pwrtripls1

I picked this up on another forum I'm on and couldn't resist, even if it means I'm picking on myself a little. lol

Enjoy the pulling power of the cummins vs. Dmax. Also the retardedness of the Dmax owner. Seems most guys I talk to on the Dmax forums have a firm view that your engine coolant temp has nothing to do with your EGT's. A stock LLY Dmax WILL run 1300-1350* pre turbo with a lot of throttle. I.E. a heavy load uphill. Well when you run 1300-1350* EGT's for 5-10 minutes strait then yes you are going to overheat like crazy. You MUST have a better intake, especialy for an LLY Dmax, and a free flowing exhaust. Then with 1050-1100* EGT's overheating shouldnt be an issue. Well most of those guys think I'm crazy and you should be able to run 1350* all day and not get hot.

http://videos.streetfire.net/video/L...htm#commentTop

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1992 D250 Ext Cab 5 Speed LE. . 4" DP, single 5" stack, K&N custom intake, timed to block, fuel screw maxed, ground fuel pin, DDP 80hp Injectors, GDS 60mm, Ported 12cm/wg, 4200 gov, Grid Delete, E-Fans, all Royal Purple fluids, KSB, 50psi but no smoke!!! 241whp/584wtq 4-30-08
2007 GMC LBZ Dmax.--stock w/ Bully Dog
2005 Chevy LLY Dmax strait pipe, Airaid, Bully Dog, Edge/Attitude, ect.....
1999 Blazer 4x4 4.3L, N2O, C6 wheels, 2600 TCI, Insane Oil System, ect........

deerslayer1979

HAHA, The D-max will make power I dont deny that, but I've known all along using that power was the challenge! I don't feel bad for him, he bought a grocery getter and thinks its a work truck.
DS79

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1992 W350 DRW NV4500 4.10 gears. Fuel screw turned 3 turns, pin turned and washer removed, 16cm housing, boost and pyro gauges Alum. flatbed with hidden goose neck.

peobryant

Seen this video a long time ago. There have been a few threads about it, but I think they were all closed.

I still wish it was an old 1st Gen that he couldn't keep up with.

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Parker

'91.5 D350, 2wd Dually, 4" Straight Pipe, 366 Spring, DennyT Stage II Fuel Pin, Isspro Boost, Pyro, Tranny and Fuel Pressure Gauges

Brothers: '97 2500, 12 Valve, 4wd, 5spd, 716rwhp, 1200+rwtq, Single Turbo, Fuel Only, 5" Stack

Dad's: '97 2500, 12 Valve, 4wd, Cousin Billy Auto, A couple pump mods, 4" Straight Pipe

Brothers: '03 2500, Common Rail, Full Billet Auto, Triple Disc Converter, FASS, Bank$ Intercooler, HTT 62/71/13, Bully Dog "Power Pup", Eagle Alloys, 5" Straight Pipe

TexasCTD

http://www.dieseltruckresource.com/d....html?t=132131


This is old news. TXChristopher joined DTR and made some comments here on this thread listed above. He is the guy talking in the video. I believe he sued GM and won and used this video in court.

..

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2004.5 SRW 3500 Black 4x4 SLT CTD QCLB, RanchHand w/ Milemarker 12K, Frontier Rear Bumper, Putnam XDR Class V hitch, Hellwig, Pacbrake air bags, Leveled, PW Flares, Nitto TGs 285/75/17, AFE Stg 2, GDP Walbro 392 w/2 micron, Smarty, TS MP8, Lazarsmith Traction Bars, DTT 48RE w/DTT Triple Disc TC, F1 valve springs and Flux 1.8s (needs more turbo now!)

506/1057 6-13-09, 13.27 at 8390lbs 10-10-09--stock stix, turbo, cp3

2004 WW FS2600 Toyhauler

SAC #73, Goofball #6, T.O.M. Dec. 2008

MikeyB

Yep, Chris won the lawsuit against GM.

The issue was do to with the Duramax cooling system, not EGTs. Would overheat during towing and go into limp mode. A poor design for that model version cause airflow issues though the cooling stack up.

I tow over that same stretch of highway and my Cummins would get to around 210-215 degrees during the summer.

