Let me try to explain that again. I am looking to clean up my engine compartment while I drop my engine in and I am getting rid of the eight individual AIR tubes going to the primaries. I'm going to run a single line back to the collector instead. Anybody see any problems with this?

Steve

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Steve's Trans Am Temple

 

Aside from not passing a visual smog check that way, its fine. The LT1's only have one pipe going to one of the primaries for the AIR tube.

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West Coast GM Shootout 2001!
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=-

 

sounds great. and man you are a genious. i love you car and what you have done to it. if it works put it in a tech article and let us all know i might do it also..thanks

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1990 IROC-Z L98 350 TPI
AFPR 49PSI, GUTTED AIR BOXES, K&N, RAM AIR, UNDERDRIVE PULLEYS, PORTED PLENUM, B&M SHIFTER, 3.23 LIMITED SLIP, DUAL CATS, STOCK SUPER TURBO EXHAUST, COOPER COBRA XST's
ALUMINUM DRIVESHAFT OFF A 98 Z IN GARAGE READY TO GO ON. ALSO MAGANFLOW MUFFLER READY FOR INSTALL
DAILY DRIVER: 1991 S10 2.5L/5SPD WITH CAMARO RIMS
MUSTANGS...ONLY 4 LUGS....HAHA THAT IS HILARIOUS.

 

Uhh, thanks fellas. I hope to BS the smog guys if I have to pass that but we'll see. I hope to "baffle 'em with b*ll****" and do a song and dance saying that that is how the new ones are done. As far as being a "genius" Man, I wish. When I get it done I'll write it up you can count on it!

Steve

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Steve's Trans Am Temple

 

My friend's s-10 2.8L has the air just going into the manifold in one place. The tube looked to be about 5/8".

 

Was it a metal tube? I wonder how hot the air is in there; can I use a silicon hose? I bet it gets damn hot where it attaches to the cat, but I can't see why it would be hot enough to melt silicon... Anyone?

Steve

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Steve's Trans Am Temple

 

The AIR tubes are at the exhaust ports to assist in the burning of exhaust as it leaves the cylinder on cold startup. This allows the converter to heat up quicker. These is the reasons GM put AIR Injection by the ports. Disabling the AIR injection IS also illegal and will not pass visual inspection.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

 

Well, aren't fourth gen's piped into one spot? My understanding has always been that the air is pumped in to help the cat burn the exhaust gasses. If that is the case then it shouldn't matter where the air gets injected - it just matters that it does. As far as "legality" - I'll get over it as long as it passes emissions it shouldn't matter how it passes. Least to me. Boy howdy, when I'm king...

Steve

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Steve's Trans Am Temple

 

The rich mixture from cold startup necessitates the air being injected closer to the ports! Especially with batch fire FI and carb setups. The newer sequential FI cars only have one tube to the exhaust manifolds because they are more efficient. You may think it does not matter where the air is injected but if it did'nt then why did GM spend millions researching it?

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Recently Ported Heads, Installed Larger Race-Flo Valves and RPM Air Gap Intake (No new times)
Other Mods: You name it and I have probably changed it.

2001 Dodge Ram Quad Cab 5.9L 4*2

The Bowtie
ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!