Since the MAF ended in 89, a cone air filter can be installed right onto the throttle body of 90-92 tpi. Other than taking out the air box, creating less weight and space, what would be the atvantage or disatvantage of using the cone air filter?

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91 Z28, 383 stroker soon
NEVER driven in any country other than Germany...

 

It's really MORE of a disadvantage since you're getting more HOT air in. I believe somebody tested it and found at least 6-7 HP loss... but I did it on the GTA anyway because it looks better... it's not a runner anyhow...just a cruiser. If I rigged up a opening in the TA hood vents it would probably help restore some of it. I just notice a little doggedness on hot days otherwise it's no big deal. Get lot of intake sucking noises when it's started up cold.

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'89 Formula - Thunderchicken - 355 Vette L98/T-5/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.

 

I tried one on my '90 IROC 5.7, and I say it performed better with it over the stock setup. I know everyone says it is drawing hotter air, but that hotter air sure doesn't have far to go. Another thing I liked about it is the 'open element' sound at WOT. If you use one (K&N)I recommend installing the coolant throttle-body bypass. I actually melted the rubber mounting flange to the point that it was no good before I noticed it. The aftermarket 'cold' air induction kits are also located in the 'hot' engine bay but they seem to work well. I don't know how much of a temperature difference there is between the battery location where the aftermarkets draw air from (SLP)and the area in front of the throttle body where the cone filter sits, but it can't be great.

 

The cold-air kits get their air from the fender, where its much cooler than behind the radiator. Try putting your hand between the radiator (watch out for the fans) and your engine sometime, then put your other hand over by the battery. You'll feel a big difference.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Yep Kevin is right again.
Look at the design of the SLP cold air induction kit. It bolts right inside your fenders.

If you want the cone filter, do what GMHTP did. Use the stock elbow, extend with PCV or exhaust pipe and mount the cone filter on to it.

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91 Formula
305 TPI 5speed
1LE/G92/WS6
Custom cold air intake w/K&N, SLP airfoil, ported plenum, Crane AFPR (47psi),Crane Ext Alum 1.6 full roller rockers, Timing set from 4*BTDC to 10*,MSD6AL, Holley 9mm Annihilator wires, Ac Delco cap,rotor and plugs, Bosch O2sensor, Slp 1 5/8 headers and catback (all stainless steel!), 3:73s,JET 195* fan switch, Macewen white face gauges, Intellitronix Digital Gauges

Stock throttle body, runners,intake manifold,cam, and heads.

 

So does the SLP actually have a hole cut through the inner fender and pulls outside air from the fenderwell? If that is the case then heck yea, its got to be better. If not, I still don't see much temperature differential between the two locations. Its all captive air under the hood, and if anything the intake would cause the hotter air to be drawn to it's location. Yes/no, maybe?

 

There already is a hole in my passenger fender, stock. The SLP unit connects to that hole. But it requires moving the battery. You can also put up some walls around the filter to shelter it from the hot engine air. I've seen people do that too.

 

Yea, the SLP setup is kinda a setup you can make your own at home.

The single cold air SLP setup looks like a black scoop. Bolts inside your fender as Kevin said. The air intake elbow has dividers in it also.

The dual SLP intake requires you move the battery to the trunk. PITA.

You can do a similar setup by taking a dual tb intake elbow off any stock 5.7L Camaro and using piping. That's what I plan to do.

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91 Formula
305 TPI 5speed
1LE/G92/WS6
Custom cold air intake w/K&N, SLP airfoil, ported plenum, TB coolant bypass,Crane AFPR (47psi),94 octane,Crane Extruded Alum. 1.6 full roller rockers, Timing set from 4*BTDC to 10*BTDC,MSD6AL, Holley 9mm Annihilator Laser shot 50 wires, Ac Delco cap,rotor and plugs, Bosch O2sensor, SLP 1 5/8 headers,SLP catback,3:73s,JET 195* fan switch, Macewen white face gauges, Intellitronix Digital Gauges

Stock throttle body, runners,intake manifold,cam, and heads.

 

I had the filter right at the throttle body and it not only sucks in hot air hurting performance, but it also is very inconsistant. i.e. when the fans kick on and the engine temp goes down, your times go down. When the fans come off and the temp goes up, so do your times. I have researched this and done extensive track testing.

My solution was a "custom" cold air like mentioned before. I used an elbow from an '88 firebird TPI, 3" exhaust w/ a bend in it, black plastic w/ some weather strip, and a cone filter. This mod was good for a SOLID and CONSISTANT .2 off the 1/8th. It didnt' matter what the engine temp was. Ck out the pic





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[This message has been edited by GMTech (edited December 14, 2000).]

[This message has been edited by GMTech (edited December 14, 2000).]

 

is that a 1000cfm filter?

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91 Formula
305 TPI 5speed
1LE/G92/WS6
Custom cold air intake w/K&N, SLP airfoil, ported plenum, TB coolant bypass,Crane AFPR (47psi),94 octane,Crane Extruded Alum. 1.6 full roller rockers, Timing set from 4*BTDC to 10*BTDC,MSD6AL, Holley 9mm Annihilator Laser shot 50 wires, Ac Delco cap,rotor and plugs, Bosch O2sensor, SLP 1 5/8 headers,SLP catback,3:73s,JET 195* fan switch, Macewen white face gauges, Intellitronix Digital Gauges

Stock throttle body, runners,intake manifold,cam, and heads.