400 Hp ( Street 318 ) Build !

I've never had a 318 on a dyno.
I have built a few.

318s have low output because of the
3 C's

Compression
Camshaft
Carburetion

#1 being Compression....all 318s were 9:1 or less.

Custom 318 pistons are pricey.

Someone really should dyno a 10-11:1 318 combo, but not many people buy custom 318 pistons though.