+element
Not to start a this debate again but I prefer to not use the open element for two reasons, noise and appearance. I like my car to appear stock and be quiet. I do not drag race this car and a tenth or two is of little concern.
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Car: 1988 Camaro w/T tops
Engine: 305 L03
Transmission: 5 speed
TPI Cold Intake for TBI
Thanks for your reply. I'll hunt one of the Caddy air cleaners down with the info you provided. Thanks, again!
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Car: 89 camaro rs
Engine: 305 tbi
Transmission: 700r4
Originally posted by srdynamics1
underside
underside
#20
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
Found some parts in the local J yard. Now if I stay stock with the filters and don't alter the air boxes will I be doing Ram Air or Cold Air? Also do I need the tube for the MAF sensor?
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
HERE'S A PIC
$50.00 FOR THE WHOLE SETUP. $15.0 FOR THE MAF and I probably don't need it.
srdynamics: Where did you get the red bow tie? Nice touch and it makes it look factory.
srdynamics: Where did you get the red bow tie? Nice touch and it makes it look factory.
Last edited by 86NiteRider; 08-21-2005 at 09:07 PM.
#22
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Originally posted by 86NiteRider
Now if I stay stock with the filters and don't alter the air boxes will I be doing Ram Air or Cold Air? Also do I need the tube for the MAF sensor?
Now if I stay stock with the filters and don't alter the air boxes will I be doing Ram Air or Cold Air? Also do I need the tube for the MAF sensor?
Sell the MAF to someone who needs it cause your TBI doesn't use one.
Originally posted by 86NiteRider
Where did you get the red bow tie?
Where did you get the red bow tie?
Good luck and post some pics when you are done.
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Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
Definetely cut the bottom of the tpi piece. The stock set up is very restricting. As long as you place the IAT somewhere in the air stream, the ecm should compensate for the cooler air. Further more, keeping the bottom pieces in place isn't going to make it draw in warmer air, just less air.
I actually put my set up back on a few weeks ago, but with a conicle(yeah I probably butchered the spelling...). The caddy hat is perfect for the dry shot I'll have pics up in another post.
I actually put my set up back on a few weeks ago, but with a conicle(yeah I probably butchered the spelling...). The caddy hat is perfect for the dry shot I'll have pics up in another post.
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
Okay, so some say cut the bottom and others say don't. I won't be driving my car in Chicago winters if I can help it. It would have to be an emergency for that to happen.
r90camarors: What is a IAT? I will be in Morris on Sept. 3rd at the h.s. after 12 noon refereeing a football game. I would love to see your setup and how you cut it out. Maybe you could pmail me.
Also wondering where the different filters and that little electronic thingy/vacumn line in my current OEM air cleaner would go in the Caddy bonet. Maybe that is the IAT? Is that the piece that srdynamics has fabed into the side of the bonet? I guess I will have to fabricate too.
Thanks
r90camarors: What is a IAT? I will be in Morris on Sept. 3rd at the h.s. after 12 noon refereeing a football game. I would love to see your setup and how you cut it out. Maybe you could pmail me.
Also wondering where the different filters and that little electronic thingy/vacumn line in my current OEM air cleaner would go in the Caddy bonet. Maybe that is the IAT? Is that the piece that srdynamics has fabed into the side of the bonet? I guess I will have to fabricate too.
Thanks
Last edited by 86NiteRider; 08-21-2005 at 09:06 PM.
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Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
86niterider,
The IAT detects the temp of the incoming air. This allows the ecm to adjust fuel and timing w/ respect to the air temp. It is origionally located on the bottom of the stock air cleaner. You can fab the caddy hat to work w/ it using one of the 3 "ports" on the side of the piece. If you have a 90-92 tpi piece with the sensor on the drivers side, I assume you could make that work as well.
The vacuum line I believe you are refering to is not needed and you can plug it on the tbi. It is origionally intended to help the engine warm up faster, but is pretty much useless.
As far as the breather filter goes (the tube/filter stemming from the passenger side valve cover) the easiest thing to do is by an external filter w/ grommet. It is inexpensive and easy to do.
Just shoot me a PM when you get a chance.
Roy
The IAT detects the temp of the incoming air. This allows the ecm to adjust fuel and timing w/ respect to the air temp. It is origionally located on the bottom of the stock air cleaner. You can fab the caddy hat to work w/ it using one of the 3 "ports" on the side of the piece. If you have a 90-92 tpi piece with the sensor on the drivers side, I assume you could make that work as well.
The vacuum line I believe you are refering to is not needed and you can plug it on the tbi. It is origionally intended to help the engine warm up faster, but is pretty much useless.
As far as the breather filter goes (the tube/filter stemming from the passenger side valve cover) the easiest thing to do is by an external filter w/ grommet. It is inexpensive and easy to do.
Just shoot me a PM when you get a chance.
Roy
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
Thanks. Just waiting to get my car back from the deallership. getting a new intake manifold instalded and some other odds and ends, then on goes the new air system. I'll keep you guys informed.
