Compression - How much is too much?

[mcm95403]

This is why I am switching over to 91 small port electronics. that way I have a block with a knock sensor and a computer designed to work with it. I think it will be a much better start for a hi-comp engine.

I think you'd be fine bumping the CR up by a full point with the stock ECU. If you want, I have a set of standard bore 10:3 hi-comp pistons and rods I was about to put on E-bay. You can e-mail me through my website if you'd like to buy just the pistons. If you can, get your hands on a small port intake and epoxy it up like this (assuming you're not in a RWD car - if so you also need to relocate the TB of course):

http://www.marcmedina.com/intake.html

It made a significant improvement. Also, the longer tube from a small port that goes between the TB and AFM (assuming you're not MAP equipped) was also a nice improvement. I didn't believe it either till I tried it.