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

how to tell you gov spring are not tight enough

  #1  
Old 09-07-2009 | 06:08 AM
94 12valve's Avatar
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Default how to tell you gov spring are not tight enough

First off I would like to thank lloyd for letting me use his dyno for some dv testing this weekend. I made a total of 5 pulls 2 with the industrial dv's and 3 with a set of full cuts.

On my last dyno in july I made 570 rwhp and 1077 ft/lbs of torque, since that last run I dual feed my 175 pump and changed to a 33x12.5x16.5 tire.

the first run the afc was full back and the 2nd run and 3rd was slid full forward. The 33inch tires ended up costing 19hp

1st run 548 hp and 1001 ft/lbs
2nd run 551 hp and 1022 ft/lbs
3rd run 550 hp and 1028 ft/lbs


the 4th run the afc was full forward with the full cuts added and the 5th was full back with the full cuts


4th run 556 hp and 1039 ft/lbs
5th run 555 hp and 1024 ft/lbs

the full cuts added way more fuel and actually spooled my s465 faster than the industrial dv's did. After talking to lloyd and looking at the dyno sheets we think the 4k I have are cutting the fuel to soon on the top end and I should try a few extra clicks. I didn't get the results I wanted with the full cuts but now I have somewhere else to look.

again I would like to thank lloyd for taking time out of his weekend to help me with my goals ... and I think we both learned a lesson on why you don't wanna stick towels down a stack I will catch fire
 
Attached Thumbnails how to tell you gov spring are not tight enough-dvtest.jpg   how to tell you gov spring are not tight enough-fullcuts.jpg  
  #2  
Old 09-07-2009 | 11:35 AM
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Truck looks good man

you could always go 2 clicks and back your idle down.
 
  #3  
Old 09-07-2009 | 04:00 PM
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thank you ... today I went 2 more clicks and did have to back the idle. next dyno should be sometime in oct so we shall see
 
  #4  
Old 09-13-2009 | 12:59 PM
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what happens if 2 clicks more is 2 much? and how would u no?
 
  #5  
Old 09-13-2009 | 02:22 PM
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the truck would be very touchy to drive... if the springs are to tight the truck will jerk upder light throttle
 
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  #6  
Old 10-03-2009 | 11:49 AM
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well I tried more clicks on the gov springs and that did not help, I ended up just reseting them to what I had before. So I let it sit for a while trying to figure out what else it could be. drove it friday night for the first time in 3 weeks ... the truck ran beter than it ever has before, I found a good size hill and did a 4th gear pull resulting in me spinning my 33x12.5 bfg's at 50 mph. my max boost before friday night was 36 psi, I gained another 19 psi for a total of 55.

other than the outside temp was 15* cooler than the last time I drove it everything else was the same. I think my shut down was not pulling up all the way ( should have checked this a lot sooner).I think this was my problem all along, the shut down must have had a dead spot in it so when the rack tried to advance it could not.
 
  #7  
Old 10-03-2009 | 05:00 PM
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could that dead spot be why mine seems to be hanging up? i have a mechanical shutoff now since i was having solenoid was giving me a fit.
 
  #8  
Old 10-03-2009 | 09:24 PM
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i hate them damn solenoids,
 
  #9  
Old 10-04-2009 | 12:06 PM
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Hate Them?...
Then remove them and go to a cable shutoff instead.I have seen many guys go to them because of the cost of the shutoff solenoids cost when they go bad....
 
  #10  
Old 10-04-2009 | 05:40 PM
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They may be a pain but I don't hate them. I do plan on takeing it out and doing what hammer said.
 

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