OK...In rebuilding my 2.4 911T engine, I had to decide between 2.4 911S pistons and 2.2 911E pistons. I finally decided on the 2.2 911E pistons paired with 911E cams. Now I am in doubt again. The 2.2 911E pistons weigh a full 53 grams more than the 2.4 911S pistons. Keep in mind that the 2.2 911E pistons offer about 9.6:1 CR vs 8.5:1 with the 2.4 911S pistons.

So here is the question: Am I better off using lighter weight 2.4 911S pistons even if the compression ratio is lower, or am I better off using the heavier 2.2 911E pistons which would give me a higher CR? I don't know what the real trade-off is! Please offer all the adivice or comments you can think of. Thanks in advance for your assistance! M