2.2 E or S Pistons for 2.4 upgrade?
 

I am looking to put 2.2 E or S pistons in my 2.4T engine. The previous owner had it rebuilt by Motormeister right before I bought it and it has leaked oil at the camshaft housing to head mating surface since I bought it 3 years ago. Since it has to be taken apart to fix this leak (hopefully Motormeister will do this for me as it is their rebuild that leaks since day one - I have asked them multiple times what it could be and they say do a dye test to be sure), I thought I should upgrade the pistons to higher compression 2.2 pistons.

My question is this - since MM shaved the heads to raise compression, and also put in Solex cams, will I have trouble fitting in 2.2S pistons? cannot I just use a bnig enough cylinder base gasket to accomodate S pistons, or is this going to be too tight and I should go for 2.2E pistons or custom JE's instead.

This boards expertise is much appreciated.

Thanks,

Jim Chatfield
1972 911T

It is possible that you will have piston/valve clearance issues. Due to the custom work on the heads and mish/mash of Solex cams, 70.4mm crank, 2.2l pistons, the only way to find out is going to be to do a trial assembly and clearance check. As a data point, I am running 2.2T pistons with shaved heads and Crane 288 cams - a bit more duration and lift than solexes. I have ZERO breathing room on my piston/cam clearance. That's AFTER the 2.2T pistons had significant amounts of relief cut into them.