5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

main bearing stud size and girdles

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  #1  
Old 01-06-2010 | 12:12 AM
high line's Avatar
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Default main bearing stud size and girdles

have a 12mm mains want to turn to 4000 plus rpms and do it safe. any tips, basically something durable thats not gonna break the bank.

---AutoMerged DoublePost---

sorry 14mm block 96
 

Last edited by high line; 01-06-2010 at 12:12 AM. Reason: Automerged Doublepost
  #2  
Old 01-06-2010 | 07:34 AM
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have you crank, con rods, and pistons balanced together.
 
  #3  
Old 01-09-2010 | 12:09 PM
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Balance the whole rotating assy. When we balance we also do so with the harmonic damper and the flexplate or flywheel on the crank. Better overall result.

I think for 4k you should be fine without a girdle, the main studs is a good idea though.
 
  #4  
Old 01-09-2010 | 12:48 PM
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what do you need for 5000 rpms
 
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Old 01-09-2010 | 05:41 PM
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You can get 5k springs for your pump, But a factory 12mm p-pump turned up with all the goodies is goin to be at its peak for making power at those rpm's. If you were to jump up to a 13mm pump you would bennifit at those higher rpm's. But get everything balanced, run a fluid dampner or ati. You dont really need main studs or a girdle for 4k but for more 12mm main studs and a girdle or block stiffner would work, For what you are doing 14mm main studs would be over kill unless your block takes 14mm already.
 
  #6  
Old 01-10-2010 | 11:35 PM
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mains already 14mm was thinking about a stiffner that goes across oil pan
 




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