One thing leads to another... mean 318?

cawcislo said

I also have to consider the rods which have now been in and out a few times and reusing the rod bolts might not be a good idea if I plan on running the motor hard and this isn’t going to be A grocery getter. So with the time and or cost of pressing on and off the pistons, Buying and replacing rod bolts,, resizing I may be better off just buying Aftermarket rods such as eagle which cuts labour down, but adds to the amount of machining needed to bring crank back to balance as aftermarket rods are lighter then factory.
So what started off as a look see may have turned into a full rebuild... but I may be leaning towards building a mean 318... we will see.

Click to expand...

That's the way it goes...... I tried to salvage an Opel 4 banger last fall.... nope, full rebuild with better parts.

SCAT rods and KB's will drop the bobweight a bit over 300 grams. From doing a similar thing, this is probably one hole drilled in each large end counterweight in the crank to get it to balance. The nice part of the SCAT rods (and probably Eagles) and the KB's is that everything is well weight matched, and you can get a pretty good balance with no mods to the parts. So all you do is weigh a few parts, work up the bobweight, balance the crank. Saves dough.

Now the 390 suggestion saves crank work. But looks like the only CR choices with the milled heads will leave you with low 9's or low 11's for Static CR. I can only see forged piston options. Not cheap. But then again you are almost to that 408.... same 4" stroke.