Well, I 'think' it's an Edelbrock 2101.

My dad and I have been passing a 1985 Pontiac Trans Am back and forth between each other for years now. He's had it for the last 10 years or so. Since he's recently passed, I have the car back. While I'm happy to have it, he lived in Florida--no emissions inspection. I live in Colorado--dyno test and sniffer. I won't be able to register the car until it passes the sniff test, and without EGR it likely won't.

Besides having all of the emissions stuff ripped out of it, there are other liabilities. I've added a CAT back to the exhaust system, but in '07 we installed a mild crate engine. At some point he replaced the Weiand intake (said it was a chinese casting and was fighting intake manifold leaks) with what appears to be an Edelbrock Performer 2101 with the EGR provision.

Question is, what EGR valve is supposed to fit this thing? Is there some sort of adapter I need?

 

Does the egr plate look like this ?

https://www.rockauto.com/en/catalog/...egr+valve,4968

 

No. Those valves have a somewhat triangular base. The mounting location on the manifold I have looks like this (picture 6): https://www.jegs.com/i/Edelbrock/350/2101/10002/-1


Update: After speaking with Edelbrock Tech support, the port on the intake manifold is NOT used for EGR. It is intended for an air choke, which answers my question about it's design. Looks like I need another intake.

 

That’s for choke set.
maybe a 3701
https://www.summitracing.com/parts/EDL-3701/

 

Yes sir--that's the one the guy recommended. But I'm not going that route unless I absolutely have to. I'm hoping that 1) I'm able to tune the engine well enough to pass without EGR, and 2) that the cam provides enough overlap to make for some slight exhaust reversion, and leave a little exhaust in the combustion chamber for a 'natural EGR effect'. This is how modern variable cam timing engines work. Since I didn't degree the cam before we put the engine in I won't know until the test, but for those that may be able to calculate it based on cam specs, here they are:

.450 intake, .460 exhaust
222* intake, 222* exhaust @ .050 lift
114* ATDC intake, 114* BTDC exhaust

On a more personal note, I absolutely HATE EGR, especially systems that force exhaust gases through the intake. Nothing worse than an engine breathing its own fart, gunking up intakes and valves while doing it.

 

Honestly does not matter if the EGR is from cam overlap or the valve. The result is the same. The ports and valves will get dirty. HUGE problem for the direct injected engines to the point the manifacturers started using port fuel injection under WOT and cold start to help keep the buildup off the intake valves. I