TPI Questions

[Jeffrey R Muehl]

Thank you for your response - this is exactly what I was looking for.

I do understand that at idle and under full throttle EGR is inactive.
I am running headers on this motor so I do not have a source for exhaust
for EGR.
Next question:  Is there something I can do with the fuel regulator vacuum
line to increase fuel pressure at part throttle,
(and increase fuel delivery hopefully avoiding detonation).

>From what I've read, illuminating EGR and increasing fuel delivery at part
throttle helped throttle response.
Any guesses on how much I need to richen the mixture when EGR would have
been active?

[snip]

>> >3.  Any concerns with eliminating the EGR valve.
>> Noy sure but, without egr there could be more pinging (detination)
>
>If you are chunking the EGR valve just because it's the EGR valve, allow
>me to offer you a differing opinion.
>
>The EGR valve does not dilute the mixture during full throttle
acceleration.  When you are cruising or at part >throttle, the EGR allows
>the engine to run at leaner mixtures.  If you are running a stock ECM
>and prom and you don't have an EGR then you run the risk of detonation
>at part throttle settings.
>
>Bottom line, the EGR won't hurt your performance and the driveability
>will be better.  Unless your striving for a cosmetic goal or just want
>less complexity, I think you should connect it.
>
>Joe (That's my story and I'm sticking to it) Boucher
>'81 TBI Suburban   '70 RS/SS Camaro