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5.9L 24V Performance Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps Related To Performance And Longevity

rpms on vp

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Old Mar 15, 2010 | 08:42 PM
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mainman300's Avatar
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Default rpms on vp
whats safe for rpms? how high can I go without dammage to the valve train? how many rpms are you guies running?
 
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Old Mar 15, 2010 | 08:49 PM
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Bounced it off the redline a few times, and been very close many more times, and havn't broke anything...YET!!!
 
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Old Mar 16, 2010 | 05:54 AM
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If you want to be absolutely safe as far as valvetrain goes, 3200 max. That being said, many have done 4000 on stock springs. If you do it and keep doing it, its a ticking time bomb.
 
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Old Mar 16, 2010 | 08:52 AM
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i was floating valves at about 3600 with over 50psi boost. if the boost was lower it would have been ok at that rpm.
 
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Old Mar 16, 2010 | 09:55 AM
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the most I have hit is 3400 with the hot unlock on the edge but with this new turbo I need more rpms it seems. Thanks
 
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Old Mar 16, 2010 | 11:57 AM
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i pull 4k sled pulling because im a manual i stay in 4th gear and let it eat! ive done about 25 pulls like this and still no problems. (knock on wood).. haha
 
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Old Mar 16, 2010 | 08:47 PM
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Run it out till you hear them start to float then from now on dont go higher than that. I didnt have any problems with 3600rpm and 50psi.
 
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Old Mar 16, 2010 | 09:53 PM
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My truck hit 3495 on the dyno is thats a bad thing?
 
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Old Mar 24, 2010 | 12:18 AM
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Most I saw with a VP44 was 4200RPM's but I have F1 springs.
 
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Old Mar 24, 2010 | 12:39 AM
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Originally Posted by 2141pete
Most I saw with a VP44 was 4200RPM's but I have F1 springs.
thats what I need thanks
 
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