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

Injectors???

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  #21  
Old 01-31-2011, 03:03 PM
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TThe guys at Sdx said the 7x9s were about 100hp and the 5x12s were 90
 
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  #22  
Old 01-31-2011, 06:27 PM
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Originally Posted by shortbusdriver
The dyno mentioned earlier was a 5x.014" vco nozzle vs a 7x.010" cylindrical blind hole, both with stock pintles. They do not offer a 5 hole cylindrical blind nozzle, at least not one that is not custom machined.

I never said a 7x.010" will outflow a 5x.014". The 7x.010" will flow less but it does seem to make decent power, despite being smaller. Some testing has also been done with a set of DDP4's vs SDX 5x.014" vco with lift vs 7x.012" w/out lift. The 7 hole injectors had less haze and had a significant increase in power vs both 5x.014" nozzles. There is still much more testing to be done with various 7 hole nozzles.
I'm still not sold on the 7 hole injectors being better than the 5 hole. the test you mentioned about the ddp vs the sdx vs the 7 hole test really doesnt mean much ... sounds more like a sales pitch to me
 
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  #23  
Old 01-31-2011, 07:02 PM
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You can call it whatever you want. Im just stating what has been done so far.
 
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  #24  
Old 02-01-2011, 12:52 PM
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Dynoing injectors back to back is almost a complete waste, especially when all three sets are different nozzle type and cone angle. The 7-hole Denso nozzles do work and have their place, but for big hp I don't see anything taking place of the 5-hole nozzles.
 
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  #25  
Old 02-01-2011, 12:58 PM
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Default Injectors???
Can u put a 12v cummins motor back in a 96 truck with the head and valve covers on or do you have to jack the cab up for it to fit. I took it out with the head off no problem but a tight fit.


Brandon
 
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  #26  
Old 02-01-2011, 02:55 PM
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Originally Posted by Flight911
Can u put a 12v cummins motor back in a 96 truck with the head and valve covers on or do you have to jack the cab up for it to fit. I took it out with the head off no problem but a tight fit.


Brandon
kinda off topic ... but yes you can put the motor back in with the head on, the valve cover have to be off tho. its a pain but you can do it
 
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  #27  
Old 02-01-2011, 05:03 PM
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Originally Posted by Smokem
Dynoing injectors back to back is almost a complete waste, especially when all three sets are different nozzle type and cone angle. The 7-hole Denso nozzles do work and have their place, but for big hp I don't see anything taking place of the 5-hole nozzles.
What about for a non vco nozzle larger than a 5x18 since the sac volume is larger?
 
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  #28  
Old 02-01-2011, 05:42 PM
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I never cut one apart to see just how large the internal volume is, if it were 5-hole I would have. There are large sac 5-hole nozzles that are used from a few larger Cummins applications, but the intermediate disks must be modified to use them.
 
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  #29  
Old 02-01-2011, 08:18 PM
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The one I cut apart was a cylindrical blind-hole design and the sac diameter is about .010" wider on the 7 hole nozzle then the 5 hole micro blind, so I had thought about using it for the larger injectors since the micro blind 5 holes have the smaller volume.

What type of modifying is done to the intermediate disks? I am trying to find some sac nozzles to use in the larger pulling applications so I am really interested in what you are comming up with. Im guessing this is the stuff you were talking about on the phone when you mentioned that no one has really done before.
 
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  #30  
Old 02-01-2011, 09:25 PM
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It's an 8.3L pencil nozzle, pain in the you know what, I don't like doing them since the alignment pins must be removed on the nozzle side of the disk. I am having a few nozzles printed this month, hopefully making it into production by late spring, been a long time coming.
 
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