E46Fanatics - View Single Post - M54B30 Specs and Measurments
View Single Post
Old 03-23-2010, 06:59 AM   #20
58mm of Bliss
PEI330Ci's Avatar
Join Date: Jul 2003
Location: PEI,Canada
Posts: 4,370
My Ride: 330i, 330Ci
Originally Posted by ///Orient3 View Post

I was getting something close to those numbers, with a 33cc combustion chamber volume. I may have some insight to add tomorrow when I go to the machine shop. I have some printed calculation sheets with some of the numbers that CP uses, such as compressed gasket thickness (I believe .025). Also, aren't your CPs 84.5mm? My cylinder bore was 3.328. I'm guessing you were referring to the measurements for the stock pistons?
For the OEM calcs, I used 84mm bore.

I measured used gaskets that had already been compressed, and found them to be 0.030" thick. I have a new gasket at the shop I could measure for reference as well. (I'm amazed how much "new" stuff I still have)

Were you measuring the head with the spark plug installed?
PEI330Ci is offline   Reply With Quote