Hit the track today in my "new to me Lmm" something is off

Dirtywhitelmm · 11-25-2012, 03:27 PM

First off mods are mpi stock over s480, 100hp ddps, 120 over II double dragon pump, ppe up pipes and manifolds, ad 165,Sdp intercooler pipes, cognito 4 inch lift," all the way down to the bump stops" cognito braces and tie rods, traction bars, 305/55 20 cooper zeons, Ppe stage 5 trans- precision ml converter EFI tuned by Rob
Ok sorry haven't updated my sig
Anyway on the big tune leaving at 10lbs of boost cut a 1.728 60' ft
1/8 mile 7.915 @ 85.08
1/4 mile 12.548 @ 103

Expected a little more and in my opinion the 1/4 mile mph is way off for the time any opinions on what might be wrong, my guess is rail pressure. Didn't have my v2 to log so I guess it's kind of a shot In the dark because I'm sure y'all will say get rob to check the log but let me know what y'all think
Thanks

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mike diesel · 11-25-2012, 03:53 PM

Whats your location/altitude? My guess would be that rob has some extremely conservative tuning on it to keep those poor lmm pistons alive. You have alot of fuel and air potential that will easily destroy your stock bottom end.

**WVRigRat05** · 11-25-2012, 03:58 PM

Id rape it just so I had to build it. Im puttin twins on mine(S475 over stock), almost certian Ill trash the rods and have to do surgery again with carillos.

Dirtywhitelmm · 11-25-2012, 04:02 PM

The truck was tuned for the first owner In Ohio I'm in eastern Georgia 330 to 360 above sea level

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Dirtywhitelmm · 11-25-2012, 04:03 PM

Quote:

Originally Posted by mike diesel

Whats your location/altitude? My guess would be that rob has some extremely conservative tuning on it to keep those poor lmm pistons alive. You have alot of fuel and air potential that will easily destroy your stock bottom end.

And yeah i was told it was detuned for the pistons I just didn't think I would see so much of a drop I'm mph on the big end

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**lutzjk913** · 11-25-2012, 04:05 PM

Is this nick's old truck?

Hondarider552 · 11-25-2012, 04:08 PM

Why do you think its rail pressure? Do you have a log of the run?

Somethings wrong, I ran 107mph on stock LBZ.

**lutzjk913** · 11-25-2012, 04:12 PM

Did it feel like it layed over in the higher gears? Maybe a converter problem.

plowboy_lbz · 11-25-2012, 04:22 PM

you had a good 60 ft time for having a lift kit. i would think that your tuning is what is holding your back. ever been on a dyno?? i'm not a fan of II pumps, but it should be able to keep up. you have more than enough potential to blow your shit up!!

**WVRigRat05** · 11-25-2012, 04:25 PM

Big tires will kill it some too. Mines a horse when unloaded but still not a fast as a truck with less mods and smaller tires. I'd go back to 33's but then I'd be wound for sound. you def. benefit for smaller tires with the 6 speed.

11-25-2012, 03:27 PM	eBay Motors #1 (permalink)
Dirtywhitelmm Junior Member Join Date: Oct 2012 Location: lincolnton Ga Posts: 182	Hit the track today in my "new to me Lmm" something is off First off mods are mpi stock over s480, 100hp ddps, 120 over II double dragon pump, ppe up pipes and manifolds, ad 165,Sdp intercooler pipes, cognito 4 inch lift," all the way down to the bump stops" cognito braces and tie rods, traction bars, 305/55 20 cooper zeons, Ppe stage 5 trans- precision ml converter EFI tuned by Rob Ok sorry haven't updated my sig Anyway on the big tune leaving at 10lbs of boost cut a 1.728 60' ft 1/8 mile 7.915 @ 85.08 1/4 mile 12.548 @ 103 Expected a little more and in my opinion the 1/4 mile mph is way off for the time any opinions on what might be wrong, my guess is rail pressure. Didn't have my v2 to log so I guess it's kind of a shot In the dark because I'm sure y'all will say get rob to check the log but let me know what y'all think Thanks Sent from my iPhone using AutoGuide.com Free App __________________ 09 ccsb lmm cognito 4-6, bmfs, MPI TWINS. Double dragon, 100hp ddps, arp studs, track bars, trans built by Trey Fox (blackdirtymax)

