A.I.R. system question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigd65 · 10-30-2003, 12:14 PM

i am bidding on a set of dynomax headers on EBAY but i have a question concerning the A.I.R. system. the headers dont have the bungs for the system and i am planning to put the system back. i do have a CAT that has the pipe fitting for the A.I.R. is there a difference or does it matter if they go into the header or into the CAT. we have emissions here and i will need to put the system back on by MARCH/04. what do yall think

PHOENIX · 10-30-2003, 01:25 PM

If they do a visual inspection you will need the injection tubes at the header/manifold. They may let you get away with it in your area, but maybe not.
The factory manifolds do not inject into each runner (?) in the header/manifold. The edelbrock TES headers for these trucks do have an injection tube for each runner. I am sure this helps in the emissions performance.

Check with your local station to see if you do in fact need the a.i.r. system. You may only need the EGR, CAT, PCV, and vacuum canister.

l3rian_King_196 · 10-30-2003, 01:37 PM

Watch out on ebay when buying parts or whatever Bought 400 bucks in items and didnt get a thing for it.

**swervin ervin** · 10-30-2003, 02:41 PM

The A.I.R. stuff is supposed to be at the exhaust manifold/header. The purpose is to inject air into the exhaust stream early on to lean out the exhaust mixture right when it comes out of the heads, to make it burn hotter to help burn any raw fuel. Down at the cat, which I have never seen, will not be factory. If someone is critical of this, they will turn it down right off the bat.

bigd65 · 10-30-2003, 04:59 PM

ok Mike, i knew you would hit right on the head. THANX.

PHOENIX · 10-30-2003, 05:28 PM

Not only that but injection air into a cat can cause it to overheat and become a danger. It is a way to cheat if done correctly.

bigd65 · 10-30-2003, 09:06 PM

i think i am just gonna wait, i like the flowtech shorties with the A.I.R. bungs already in them. i think that will be my best bet. then i gotta find an A.I.R. pump with a serpentine pulley. i still have the hose and crossover pipe from original.

apstguy · 10-30-2003, 10:22 PM

The AIR injection into the cat started in the late 90's and involves a much bigger emissions control system. Leave it capped. It would only screw things up.

I would like to find a AIR pump with a sepentine pulley also. Anyone got any links?

10-30-2003, 12:14 PM	#1
bigd65 Registered User Join Date: Mar 2000 Location: Clute, TX. Posts: 1,935	A.I.R. system question i am bidding on a set of dynomax headers on EBAY but i have a question concerning the A.I.R. system. the headers dont have the bungs for the system and i am planning to put the system back. i do have a CAT that has the pipe fitting for the A.I.R. is there a difference or does it matter if they go into the header or into the CAT. we have emissions here and i will need to put the system back on by MARCH/04. what do yall think __________________ 2004 Silverado Crewcab 1972 Chevy Monte Carlo 2017 Chevy Tahoe

10-30-2003, 01:25 PM	#2
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	If they do a visual inspection you will need the injection tubes at the header/manifold. They may let you get away with it in your area, but maybe not. The factory manifolds do not inject into each runner (?) in the header/manifold. The edelbrock TES headers for these trucks do have an injection tube for each runner. I am sure this helps in the emissions performance. Check with your local station to see if you do in fact need the a.i.r. system. You may only need the EGR, CAT, PCV, and vacuum canister. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

10-30-2003, 01:37 PM	#3
l3rian_King_196 Registered User Join Date: Oct 2003 Location: Charlotte, Nc Posts: 86	Watch out on ebay when buying parts or whatever Bought 400 bucks in items and didnt get a thing for it. __________________ l3rian_King_1967@yahoo.com http://f1.pg.photos.yahoo.com/l3rian_king_1967

10-30-2003, 02:41 PM	#4
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	The A.I.R. stuff is supposed to be at the exhaust manifold/header. The purpose is to inject air into the exhaust stream early on to lean out the exhaust mixture right when it comes out of the heads, to make it burn hotter to help burn any raw fuel. Down at the cat, which I have never seen, will not be factory. If someone is critical of this, they will turn it down right off the bat. __________________ Mike 1985 Chevy C-10

10-30-2003, 04:59 PM	#5
bigd65 Registered User Join Date: Mar 2000 Location: Clute, TX. Posts: 1,935	ok Mike, i knew you would hit right on the head. THANX. __________________ 2004 Silverado Crewcab 1972 Chevy Monte Carlo 2017 Chevy Tahoe

10-30-2003, 05:28 PM	#6
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Not only that but injection air into a cat can cause it to overheat and become a danger. It is a way to cheat if done correctly. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

10-30-2003, 09:06 PM	#7
bigd65 Registered User Join Date: Mar 2000 Location: Clute, TX. Posts: 1,935	i think i am just gonna wait, i like the flowtech shorties with the A.I.R. bungs already in them. i think that will be my best bet. then i gotta find an A.I.R. pump with a serpentine pulley. i still have the hose and crossover pipe from original. __________________ 2004 Silverado Crewcab 1972 Chevy Monte Carlo 2017 Chevy Tahoe

10-30-2003, 10:22 PM	#8
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	The AIR injection into the cat started in the late 90's and involves a much bigger emissions control system. Leave it capped. It would only screw things up. I would like to find a AIR pump with a sepentine pulley also. Anyone got any links? __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32



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