CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

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CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  10SHOTS on April 1st 2012, 11:12 pm

I was checking the crank thrust today on my a-460 block and eagle crank today and noticed the crank rubs the main saddle and cap on #4 main front of block side What the hell.has any one else seen this? whats the fix, mill the cap? grind the block? defective? normal?


Last edited by 10SHOTS on April 2nd 2012, 9:23 am; edited 1 time in total
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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  bosshoss on April 2nd 2012, 12:52 am

Had the same problem with a Scat 4.5 crank in an A460 block. Had to do a bit of grinding on the block.

dkp
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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  DanH on April 2nd 2012, 2:17 am

early Scat cranks had a wider space between the counter weights for # 2 and 4 mains , fit OK. late Sact crank is different , narrower in that area .
caps won't be even with the block , have a overhang either to front or rear . lucky if you get a block with no overhang

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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  bruno on April 2nd 2012, 7:27 am

i believ my rpm deal was the same issue
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crank or block

Post  10SHOTS on April 2nd 2012, 9:28 am

so is it the crank or the block causing the issues? or both lol
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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  dfree383 on April 2nd 2012, 9:32 am

The Crank, I have not had issues with my Bryant or my Scat ones.
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crank rubs

Post  10SHOTS on April 2nd 2012, 9:59 am

so do i work on the block or get a new crank and try it again
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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  DanH on April 2nd 2012, 10:39 am

10SHOTS wrote:so do i work on the block or get a new crank and try it again
work the block

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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  Paul Kane on April 2nd 2012, 2:27 pm

10SHOTS wrote:so is it the crank or the block causing the issues? or both lol
I don't think it should be look at that way. Simply put, this is an accepted part of custom engine building. You are not building a "plug-and-play" engine, you are setting up the fine details of the combniation as it best suits your speicific build.

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fixed

Post  10SHOTS on April 2nd 2012, 2:42 pm

machined the block,fixed now


Last edited by 10SHOTS on April 17th 2012, 12:39 pm; edited 2 times in total
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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  bosshoss on April 2nd 2012, 2:47 pm

Has the crank been balanced yet?

dkp
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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  10SHOTS on April 2nd 2012, 2:50 pm

bosshoss wrote:Has the crank been balanced yet?

dkp
no why? just laid the crank in the block and spun it to see what all needed to be ground on
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Re: CRANK SHAFT RUBS A-460 BLOCK MAIN SADDLE

Post  bosshoss on April 2nd 2012, 8:36 pm

Any material you remove from the crank will affect the balance situation. If it had already been done then you have to check it again after removing material.

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