Yeah, the original balance shop can't do it, it needs weight added. It is going to Percise Engine Rebuilders for internal balancing.
374 Olds 350 stroker build
- Thread starter olds307 and 403
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I remember it being pretty expensive to add the mallory to the crank. Hopefully they do you right for the inconvenience.
My dad had an old 454 crank that had steel plates welded to the counterweights to internally balance it. This was in the early 80’s.
I went with internal balance since I am running as light as possible pistons and steel rods. Mark highly suggested to go that route. He claims it helps these high performance Oldsmobile V8's live successfully.
Not gonna claim to know Oldsmobile’s. In Chevrolet’s we only really worried about internally balancing in race engines. I even ran a 780 hp 7500 rpm externally balanced 454 crank in my 509. Went 9.50’s in my 3200 lbs chevelle.
Mark figures two slugs is the usual. What is the usual weight for slugs. I thought the guy said 120 grams? and was two much for the lead and frost plug their shop used. I would rather have welded in slugs that the other shop uses.
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