1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

12 Valve lope..?

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Old Feb 2, 2012 | 10:24 AM
  #1  
randall89d350's Avatar
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Default 12 Valve lope..?

i seen a vid on youtube and it seemed to be legit of a 92 W250 12V that was loping... is that even possible? or how is it done if it is?
 
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Old Feb 2, 2012 | 11:25 AM
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Not a true lope, something wrong or **** poor setup.
 
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Old Feb 2, 2012 | 11:55 AM
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yeah. dont even try to get ur truck to do it. its a very bad subject to bring up on here.
 
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Old Feb 2, 2012 | 12:29 PM
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Lol
 
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Old Feb 2, 2012 | 01:48 PM
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hey i aint sayin i liked it i was just sayin it was wierd as all high hell i didnt realize it was possible to do.
 
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Old Feb 2, 2012 | 01:50 PM
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oversized fuel lines will do that
 
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Old Feb 2, 2012 | 01:56 PM
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i was thinkin it was somethin with degreein the cam maybe? i dunno i might just be showin my ignorance by sayin that tho. aint really did much with my truck yet.
 
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Old Feb 2, 2012 | 01:58 PM
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i have yet to see a cam in a diesel engine make it lop normally it makes it run smother unlike a gas engine
 
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Old Feb 2, 2012 | 02:20 PM
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degreeing the cam just ensures its in propper phase with the crank. Aftermarket cams dont affect lope in a direct injected diesel. Most performance diesel cams arent cut as radical as gassers are, there are alot of different factors involved between diesel and gas camshafts. From what ive seen on p pump trucks the mods done to the pump make a lope and when running oversized injection lines, idk about ve mods to make one lope. I do know if you have a lope and you like it, better not ever send the pump out to a pump shop because they will adjust the lope out of it. Had a loping p pump 24v here, sent the pump out to be calibrated for 5k rpm and it never loped again.
 
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Old Feb 2, 2012 | 02:24 PM
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good info
 
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