40 nissan

[cdixon4950]

I'm building up a hot little 40 nissan 3cyl to run on a flat bottom aluminum boat. I was wondering how much compression can i run on 93 octane or how much i can mill from the head? Also, i'm wanting to spin balance the crank but how is this accompllished after the crank has been welded???

[Fast Fred]

150 psi would be safe, there is nothing to spin balance, just true it, done.:cool:

[cdixon4950]

Can you pm me your number? I need to talk to you about gettin some port work done.

or email it at cdixon4950@gmail.com

Thanks,
Chad

[Fast Fred]

where are you from , about. i don't really do them any more, i work on boats, motors, all day, every day, but i mite be up for one:cool: e-mail is down.:eek:

[cdixon4950]

Georgia, still looking for some 70hp carbs and 50hp intake if you got any laying around???