Crankshaft turning maximum - Team Camaro Tech
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post #1 of 8 (permalink) Old Jul 25th, 09, 01:28 AM Thread Starter
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Mark
 
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Crankshaft turning maximum

I pulled a main bearing on my 454 that needs a rebuild and its already has .20 and rod bearings .10. I am planning a pretty much stock rebuild and was wondering how far you can turn the crank down. .30 is not excessive, right? Just want this motor to get me though until I got the cash for my blower motor build.

Mark
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post #2 of 8 (permalink) Old Jul 25th, 09, 05:36 AM
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Re: Crankshaft turning maximum

You can turn the crank down as far as you can get bearings for. There are cranks with the mains turned down .200"+ operating in many old 383 builds.

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post #3 of 8 (permalink) Old Jul 25th, 09, 11:30 PM
 
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Re: Crankshaft turning maximum

I want to say that we can buy BB .100" under, but I don't know if they are still being sold??

But 2.100" SB rod bearings used on BB cranks is done!

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post #4 of 8 (permalink) Old Jul 26th, 09, 12:46 AM Thread Starter
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Re: Crankshaft turning maximum

Alright, Thats good to hear. I ment my current bearings were .02 & .01, hope i didnt confuse anybody.

Mark
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Current : 1967 Coupe w/350, 2010 2SS

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post #5 of 8 (permalink) Old Jul 26th, 09, 06:19 AM
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Don
 
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Re: Crankshaft turning maximum

Quote:
Originally Posted by dragon0123 View Post
Alright, Thats good to hear. I ment my current bearings were .02 & .01, hope i didnt confuse anybody.
.020 & .010 are not the same as .02 & .01

Don
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post #6 of 8 (permalink) Old Jul 26th, 09, 07:35 AM
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Re: Crankshaft turning maximum

actually .020 & .010 are the same as .02 & .01........I think you meant .020 & .010 are not the same as .20 & .10.

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post #7 of 8 (permalink) Old Jul 26th, 09, 08:57 AM
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Re: Crankshaft turning maximum

Quote:
Originally Posted by bowtie1Z28 View Post
actually .020 & .010 are the same as .02 & .01........I think you meant .020 & .010 are not the same as .20 & .10.
Phew, for second there, I thought they had changed the rules!!!! Or some gov't hack who jumbles statistics to make programs look better than they are got his hands on the laws of mathematics!!!!




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post #8 of 8 (permalink) Old Jul 26th, 09, 10:30 AM
 
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Re: Crankshaft turning maximum

And don't forget that our forged crank SB's run the Honda 1.88" size or whatever the rod bearings are up around 9,000 rpm in Super Mini P/U Speedway racing if not mistaken.

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