11-25-2012, 03:53 PM	eBay Motors #2 (permalink)
mike diesel DuramaxForum Enthusiast Join Date: Jan 2012 Location: SLC, Utah Posts: 2,167	Whats your location/altitude? My guess would be that rob has some extremely conservative tuning on it to keep those poor lmm pistons alive. You have alot of fuel and air potential that will easily destroy your stock bottom end. __________________ 05 lly EFI Live 4094 vvt Built Trans BT Lockup Box Supporting Mods

11-25-2012, 03:58 PM	eBay Motors #3 (permalink)
WVRigRat05 Salt sucks Join Date: Feb 2009 Location: Buckhannon,West Virginia Posts: 4,609	Id rape it just so I had to build it. Im puttin twins on mine(S475 over stock), almost certian Ill trash the rods and have to do surgery again with carillos. __________________ Reger Black on Black 05' Silverado 2500 HD 4X4 CC/SB, LBY7, LT. 8580 lbs Motor died 1/19/12 190.131 mi. Trans. died 7/27/12 200,136 mi. Built motor/Trans and tuned by Blackout Performance some parts to take it. 2011 30' Puma KDBSS

11-25-2012, 04:02 PM	eBay Motors #4 (permalink)
Dirtywhitelmm Junior Member Join Date: Oct 2012 Location: lincolnton Ga Posts: 182	The truck was tuned for the first owner In Ohio I'm in eastern Georgia 330 to 360 above sea level Sent from my iPhone using AutoGuide.com Free App __________________ 09 ccsb lmm cognito 4-6, bmfs, MPI TWINS. Double dragon, 100hp ddps, arp studs, track bars, trans built by Trey Fox (blackdirtymax)

11-25-2012, 04:05 PM	eBay Motors #6 (permalink)
lutzjk913 Meyer Performance Join Date: Oct 2008 Location: groveport, ohio Posts: 4,936	Is this nick's old truck? __________________ Joe 2008 CCLB LT2 DURAMAX LMM was once stock Special thanks to Tyler @ www.MeyerPerformance.com 812-344-4421

11-25-2012, 04:08 PM	eBay Motors #7 (permalink)
Hondarider552 Banned Join Date: Nov 2008 Location: Arizona Posts: 17,269	Why do you think its rail pressure? Do you have a log of the run? Somethings wrong, I ran 107mph on stock LBZ.

11-25-2012, 04:12 PM	eBay Motors #8 (permalink)
lutzjk913 Meyer Performance Join Date: Oct 2008 Location: groveport, ohio Posts: 4,936	Did it feel like it layed over in the higher gears? Maybe a converter problem. __________________ Joe 2008 CCLB LT2 DURAMAX LMM was once stock Special thanks to Tyler @ www.MeyerPerformance.com 812-344-4421

11-25-2012, 04:22 PM	eBay Motors #9 (permalink)
plowboy_lbz Senior Member Join Date: Sep 2012 Posts: 560	you had a good 60 ft time for having a lift kit. i would think that your tuning is what is holding your back. ever been on a dyno?? i'm not a fan of II pumps, but it should be able to keep up. you have more than enough potential to blow your shit up!! __________________ 07 lbz ccsb Danville 4094anvt w/billet wheel, floor-it-diesel stg II cp3, atp tuning, suncoast, RDL uppipes, egr delete, Y bridge, 5" ex, edge insight, EXAXT, cognito uca's, traction bars, AD II 165, banks IC, extra leaves, 305/70/16's, blacked out grill, cowl hood, tough country bumpers Dyno - 582hp 1209tq - SJD, 561hp 1247tq floor-it-diesel (stock turbo & inj.) Track - 12.82 @ 105.5 mph @7300lbs 1.82 60 ft 07 lbz rclb tuned by Kory, 4" ex, RDL egr delete, banks IC, edge insight, bd lift pump w/remote WS, nicktane, ranch hand front

11-25-2012, 04:25 PM	eBay Motors #10 (permalink)
WVRigRat05 Salt sucks Join Date: Feb 2009 Location: Buckhannon,West Virginia Posts: 4,609	Big tires will kill it some too. Mines a horse when unloaded but still not a fast as a truck with less mods and smaller tires. I'd go back to 33's but then I'd be wound for sound. you def. benefit for smaller tires with the 6 speed. __________________ Reger Black on Black 05' Silverado 2500 HD 4X4 CC/SB, LBY7, LT. 8580 lbs Motor died 1/19/12 190.131 mi. Trans. died 7/27/12 200,136 mi. Built motor/Trans and tuned by Blackout Performance some parts to take it. 2011 30' Puma KDBSS

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