Crank options for a LM7
Thread Starter
Joined: Oct 2005
Posts: 4,768
Likes: 26
From: Central Valley
Crank options for a LM7 I'm looking at my options for a crank in a LM7, size and brand and why. I'm going with a 3.898 bore so it will at least be a 346ci. Motor will see boost btw, 8-12lbs and with have 317 heads and I'll run 9.5:1 compression
Thread Starter
Joined: Oct 2005
Posts: 4,768
Likes: 26
From: Central Valley
i've thought of that but if the shop ***** up on rebalancing the crank and the engine goes to **** i'll be very unhappy. i can have it looked at i suppose or i could go with a 4" if i want a 383 hmmm
I would think that it would be very expensive since they would have to ADD mallory metal and alot of it to rebalance for a substantially higher weight piston.
Hmmm, I would think an aftermarket piston would be lighter than a factory slug, and either way not enough to make a substantial difference in bob weight...
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Depends. When I had a stock 5.3 crank balanced I believe the forged pistons of the larger bore (3.838 vs 3.780) were very close to the stock weight of the 5.3 pistons...closer than stock vs stock anyways. I was charged 150 bucks to re balance.
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