Any of you guys using the 318i head?

[Guest Anonymous]

If so, what pistons are you using? I want to put a 2002 crank in my black, but I do not know what pistons are compatible. Flats? Piano's?

Thanks,

Jim

[robdelk]

piston must match HEAD bore and stroke

[Guest Anonymous]

None actually. You'll have to get custom pistons.

[MikeinNC]

It was for a friend, Brooke Smith. I used Tii 9.5 to 1 pistons. Clearance was fine. Runs pretty good, beat me at the O Fest Autocross this year.

[Harv]

Not sure, don't quote me on this but I think the 318i head has the largest combustion chamber of all the M-10 motors. If that is true, then all the pistons would work depending on the compression ratio your looking for. From me to you this is arm chair motor building. You'll have to look into it yourself. Custom pistons may be the way to go anyway. I think Metric Mechanic used the 318i head for their motors.

John

[Allenr56]

I am looking at doing this same swap, but I need to know before I start. Is there any reference to get a definitive answer on this.