MikeyB

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2003 2500 2wd SWB Quad Cab Laramie, 305/555, NV5600, 3.73LS, Line-X, Westach boost/EGT combo gauge, Fogzilla mod, PML diff cover, Airbox mod w/Amsoil Ea, Hurst 6spd Shift knob, Adjustable boost elbow, Sirius, Toyo OC AT 285/70/17 E, Daystar 1.5" lift, Monroe Reflex, Raptor RP100, Lazarsmith Intake Horn, Headlight wiring upgrade
SMARTY/Van Aaken C3.2


2005 Dodge Magnum RT (Wife's ride)
2008 Dodge Caliber RT (Daughter's ride)
1990 HD FXSTS

pwrtripls1

I guess I'm a little slow. lol I still wish he had a pyro to see how high the EGT's were while pulling stock. These LLY's have a tiny turbo inlet pipe. The turbo intake pipe gets choked down to a bent 2.5". How is a 300+hp turbo diesel supposed to breath and keep EGT's down while trying to suck through a tiny 2.5" hole?

I'm no mechanical engineer but you would think that would starve the engine of air. Which in turn would make the VVT close the vanes more trying to build more boost and get more air into the engine. But without being able to draw more air in the vanes closing would only create more back pressure, more heat, and higher EGT's. I wonder if anyone has ever put a good flowing LBZ turbo inlet and a cold air intake or an aftermarket non VVT on an LLY and overheated it.

rich

i run that stretch all the time never see over 210 towing 18k

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SIX IN A ROW BUILT TO TOW,CUZ WELL WE ALL KNOW , HAVING A V-8 AIN'T THAT GREAT Dodge trucks that havent made life expectancy
96 3500,-175k 98.5 3500 -164k ,98.5 3500-275k, 01 3500-140k, 03 3500 -155k, 07 3500-68k waiting for possible P-Pump conversion and now I'm killing the 06,3500-116k as of 10-01-09 and counting and yes i make my trucks earn a living buy towing professionally

pwrtripls1

Wow, you go thru trucks pretty fast. Were they all minor problems like pumps when they quit or were they catastrofic failure?

rich

no most of them just wear out the 03 and 07 where the ones with engine problems mainly caused by the injectors

1slo_MM

Wow I think thats hilarious!!!

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'6.5 RC Dually, 6-Spd, Level kit w/Arnott Air bags, Nitto Dura Grapplers 285/75r17E, 62/71/13ss^S480 Twins, SBC 3600 DD 12CB Sprung, 62" Traction Bars, AD150, Flux 2.4's, SMARTY TNT-R PoD, MP-8, Hamiltons, ARP's, Billet Pushrods, Floor It Diesels "BeTTeR" bag of parts, 5" TB, 4 Optix guages..

494hp 932tq at Hi-Tech Oct '9

700 club 4-27-08, 721 miles 37.69g

SAC member #298

DTR "Twins" Club Member #54

Lil Dog

I have been following this as well as my biz partner has an LLY and gets hot. We noticed that the intake plumbing was shrunk down from the LB7 series engine as his Air shutoff valve wouldn't fit, pipes on the LLY were too small! It seems to us, after extensive reading that its a coupling of heat soaking of the intercooler and the inefficient turbo system (turbo, tubing and intercooler). Once you start heat soaking the intercooler, it super heats the rad. EGT's start going up from the turbo pushing more boost, intercooler gets hotter, intake air temp goes up, engine water temperature starts going up and then the cycle just keeps going untill something gives. Either the load goes down, or the engine starts to de-rate. Some fixes of cool air intakes and exhaust upgrades help a little, but not enough.

The fellow that sued GM has a fix out that is a secondary rad mounted down low to accomodate extra cooling. We were wondering if the LBZ rads were that much bigger or what, but you could find a LBZ rad at the wreckers and upgrade to that.

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97 2500 4X4 LWB CC SLT Laramie 5spd LSD 3.55.
Isspro EV's pyro/boost, #10 Plate, PEAK 3K GSK, AFC Spring, DDP III injectors, S300 Turbo, PEAK IC Boots, TAG III, South Bend 13-1.25" Con FE clutch, SCOTTY II-UNI, MBRP XP 4", KDP Tab, 16° Timing, SS DSS / 03TBK, Roda Deaco PAS. Espar D5WSC heater. B-Quiet sound deadening inside.
Dyno 09-2009 401 RWHP / 1050 Ft-lbs

'08 2500 4x4 MegaCab Laramie, 6.7, 68RFE, 3.73 LSD, S-67ME POD.

Alberta Chapter #5 Prez... PM me for details...

duratothemax

really? You JUST found this video now????