400 ??'s
Thread Starter
Supreme Member
Joined: Oct 2000
Posts: 3,245
Likes: 812
From: Park City, UT
Car: '92 Corvette, '89 1/2-a-'Vette
Engine: LT1, L400
Transmission: ZF6, T5
Axle/Gears: 3.45, 3.31
400 ??'s
Are the balancing requirements for a 400 w/5.5" rods be different than a 400 w/5.7er's?? Thanks
Senior Member
iTrader: (1)
Joined: Oct 2003
Posts: 652
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From: Montgomery, AL
Car: 1985 Trans Am
Simply, yes. When you change the rod length, it changes the rotational mass. Factory 400 cranks are balanced to the shorter rod length, changing the length requires rebalancing if you are looking to get any longevity out of the engine.
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