Compression on a 930?
 

What is a good compression to do on a 3.4 turbo engine? I was thinking 7:5:1, what do you guys think?

will also have upgraded exhaust, intercooler, twin plugged, and turbo (probably k27 HF)

John, check this out:

http://forums.pelicanparts.com/911-engine-rebuilding-forum/322866-930-twin-turbo-3-4-project-commencing.html?highlight=930+turbo

7.5:1 will allow more top-end boost, 8:1 may be a bit better for you on the street--a little quicker off the line/low rpm.

Cheers

Thanks Scott

My vote is 7.5:1, which will allow you to run higher boost, than a 8.0:1 configuration and will still allow good streetability with nice aftermarket headers, turbo and exhaust.

Thans Merv. From the info I got from Scott I'm thinking I will go 7.5:1. Since I will be twin plugging it will really be closer to 8:1 anyways, and I dont want to have to buy new pistons for when i do decide to race. Also the pistons I'm getting are race pistons.