What all is needed to run a 400 crank in a M6 Fbody?
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Registered User
Joined: Aug 2000
Posts: 229
From: Glen Burnie, Md
What all is needed to run a 400 crank in a M6 Fbody?
Wondering about the balancing of them. The crank would have to have some Mallory in it to balance it internally. If it was ran wiht a A4 and a weighted flexplate, would there be anythign necessary to do to the flywheel? Stock balancer be fine or have to go wiht something like an ATI or Fluidamper?
Wanna see what wil lmake it work
Registered User
Joined: Mar 2000
Posts: 435
From: Louisiana
Are you talking about an actual 400 SBC chevy crank or an aftermarket 3.75" stroke crank? The factory 400 crank has much larger main journals than the other small blocks. Best bet is an aftermarket 3.75" stroke with 350 mains and a one piece rear seal design.
However there are MANY 3.75" 350 main 2 piece rear seal cranks out there to be had at a very good price. All you'd need is a rear main seal adaptor. Moroso, GM, & many others offer these adaptors.
Steve...
However there are MANY 3.75" 350 main 2 piece rear seal cranks out there to be had at a very good price. All you'd need is a rear main seal adaptor. Moroso, GM, & many others offer these adaptors.
Steve...
Registered User
Joined: Nov 2001
Posts: 2,985
From: In a house by the bay
Sure you can buy a seal adaptor but then the machine shop has to machine the block for it and turn the main journals of the crank ($$).
As Bret mentioned, the $250 Scat crank might even save you a bit of money plus you'll have a rear seal thats less likely to leak.
-Mindgame
As Bret mentioned, the $250 Scat crank might even save you a bit of money plus you'll have a rear seal thats less likely to leak.
-Mindgame
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