Duramax Diesels Forum Truck of the Week
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Old 02-13-2017, 05:08 PM
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Default 12mm Exergy ??

All last year on my lb7 W/S puller I used a 12mm cp3 with II 70% over nozzles on a set of injectors with probably 50000 miles on them. I would drop rail pressure at 2600 pulse down to18k psi when commanding 26k. I know guys run bigger injectors with this pump just don't see how when it won't keep up with my 70. Question is what kind of pulse on what size injector are you guys running with Exergys 12mm pump?
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Old 02-13-2017, 05:27 PM
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Whenever someone says II parts I instantly know the answer to there problems.......


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Old 02-13-2017, 05:30 PM
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That would be the reason I am asking what size injector will the pump support because I suspect the injectors could be the issue. I am replacing them before next season but was unsure what size to order.
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Old 02-13-2017, 05:48 PM
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I believe Mark has pushed 400% over injectors with a 12mm. But I know for certain he has ran a 12mm with 250% overs without issue.


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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)
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Old 02-13-2017, 05:58 PM
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I ran a single 12mm with 200% in the puller last yr with no rail issue problems
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Old 02-13-2017, 06:05 PM
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Wow what kind of pulse width?
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Old 02-13-2017, 06:58 PM
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I would have to check with mark but I believe he kept it around 2800-3000
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Old 02-15-2017, 05:48 AM
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12 mm will support 1200hp. To maintain rail you may need some PID adjustments but it should work just fine.


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Old 02-15-2017, 06:42 AM
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Quote:
Originally Posted by IOWA LLY View Post
Whenever someone says II parts I instantly know the answer to there problems.......


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No offense but I'm with this guy and had the same thought! If you don't have an outside source issue (high returns or restricted supply pressure etc.)then you will have no problem keeping up with them. A single 12mm cp3 is capable up to 1400hp if you actually have the air to do it. My motor with Exergy 250%inj and a single 12mmcp3 on 1850ish pulse made 1300++hp on a big single at the crank.
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06 LBZ "White Lightning" 2wd rclb DP built motor Carillo, 15.25:1 "Finger" Oval Pistons w/reliefs, Socal Titanium upgraded springs on Stock heads w/Socal Billet injector holddowns,ARP, head-main-rocker studs,Soca Billet mains& Dampner, Chromoly pushrds, DP B72mmstg2R1VGT/StainlessDiesel S472/87 1.0SS triples, DHD Cast SuperHighflow intake, Exergy 14mmCP3 & 250%inj,Fass, PPE Race Valve PPE Manifolds, Banks Technicooler, AFE Boost tube, SC GMax6 Goerend "G" Grizzly Locker 3.42 gears, 1198+++hp 2k+ftlbs
Current fastest pass 1.520 60ft 6.705@108.95mph 1/8th 10.242@140.11mph
159.8mph in standing 1/2mile
Made it on fastest DMax list with Single VGT and single cp3 fuel only! 1.589 60ft 6.9291@103mph 1/8th 10.96@127.76mph
Stock motor best 11.277@119mph B68mmStg2R 250%inj 12mmcp3

Wife's tow rig-08 LMM SierraHD SLT2 "Stormy" CCSB murdered out B68mm Stg2R
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Old 02-15-2017, 06:44 AM
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Quote:
Originally Posted by pornstar dancin View Post
I would have to check with mark but I believe he kept it around 2800-3000
Dustin, you are about 1000us high buddy!
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06 LBZ "White Lightning" 2wd rclb DP built motor Carillo, 15.25:1 "Finger" Oval Pistons w/reliefs, Socal Titanium upgraded springs on Stock heads w/Socal Billet injector holddowns,ARP, head-main-rocker studs,Soca Billet mains& Dampner, Chromoly pushrds, DP B72mmstg2R1VGT/StainlessDiesel S472/87 1.0SS triples, DHD Cast SuperHighflow intake, Exergy 14mmCP3 & 250%inj,Fass, PPE Race Valve PPE Manifolds, Banks Technicooler, AFE Boost tube, SC GMax6 Goerend "G" Grizzly Locker 3.42 gears, 1198+++hp 2k+ftlbs
Current fastest pass 1.520 60ft 6.705@108.95mph 1/8th 10.242@140.11mph
159.8mph in standing 1/2mile
Made it on fastest DMax list with Single VGT and single cp3 fuel only! 1.589 60ft 6.9291@103mph 1/8th 10.96@127.76mph
Stock motor best 11.277@119mph B68mmStg2R 250%inj 12mmcp3

Wife's tow rig-08 LMM SierraHD SLT2 "Stormy" CCSB murdered out B68mm Stg2R
06 GP GXP 5.3L StealthGray Metallic
http://www.danvilleperformance.com
http://www.youtube.com/markbroviakdp
http://www.youtube.com/channel/UCV6K...?feature=watch
Mark@DanvillePerformance.com
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Old 02-15-2017, 06:58 AM
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Well there you go kyle I knew mark would chime in
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Old 02-15-2017, 07:04 AM
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I was pretty close!!
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Old 02-15-2017, 08:57 AM
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also have marks tuning here. I have 100%s and a exergy 12mm and mark has my big tune around 2800uS and holds rail fine.
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Old 02-17-2017, 08:02 AM
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Thanks for the info guys. I would think if it was a high return rate I would also have a hard start. Either way I will be getting new injectors probably around 80%. Hoping I can run a 2600us with this pump and not drop any rail pressure.
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Old 02-17-2017, 08:09 AM
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Quote:
Originally Posted by greendury View Post
Thanks for the info guys. I would think if it was a high return rate I would also have a hard start. Either way I will be getting new injectors probably around 80%. Hoping I can run a 2600us with this pump and not drop any rail pressure.
Go bigger. That pump won't have any issues with 150s or 200s. The tuning is so good that there aren't many drawbacks to stepping up the size.
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