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04-29-2018, 06:52 PM
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#1
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Name: Vincejax
Title: Too Much Time
Status: Not Here
Join Date: Apr 2018
Member`s Gallery
Posts: 325
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13mm pump, low power
I have a street/race truck with a 175hp pump with 13mm p+b, 7mm DV, 5x22 injectors, haisley5k governor springs. Since going to 13mm p+b (only recent change) pump has been down ~150 hp. I have experimented with and checked the obvious variables. Ran timing from 20*-30*, fuel supply pressure 42psi at wot, functioning afc, properly adjusted shutoff solenoid, verified rack travel. tightened gov springs tight as I can get them. I saw slight variations in performance when I changed some variables but not matter what the truck is strong staging and spooling and to about 2500rpm but falls flat and wont even got to 4000rpm under load. free revs to 5000 no problem. There is more info I hvent listed but feel free to ask. Thank you in advance for any help or advice!
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04-29-2018, 07:40 PM
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#2
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Name: 95cummins5.9
Title: Old man ***** gossiper
Status: Not Here
Join Date: Jun 2012
Location: U.S.A
Member`s Gallery
Posts: 4,715
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Quote:
Originally Posted by Vincejax
I have a street/race truck with a 175hp pump with 13mm p+b, 7mm DV, 5x22 injectors, haisley5k governor springs. Since going to 13mm p+b (only recent change) pump has been down ~150 hp. I have experimented with and checked the obvious variables. Ran timing from 20*-30*, fuel supply pressure 42psi at wot, functioning afc, properly adjusted shutoff solenoid, verified rack travel. tightened gov springs tight as I can get them. I saw slight variations in performance when I changed some variables but not matter what the truck is strong staging and spooling and to about 2500rpm but falls flat and wont even got to 4000rpm under load. free revs to 5000 no problem. There is more info I hvent listed but feel free to ask. Thank you in advance for any help or advice!
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You pull the afc and try it yet?
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04-29-2018, 09:07 PM
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#3
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Name: Vincejax
Title: Too Much Time
Status: Not Here
Join Date: Apr 2018
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Posts: 325
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Quote:
Originally Posted by 95cummins5.9
You pull the afc and try it yet?
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Yes, much more low end smoke but same lack of power and smoke at high rpm issue.
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04-29-2018, 10:04 PM
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#4
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Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
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Posts: 769
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What’s egts like? And how many CC are you running
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
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04-30-2018, 06:26 AM
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#5
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Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
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Posts: 4,395
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Have any of y'all ever heard of a 13mm pump being built with the D profile cam? From a 160/175 hp pump.
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04-30-2018, 06:51 AM
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#6
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Name: zachu812
Title: Too Much Time
Status: Not Here
Join Date: Apr 2016
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Posts: 419
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Subbed, I've been chasing a similar issue with a 13mm pump on my 24 valve, 903 cam pump though.
__________________
1995 RCLB 4x4: H-pump, 5x.012s, HX35
2001 RCLB 4x4: H-pump, 6x.013s, S472/S488
EdzGarage, Matt's Diesel Supply, HTS Transmissions
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04-30-2018, 07:11 AM
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#7
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Name: YOUNG GUNS15
Title: Im AWESOME!!!!
Status: Not Here
Join Date: Sep 2009
Location: Utah
Member`s Gallery
Posts: 7,346
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I’d really question the 7mm delivery valves
Sent from my iPhone using Tapatalk
__________________
Spence
-1994 4x4 12 valve 13mm, single 475 748/1292 Fuel 872/1470 N2O
-2005 4x4 12 valve CCSB 3rd gen '12-rail' 280hp
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04-30-2018, 08:51 AM
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#8
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Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,395
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Also on his truck that I've noticed is just how quiet it is, at 30* timing and how it sounds at idle and thru the rpm range.
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04-30-2018, 09:35 AM
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#9
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Name: turbo2387
Title: Nipple Fluffer
Status: Not Here
Join Date: Jun 2011
Location: Indiana
Member`s Gallery
Posts: 665
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used pump or built for you?
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04-30-2018, 09:38 AM
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#10
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Name: Vincejax
Title: Too Much Time
Status: Not Here
Join Date: Apr 2018
Member`s Gallery
Posts: 325
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Quote:
Originally Posted by mfsuper90
What’s egts like? And how many CC are you running
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easily pegs 1500 egt gauge with clean exhaust about 2600-2800rpm. 600cc@ 16mm rack travel, but It really seems as though the pump is not fueling that amount.
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04-30-2018, 09:41 AM
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#11
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Name: Vincejax
Title: Too Much Time
Status: Not Here
Join Date: Apr 2018
Member`s Gallery
Posts: 325
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Quote:
Originally Posted by turbo2387
used pump or built for you?