#27
Looking at your pictures, it almost appears that the section you cut off and reattached would shroud the entire top of the TBI. Have you done the ultimate mods to your throttle body?
#28
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i did this sort of thing with my tbi a couple of months ago.i did`nt like how it seemed that i would always get more bugs and what not in my filter,although i did feel alittle more kick up top.i had to go with an open element due to the eddy tbi stb.there are alot more ideas in the archives than useing the caddy hat it just seems to look weird to me IHMO.but good job none the less.
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
Tbi to Tpi conversion is complete. New radiator-3 core alum, new thermo stat-185, and new temp sending switch makes this '92 run real cool. Next up is to install new intake and valve covers. Here are pics.
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Car: 1999 Yamaha Banshee
Engine: 379cc twin cyl 2-stroke stroker
Transmission: 6 spd manual
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Personally I don't like the idea. It involves too much money and time. Do you have any idea how many cars are out there that run the quarter-mile in about a minute and a half faster then you that run an open element?
#31
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
pic2
Last edited by 86NiteRider; 10-18-2005 at 07:50 PM.
#32
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
pic 3
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
Originally posted by brodyscamaro
Personally I don't like the idea. It involves too much money and time. Do you have any idea how many cars are out there that run the quarter-mile in about a minute and a half faster then you that run an open element?
Personally I don't like the idea. It involves too much money and time. Do you have any idea how many cars are out there that run the quarter-mile in about a minute and a half faster then you that run an open element?
I didn't spend that much money either as the junk yard is like a cheap gold mine. And I took my time doing it as there was no reason to rush.
Last edited by 86NiteRider; 10-19-2005 at 12:49 PM.
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
What's wrong with that info? Did I miss something? And I don't care about the TBI mod's. I have my own opinions and if a change to my cars works for me that's all that matters to me. Besides all of that, I have no plans to race this car so open element vs cold air or fast track times vs slow times don't matter to me!
Last edited by 86NiteRider; 10-19-2005 at 12:51 PM.
#36
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Car: 91RS_92Z28
Engine: 5.0_5.7
Transmission: WCT5_WCT5
Axle/Gears: 3.08_3.42
Ahh internet forums. If I didn't think of it or run it on my ride it must be crap, useless or rlcey.
Any schmuck can go to autozone and slap an open element on and listen to that annoying woosh up and down that track for cars that can't turn. (and still get laughed at).
Brody- If I cared about 1/4 times I sure as hell woudn't be driving a lo3 3rd gen.
Any schmuck can go to autozone and slap an open element on and listen to that annoying woosh up and down that track for cars that can't turn. (and still get laughed at).
Brody- If I cared about 1/4 times I sure as hell woudn't be driving a lo3 3rd gen.
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
Okay, finally got the new intake on and just got to take some pics.I really love the performance of my car now. Think I will put it up for the winter so that when the garage door opens in April everything is GREAT.
This threadshould be added to ultimate mods as another alternative to making your engine run cooler.
This threadshould be added to ultimate mods as another alternative to making your engine run cooler.
#38
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Car: 1999 Saturn SL2
Engine: 4 cylinder
Transmission: 4-speed automatic
Originally posted by 86NiteRider
What's wrong with that info? Did I miss something? And I don't care about the TBI mod's. I have my own opinions and if a change to my cars works for me that's all that matters to me. Besides all of that, I have no plans to race this car so open element vs cold air or fast track times vs slow times don't matter to me!
What's wrong with that info? Did I miss something? And I don't care about the TBI mod's. I have my own opinions and if a change to my cars works for me that's all that matters to me. Besides all of that, I have no plans to race this car so open element vs cold air or fast track times vs slow times don't matter to me!
He spends a huge chunk of the page talking about making a cold air intake (and believing that there are "huge gains" to be had from one), but barely touches on PROM tuning/burning, a critical part of any EFI performance buildup, including TBI. Instead, he recommends a JET chip.
The author also goes into detail about changing out the stock accessories such as the water pump, thermostat, radiator, cooling fan, and oil cooler for a performance replacement. Not once (yes, not even ONE TIME) does he mention replacing the stock manifolds on the LO3 with a set of headers, which would most certainly provide more power than replacing all of things he mentioned above.
He also make a big deal about upgrading the stock TBI unit by porting it out or buying a bigger aftermarket unit. I don't have a TBI car, but from what I hear, the gains from an aftermarket or upgraded TBI unit are not that impressive, especially considering the fact that a better camshaft would provide much better results as far as $$-to-HP ratios are concerned. He barely mentions anything about a camshaft in the entire page.
And most of all, my favorite two quotes on the whole page:
Whoever has the most torque wins. Period.
The 200 horsepower, 300 ft/lbs. torque car will run away from the 300 horsepower / 200 ft/lb. car all day long, without effort.
I can point out more bits of misinformation on his site if you would like, but I believe these are the most relevant to the discussion at hand.
