12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

turning barrels... good or bad?

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Old 01-13-2012, 12:49 PM
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Default turning barrels... good or bad?

i hear and read alot about turning the barrels on a p-pump.. and im tryin to figure out what exactly it does and weither its good or not? and if its worth doing how is it done..
 
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Old 01-13-2012, 07:38 PM
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Most have good luck with it, some don't. Around 30 to 50 horsepower. I've done two pumps and getting ready to do one tomorrow.
 
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Old 01-13-2012, 09:54 PM
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people say it throws the rack off balance..i want to do it but im just worried that could damage my pump..
 
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Old 01-13-2012, 10:56 PM
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What do u meen buy turning the barrels? Never heard of it thanx
 
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Old 01-14-2012, 12:36 AM
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i would like to know more on this too
 
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Old 01-14-2012, 06:20 AM
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Do a search, this has been gone over alot. If you are scared or can't afford to have the pump worked on if it screws up don't do it.

I talked to a good pump guy about this his take is most pumps are off more than people think. He said even a pump he balances will be off in a year from wear. My 160 pump was smoother with the barrels turned than it was stock.

It's a nice little horsepower boost but not for everyone. It's a simple 20 minute job if done right, a days work and 2 to 400 dollars to fix what you screwed up if done wrong. I'm not trying to discourage anyone just telling it like it is.
 
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Old 01-14-2012, 11:55 AM
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alright.. im probably not gona do it just cause i dont trust myself no to mess up anything in the pump.. and that $2-400 possible repair is something i cant do.. haha.. but thanks for the info man
 
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Old 01-14-2012, 01:07 PM
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i still dont know what there is to repair? there is nothing to break in the process unless you go crazy with the punch and hammer and crack a holder???
 
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Old 01-14-2012, 02:10 PM
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im stuck in the middle about turnin them.. also i pulled a set of stock injectors apart.. is there anything i can do with them myself to make em better or no? just figured id ask since i have em apart..
 
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Old 01-16-2012, 06:58 AM
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The one that was on here I think broke the gasket between the barrel and pump is what he thought happened. I don't see it happening very often but if it happens it's going to cost. I'm not scared to do it but I am able to except the worse case senerio.
 


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