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Same pump I have been running for several years, recently rebuilt and added bosch 13mm p+b.
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04-30-2018, 12:44 PM
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#12
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Name: Yotadzl
Title: Diesel Enthusiast
Status: Not Here
Join Date: Feb 2016
Location: Oregon
Member`s Gallery
Posts: 234
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It sounds like the pump isn't fueling like it should be. It may be time to pull it off and have it checked by the fuel shop to be sure it's working like it should be. Are you running stock injector lines?
__________________
'85 Yota Crawler-2l diesel, custom built VE (by me), custom T25 turbo. Slow but fun!
'95 Cummins grampa truck, embarrassingly stock
'12 Cummins, deleted
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04-30-2018, 02:34 PM
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#13
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Name: mfsuper90
Title: 300ft is all I need
Status: Not Here
Join Date: Feb 2013
Location: Southeast ohio
Member`s Gallery
Posts: 769
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What turbos are you running to clean up 600cc? That’s a lot of fuel, if in fact it’s putting out that much
__________________
’82 300D benz Bosch MW turned up, HX30, W/A Intercooler
MF Super 90 various odds and ends done. Farm stocker
MF 98 3-71 screaming jimmy. Needs N90's. Another farm stock
'14 Ram Anarchy EFI, G56
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04-30-2018, 03:11 PM
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#14
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Name: GRotman
Title: Chief Indian
Status: Not Here
Join Date: Jul 2006
Location: Allendale,Mi
Member`s Gallery
Posts: 2,516
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Sounds like it needs more supply pump.
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04-30-2018, 03:18 PM
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#15
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Name: Vincejax
Title: Too Much Time
Status: Not Here
Join Date: Apr 2018
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Posts: 325
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Quote:
Originally Posted by mfsuper90
What turbos are you running to clean up 600cc? That’s a lot of fuel, if in fact it’s putting out that much
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62/68 .7 T3 over 75/96 1.32 T6...pump is definitely not putting out 600cc, thats my issue. Truck is making less power than it did before at 425cc.
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04-30-2018, 03:19 PM
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#16
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Name: Vincejax
Title: Too Much Time
Status: Not Here
Join Date: Apr 2018
Member`s Gallery
Posts: 325
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Quote:
Originally Posted by GRotman
Sounds like it needs more supply pump.
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Supply pressure to injection pump is at 50psi and drops to 42psi at WOT.
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04-30-2018, 04:11 PM
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#17
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Name: turbo2387
Title: Nipple Fluffer
Status: Not Here
Join Date: Jun 2011
Location: Indiana
Member`s Gallery
Posts: 665
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If nothing has changed in your setup other than the swap to a 13mm and it runs like crap. Take it back and have them make it right. Knocking tamperproof paint off from every screw will only make it harder for you to plead your case.
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04-30-2018, 04:17 PM
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#18
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Name: turbo2387
Title: Nipple Fluffer
Status: Not Here
Join Date: Jun 2011
Location: Indiana
Member`s Gallery
Posts: 665
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Also... i would hate to be your secondary.
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04-30-2018, 05:47 PM
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#19
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Name: Vincejax
Title: Too Much Time
Status: Not Here
Join Date: Apr 2018
Member`s Gallery
Posts: 325
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Quote:
Originally Posted by turbo2387
If nothing has changed in your setup other than the swap to a 13mm and it runs like crap. Take it back and have them make it right. Knocking tamperproof paint off from every screw will only make it harder for you to plead your case.
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This thread is about finding out what specific mechanical adjustments need to be made to my pump to fix a hugh rpm fueling issue. "Make it right" doesn't mean anything. I welcome any and all helpful or thoughtful advice on this. But telling me to take it to someone else to fix it doesn't get me any closer to figuring out what is actually the problem. Also, this punp hasnt had any tamperproof screws left on it in years.
I should also add that the pump runs great other than the high rpm fueling issue. Very easy startup and smooth idle, doesn't bog down in gear, etc.
Last edited by Vincejax; 04-30-2018 at 06:00 PM.
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04-30-2018, 06:00 PM
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#20
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Name: turbo2387
Title: Nipple Fluffer
Status: Not Here
Join Date: Jun 2011
Location: Indiana
Member`s Gallery
Posts: 665
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So put it on you own personal test stand and figure it out. Thats all im saying. We can tell you how its fueling and why because we arnt looking at it on a stand. It has an afc problem causing it to not have full rack travel or it has a mechanical issue that isnt it allowing it fuel or a govoner is hung or what have you that no amount of guessing will cure.
Again if the only thing that has changed is the pump.
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