In any case, I don't believe the author wrote this with the intent to trick or decieve anyone. I think he was simply misinformed and unaware of where real power can be achieved with the LO3. Not to mention the site is more than a few years old now. Stick with the advice given on thirdgen.org, and you'll be alright.
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Car: 1991 camaro RS
Engine: CharlesOdoryOB
Transmission: 82513892892
Axle/Gears: pbr disc 3.27 nine bolt
would a 96+ tbi blazer intake fit the throttle body?
they do not have the weird curve like the caddys
they do not have the weird curve like the caddys
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Car: '91 t-top RS; '91 hrdtp Z28
Engine: LO3;383tpi
Transmission: 700r4;very nice 700r4
Axle/Gears: 4.10 zt posi, 3.70 auburn
would a 96+ tbi blazer intake fit the throttle body?
Like I said, it was aftermarket, but I would have to assume the housings had to be pretty similar to oem.
#41
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
Nate: At least you had an informed intelligent reply that can to the article link that can considered as opposed to brodyscamaro smart mouth post.
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Car: 96 Silverado/99 Suburban
Engine: 700 cubic inches of 'Muican Awesome
Transmission: 4L80/4L60
Axle/Gears: Chunky/Clunky
Everyone keep it clean please. Unless you have something intelegent to say, don't say it. And I'm not just talking to a few people, that goes for anyone. You have been warned...
#43
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
90RS305: Okay can you addt his post to the top with the Ultimate Mods.? I think it is helpful for those that want to do this mod.
Last edited by 86NiteRider; 11-25-2005 at 01:38 AM.
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I did that mod quite a number of years ago. I took it 1 step further though. The Fog light area to the TPI air box has been sealed with aluminum, caulking thus turning the fog light area into 2 air scoops.
I used the original TBI air cleaner box rotated towards the tpi air box to act as a large air resevoir at low speed. The air heater assembly/heat pipe from the exhaust was removed and that part sealed.
TPI K&N air filters are used.
I think it works rather well. I had my L03 running traps of 93 mph with STOCK intake, heads, peanut cam, exhaust manifolds...
I used the original TBI air cleaner box rotated towards the tpi air box to act as a large air resevoir at low speed. The air heater assembly/heat pipe from the exhaust was removed and that part sealed.
TPI K&N air filters are used.
I think it works rather well. I had my L03 running traps of 93 mph with STOCK intake, heads, peanut cam, exhaust manifolds...
#45
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Car: 96 Silverado/99 Suburban
Engine: 700 cubic inches of 'Muican Awesome
Transmission: 4L80/4L60
Axle/Gears: Chunky/Clunky
Originally posted by 86NiteRider
90RS305: Okay can you addt his post to the top with the Ultimate Mods.? I think it is helpful for those that want to do this mod.
90RS305: Okay can you addt his post to the top with the Ultimate Mods.? I think it is helpful for those that want to do this mod.
#46
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Location: Somewhere around the South Side of Chicago just crusin' in one of the Niteriders
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Car: 92RS 25th Anniv./88 IROC Z28 Vert
Engine: 305 TBI w/Tpi Air / 305 TPI
Transmission: 700r4/700r4
Axle/Gears: Posi
Thanks for the link to CAI.
Slade1: Any pics or drawings?
Slade1: Any pics or drawings?
#47
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I'll take some pics today, weather permitting. I'm getting my stickers renewed Monday for it...
I haven't driven an f-body for 2 weeks now... suffering from f-body withdrawal symptoms... or the flu lol. Sucks to see both my cars idle due to weather.
I haven't driven an f-body for 2 weeks now... suffering from f-body withdrawal symptoms... or the flu lol. Sucks to see both my cars idle due to weather.
#48
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Car: 91 RS Camaro
Engine: 305 TBI
Transmission: a/t
did something very similar to mine except i used the hat off of a 96 vortec and 3 inch rubber hose. worked real good until the nitrous popped back and busted the hat and the tpi piece. Oh well I bought a ss style hood so now i am going to build a ram air set-up for it.
#49
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Slade1
I realize this is an old post, but this is the exact idea I had also..I bought the parts yesterday, except for the ducting...Where did you get yours.???? Also, are you still using this setup???? If not why???? If so, are you still pretty happy wth it????? Thanks in andvance for your help, Tom
I realize this is an old post, but this is the exact idea I had also..I bought the parts yesterday, except for the ducting...Where did you get yours.???? Also, are you still using this setup???? If not why???? If so, are you still pretty happy wth it????? Thanks in andvance for your help, Tom
#50
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Car: 91 RS Camaro
Engine: 305 TBI
Transmission: a/t
I did that to a couple of camaros worked good. The 3" hoxe is just a piece of rubber hose like for a radiator for a semi truck, most parts house have these. As for under the tpi base in the front end I left this open but have heard of ppl using metal duct work for a house from Lowe's or Home Depot.