Stu,
it seems those pistons from Tlowe, will provide a 9.87 compression ratio with a 70CC chamber.
Your chamber is probably about 74CC will give a 9.44CR
Both scenarios is still higher than you want as far as your Target compression of 8:75/1 - 9:0/1
You can open up your chambers to get the desired compression ratio.
It's been a while since I opened up my large chamber cyl head, but IIRC, I believe it is @ 80 CC's. It's still in my car & that is the cyl head I am going to turbo charge for now.
If you do not plan on running a lot of boost pressure IE more than approx 12-15 psi, I would shoot for 9.25:1 cmpression ratio.
That way the turbo will spool faster, not be sluggish, better mileage, if any of those are any concerns.
Something to think about.
BTW, what are the specs on your camshaft?
MBHD
MBHD
