It is these pistons
https://www.*****************/fu/prod132493/W-ssner-Forged-Piston-Kit-Porsche-911-S-22-12v-1969-70--180PS-/
How is it possible to make the CR less by machine? do the grind some of the piston top off?
Both the pistons og cylinder I have, have driven 2 hours - so more or less brand new.
OR I could let them be 10.5:1 and make dual plugs. But i'm of the impression it will cost alot? but would I gain so much more hp and torque for street use to make it favorable? Still wan't to use a E cam, and the T heads and zenith if possible.
Will you recommend an other route making the best bang for the buck, when I have the stock 2.2T engine and the 85 mm S cylinders and the 85 mm 10.5:1 pitstons?