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Stroked 318

Posted: Tue Apr 26, 2022 9:45 am
by RICKYMOPAR
Stroked 318 LA in Bronco colors.jpg


Posting pictures of an engine I modified, for my son's ride. It is an LA series engine, 318 that is stroked to 390 CID. Our son is a big Denver Broncos fan.

Re: Stroked 318

Posted: Tue Apr 26, 2022 10:03 am
by Faulkner
I'm guessing the Broncos comment has something to do with the engine color, Rick? :wink:

Tell us about stroking an engine. Boring to oversize seems like a straightforward way to increase displacement, but how do you stroke an additional 72CI?!? Did you replace the crank?

Re: Stroked 318

Posted: Tue Apr 26, 2022 10:46 am
by RICKYMOPAR
This was the original engine for Kevin's Challenger. The over bore is .030 or 3.94 and the new stroke is 4.0 original is 3.31.
Mopar performance or Direct Connection crankshaft was utilized.
Icon forged pistons with relocated pin boss for increased stroke.
Eagle 6.123 H beam rods, standard length, performance mod.
Comp Cams mild performance torque enhancement cam kit, including double roller timing chain.
factory original adjustable rocker gear, raised .060.
2,02 intake valves and 1.065 exhaust for better breathing, mild port mods.
Picture of old heads and copper washers being modified to correct rocker arm geometry.
Later model 340/360 heads were used on engine to increase performance.