Duramax Diesels Forum Truck of the Week
  #31  
Old 06-14-2017, 02:27 AM
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Quote:
Originally Posted by IOWA LLY View Post
I'll bet it has to do with the red man mod. I'll bet if they were honest with you they'd tell you why it happens. I highly doubt they aren't aware of the issue.


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I mean we're happy with the injectors. Make great power and everything. Just burnt 5-6 pulls last year figuring that issue out.

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  #32  
Old 06-14-2017, 06:43 AM
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That's still disappointing though. There's a lot of potential horsepower in rail pressure in my experience.


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  #33  
Old 06-14-2017, 06:52 AM
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Quote:
Originally Posted by IOWA LLY View Post
That's still disappointing though. There's a lot of potential horsepower in rail pressure in my experience.


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I agree with this after what I saw tuning mine on the dyno.
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  #34  
Old 06-14-2017, 07:30 AM
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It would run fine in the upper 28xxx's iirc, which is 195-197mpa. So not like it's low or anything. I'd be interested to know the cutoff​point catman. Assuming you can just make more & more. What ECM? LLY?

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  #35  
Old 06-14-2017, 08:40 AM
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Quote:
Originally Posted by 04jimc View Post
It would run fine in the upper 28xxx's iirc, which is 195-197mpa. So not like it's low or anything. I'd be interested to know the cutoff​point catman. Assuming you can just make more & more. What ECM? LLY?

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yes LLY and we'll soon find out.
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2005 2500HD dmax, CCSB, 4" exhaust, Built motor with Carillo's .020 over 16:5.1 piston with .075 reliefs, Socal 6480 alt fire cam, ported LBZ head's, Exergy 10MM pump Stock lly cp3 on the belt, 400% LBZ injectors, S471/87 compounded with a GT5541R 106MM Fleece billet charger Werhli fab S400 install kit with bridge and piping, Merchant Auto Billet push tubes, Socal Valve springs, Socal valve covers, Socal flex plate, Mishimoto black intercooler, DSP5, Air dog 165,

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  #36  
Old 06-14-2017, 08:41 AM
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Quote:
Originally Posted by 04jimc View Post
It would run fine in the upper 28xxx's iirc, which is 195-197mpa. So not like it's low or anything. I'd be interested to know the cutoff​point catman. Assuming you can just make more & more. What ECM? LLY?

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So just to make sure I understand you correctly, you have logs of the ECM still fully fueling when it shuts down? You saying the something in the injector physically quits flowing fuel when the pressure goes to high right?

Your asking about what ECM catman is running just made me second guess myself.


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2003 GMC CCSB LLY
Built by me, tuned by me.

2009 ECI Diesel Truck Points Champion
2010 ECI Diesel Truck Points Champion
2011 ECI Diesel Truck Points Champion
2012 ECI Diesel Truck Points Champion

Big thanks to everyone who helps me.

Best 1/8th, 7.29, 98.6MPH (Street tires, fuel only, single Journal bearing GT42 charger) (2010)

Best 1/8th, 6.93, 104.24MPH (Street tires, fuel only, single HX60 turbo) (2016)

Best 1/8th, 6.60, 106.6MPH (Street tires, fuel only, single HX60 turbo) (2017)
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  #37  
Old 06-14-2017, 08:43 AM
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Quote:
Originally Posted by IOWA LLY View Post
So just to make sure I understand you correctly, you have logs of the ECM still fully fueling when it shuts down? You saying the something in the injector physically quits flowing fuel when the pressure goes to high right?

Your asking about what ECM catman is running just made me second guess myself.


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Yes. Only change in log when it happens is the rpm dying​ off
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  #38  
Old 06-14-2017, 09:17 AM
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Quote:
Originally Posted by IOWA LLY View Post
So just to make sure I understand you correctly, you have logs of the ECM still fully fueling when it shuts down? You saying the something in the injector physically quits flowing fuel when the pressure goes to high right?

Your asking about what ECM catman is running just made me second guess myself.


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Quote:
Originally Posted by 04jimc View Post
Yes. Only change in log when it happens is the rpm dying​ off
That's why I asked about if you saw actual rail pressure drop or spike....if you didn't then I will go out on a limb and say it had nothing to do with the injector.
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  #39  
Old 06-14-2017, 09:35 AM
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Quote:
Originally Posted by juddski88 View Post
That's why I asked about if you saw actual rail pressure drop or spike....if you didn't then I will go out on a limb and say it had nothing to do with the injector.


So why did it die? What's your explanation?


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2003 GMC CCSB LLY
Built by me, tuned by me.

2009 ECI Diesel Truck Points Champion
2010 ECI Diesel Truck Points Champion
2011 ECI Diesel Truck Points Champion
2012 ECI Diesel Truck Points Champion

Big thanks to everyone who helps me.

Best 1/8th, 7.29, 98.6MPH (Street tires, fuel only, single Journal bearing GT42 charger) (2010)

Best 1/8th, 6.93, 104.24MPH (Street tires, fuel only, single HX60 turbo) (2016)

Best 1/8th, 6.60, 106.6MPH (Street tires, fuel only, single HX60 turbo) (2017)
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  #40  
Old 06-14-2017, 10:21 AM
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I'll attach a log tonight

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08 GMC CC DRW-Gone
New DD/Beater: Beat up 06 GMC CCSB w/ 252,000 miles
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now Better'- PPL Lim Pro Stock 05 3500 Crew Cab 158" WB 2014 PPP 2.6 Champions
Thanks to Blackout Performance

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  #41  
Old 06-14-2017, 02:41 PM
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I am not able to upload a log file?
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06 GMC CC DRW-Gone
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New DD/Beater: Beat up 06 GMC CCSB w/ 252,000 miles
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Thanks to Blackout Performance

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  #42  
Old 06-14-2017, 02:58 PM
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You may have to zip it in a folder.
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  #43  
Old 07-11-2017, 01:26 PM
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I've got my 36K rail sensor now, any insight on scaling the table to make it read correct? set the 5 vole cell at 36K and blend it?
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2005 2500HD dmax, CCSB, 4" exhaust, Built motor with Carillo's .020 over 16:5.1 piston with .075 reliefs, Socal 6480 alt fire cam, ported LBZ head's, Exergy 10MM pump Stock lly cp3 on the belt, 400% LBZ injectors, S471/87 compounded with a GT5541R 106MM Fleece billet charger Werhli fab S400 install kit with bridge and piping, Merchant Auto Billet push tubes, Socal Valve springs, Socal valve covers, Socal flex plate, Mishimoto black intercooler, DSP5, Air dog 165,

1986 K10 short bed LQ4/4L80E

1984 CJ7 Powered by a 2000' LS1 5.7L



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  #44  
Old 11-18-2017, 09:32 PM
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Bumping this up.

What did you find out?

I have a 2000 bar rail sensor off a 6.7 Cummins sitting here, wondering if it would be beneficial and if anyone has done it.
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  #45  
Old 11-19-2017, 08:53 AM
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Quote:
Originally Posted by S Phinney View Post
Scale is completely linear.


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I looked at the 6.7 voltage scale, and this is correct, goes straight from 0mpa @ .5v to 200mpa @ 4.5v. A stock LLY table is linear also, just a lot more plotting.
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