SP2P 2bbl worth the effort?

AJ/FormS said
I think EGR got a bad rap because people didn't understand it, all that well.
I wouldn't retrofit it to my engine unless forced to, but I have had good success tuning with/around it. It's a Part-Throttle device and when correctly working, you should never know it's there, under load or at WOT.
Anybody running a long-period cam already has some to a lotta EGR at rpms up to 2000 rpm or perhaps a lil higher. Chrysler exploited this in the early years, and so were one of the last car-companies to adopt EGR hardware.

FWIW, The EGR valve closes with a lack of vacuum.
I forgot what I tested it to BUT it would be similar to going around someone on the Hwy. or getting in the Hwy. I think is was around 10 or 12 inches of vacuum.

Once the valve closes, it’s just like any other pre smog intake, just air and fuel running through it.
Magen the valve is open, it introduces exhaust which is an inert gas. This allows you to advance the timing more than without it. That is also IF you can use it or need it.