Oh dear God! 318 stroker

Garrett Ellison said

Well, availability is the primary concern on crankshafts. Partly, the Eagle is just me “being cheap”, too, but I know even less about the Summit forged crankshaft that is presently available. Summit stipulates that weight addiction is often necessary, even though it’s over 15 pounds heavier than the the cast crank. So with that expenditure in mind, and bearing in mind that stiffer and precision machined cranks stress a block less, I checked with PROSTOCKTOM about a Molnar crank. I’m really thinking some beefier caps and a girdle on the late model block wouldn’t hurt anything, either! Well, maybe the budget, but… I wouldn’t say what happened to Gary was budget friendly either!

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My first 4" stroker was a SCAT cast unit (stronger than Eagle, but this was in '99 so nobody really knew then) I got from MoPar Perf. It had to have Mallory metal with lightweight SIR Eagle rods and Diamond dished pistons, which I thought was odd. The last one I did, I used Magnum 5.9L external balance and it worked fine. The steel cranks balance out fine, but costly and overkill for most realistic street applications. My last professional machinist used to circle track race some serious 360s and he refused to put Milodon caps on a 340 for me, he said a stock block will live better with OEM caps and not adding the outer cap bolts on the center mains. He said they used to add 340 stock caps to 318s and put the MP 340/360 ductile caps on stock blocks, after cutting off the outer bolt holes. I do have the Milodon caps on a 340/416, so we will see.