318 question

dirty white boy said
factory said 9.2 compression but with head cc and deck heights all over the spectrum on factory stuff it could be as low as 8.7 or worse, never know till its all measured up and figured out...think that's call blueprinting...DWB

100% on the mark! Ya gotta know for sure.

to get that 300 number, you're going to want compression and better breathing in the heads, so at least have those 302's massaged a little (put down the pitchforks, i said a little!) or diffent, better heads.

Charlie Servedio has a YouTube channel where you should be able to pick up a few things on porting a 318 head. Having never ported one before, this maybe an expense worth paying for. It’s up to you and your wallet. I don’t believe the as cast head is up to task while using a small cam and I believe the above quote is accurate for sure. Some work should be done.

273 said
Here's a xe262h 4 bbl and headers on a stock low cr 318 makes 282 hp @ 5000 rpm.
Add some cr and head work or better heads or step up in cam to reach your goal.

318 Long Block Bolt Ons - Tech Articles - Mopar Muscle Magazine

I agree with 273. :eek: Same reply as above would fit this build.

YY1 said
I'd suggest "doing the math" on the KB 167 vs the LA roller stock 9.2 piston to see if the extra .3 (or so) of compression is worth the expense.

If he needs new pistons…. That’s what I’d roll with.

Hoyt1234 said
What KB pistons are decent? Or just stock replacement that are good quality?

KB-167. A hyperutectic piston from Kieth Black. It’s a better piston. If you went with a stock replacement piston, from let’s say Badger or Federal Mougal, just due to the overbore there is an ever so slight increase in compression. You’ll need the specs of the piston to know where it’ll be end up.