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Old 05-04-2010, 11:01 PM   #1
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knife edge crank with jrsc and stock SVT internals?

so my motor is going to a machine shop to get rebuilt and i'm thinking of having some "extra" work done while it's there. is it advisable to knife edge the crank with stock SVT internals and boost? A 3 angle valve job is also on the list and that I know is nothing but a good thing.


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Old 05-05-2010, 07:29 AM   #2
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From what I've read, it is not adviseable to get the crank knife edged. Just get your bottom balanced. Good Luck with the rebuild. The angle job yes.
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Old 05-05-2010, 08:28 AM   #3
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There have been a few knife-edged cranks around the forums and haven't read of any problems or failures. What's wrong with it?
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Old 05-05-2010, 08:30 AM   #4
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ehhh some people say that it throws the crank out of balance.......ive known a few people to do it in other types of cars (DSMs and F-Bodys) and they havent had any problems
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Old 05-05-2010, 08:33 AM   #5
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Ok so nix the knife edge. Balance and a valve grind it is.
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Old 05-05-2010, 09:50 AM   #6
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Quote:
Originally Posted by rameans23 View Post
ehhh some people say that it throws the crank out of balance.......ive known a few people to do it in other types of cars (DSMs and F-Bodys) and they havent had any problems
Lighter pistons and rods would help offset that, no?
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Old 05-05-2010, 10:23 AM   #7
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i think it would have more to do with not taking the same amount off of the counterweights, make sure that they balance it after they knife edge it
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Old 05-05-2010, 10:30 AM   #8
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If you have a gram scale, you can catch all (err... most, is more like it) of the removed metal for each counterweight and weigh them.
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Old 05-05-2010, 10:47 AM   #9
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true a good machine shop should have no problem doing it and getting it balanced
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Old 05-05-2010, 11:39 AM   #10
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Well it's all out the window anyhow. Just got off the phone with the shop. They want over 3k to rebuild the block. I'm just gonna go with a built one from cfm for less. Lol
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