Originally Posted by SeanH
Umm, on the compression - no, you're wrong. If you put the I head on an Eta bottom with with NORMAL Eta pistons, that's the compression you'll get. But, the Super Eta pistons are domed like the I pistons. The compression of an I head on an Eta bottom end with an Eta crank and Super Eta pistons is somewhere around 8:5.1
Also, regarding the chip. I personally wouldn't trust this "powerchip" place. I just looked - HOLY SHIT! $440 fucking dollars?!?! YOU HAVE GOT TO BE KIDDING. For that increase, it is NOT worth it. For that much, you can take the I top end and get a much better outcome. That, and a higher redline. The Super Eta is the PERFECT base for a stroker. Make use of it. Don't get that chip, WAY overpriced.
I'm just sharing my suggestions. You can go any route you see fit. Either way, teh car should be pretty cool.
according to to Bently bible for e30's i have 8.5:1 compression ratio already so from what you said i would be getting same compression i think my torque increase but the hp actually lowers i know this from a guy that did it to his super eta, but he has more torque at a lower rpm thou but that was on a completly stock no chip no exhaust so he doesn't know what hp could be after he does that stuff to it. but i wanna try turbo on my car first cause no one has done turbo to a stock super eta so i wanna try that first just to see what it the turbo can do with that torque it has in lower rpm's. but yeah i know thats hella expensive for a chip, i think the dinan one is cheaper too.