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Aurora40 · 08-29-2008

The check valves are those flared things where the pipes come out of the manifolds, they sort of "float" right on top of the manifolds. That's what keeps exhaust from travelling up the AIR tubing.

The AIR pump only runs at startup. I think 60 seconds on a cold start and 30 on hot? Might be 90 on cold start...

The purpose is to heat up the cats faster, because they don't work at all when cold. I believe the fresh air is to burn residual fuel in the exhaust, which will heat the cats up faster.

I don't believe the purpose is to "dilute" the exhaust, as that really doesn't clean anything up, it just makes it seem cleaner from a ppm standpoint.

I think if you were to add the tubes to headers, you'd at least want to add some stubs to them before getting them coated, otherwise you'd have to remove the coating from the area you are working on. I don't know, but I'd guess plumbing type attaching wouldn't work. Your exhaust, especially at the header, gets a heck of a lot hotter than any hot water pipe.

I'll try to get some pictures when I get home of how mine is set up, perhaps that will help in some way?

08-29-2008	#2
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,704	Re: A.I.R system Q's The check valves are those flared things where the pipes come out of the manifolds, they sort of "float" right on top of the manifolds. That's what keeps exhaust from travelling up the AIR tubing. The AIR pump only runs at startup. I think 60 seconds on a cold start and 30 on hot? Might be 90 on cold start... The purpose is to heat up the cats faster, because they don't work at all when cold. I believe the fresh air is to burn residual fuel in the exhaust, which will heat the cats up faster. I don't believe the purpose is to "dilute" the exhaust, as that really doesn't clean anything up, it just makes it seem cleaner from a ppm standpoint. I think if you were to add the tubes to headers, you'd at least want to add some stubs to them before getting them coated, otherwise you'd have to remove the coating from the area you are working on. I don't know, but I'd guess plumbing type attaching wouldn't work. Your exhaust, especially at the header, gets a heck of a lot hotter than any hot water pipe. I'll try to get some pictures when I get home of how mine is set up, perhaps that will help in some way?