Plumbing an exhaust gas crossover...(Or what gives w/EGR-does it make a difference?) - Third Generation F-Body Message Boards

MatthewH · 05-15-2001, 03:29 AM

Hello,

Since I'm still up in the air on my choice of heads (The verdict is still out on my mystery heads...casting number 14102187) if in fact I do decide to use them they have no exhaust gas crossover. First question: Does ANYBODY make a TBI manifold with an external EGR setup? Second Question: Can I modify my stock intake to accept an external EGR setup? Third question: How come when I search old posts on this subject I see guys from California posting that they pass emissions with NO EGR?

I posted a while back about the effectiveness of EGR, and got some good answers. But now that I searched the archives I see posts from all sorts of people who pass emissions with no EGR valve. How is this possible? If it is-why the hell do we have EGR valves? I realize that another function is to curb detonation by lowering cylinder temps, but is there another way (aluminum heads, premium gasoline, coolant additives etc...)?

Ok, last part. Can the stock manifold be modified? I've looked at it and I can't seem to find a good place to drill a hole and tap a fitting to feed the EGR valve. It seems like the distance between the head and the valve itself is too small to fit anything, but can I tap in at some other point? Or how about this idea...run stainless steel line from the exhaust manifold to the intake manifold (fabricate a flange to match the EGR flange) and mount the valve itself inline somewhere?

Any ideas are appreciated,

Matthew C. Hall

steve8586iroc · 05-15-2001, 10:02 PM

Matthew, I know this is a tbi question but I think you might want to post this same question on the Tech/General Engine board as well. You will get some good responses there also.

Steve