Piston Choice on 318

Kb is the only choice for a hi comp piston.I looked extensively a while back. The avg comp height for a cast piston runs between 1.72 and 1.75 roughly. Kb 167 height is 1.81. With magnums heads 10:1 is achievable.

So yes hyperuetectics are brittle due to the hi silicon content. I wouldn't use them if you are planning on nitrous. They are fine for most uses in street engines.Some guys race em,but forged would be better.

Actually I remember one other brand but it's cast.The only info I have is here.

http://chucker54.stores.yahoo.net/sppropisewmo.html

Not sure what head thier basing that 8.5 comp ratio on.