Duramax Diesels Forum Truck of the Week
  #1  
Old 08-31-2009, 05:14 AM
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Default I have seen the impossible!

First I will start saying I dont have pics. So if you dont belieive me I understand.

At the truck pull this weekend It was a 2001 GMC with a LLY motor in it. At first I did not beleive the guy when he said it. He then popped his hood and proved me wrong.

He claim that he was able to use the LB7 wiring harness. He just had to splice in the LLY injector harness. He was running a Aurora 4000 turbo and had the Rick D Lance up pipes.

He is supposting be pulling at the pull in september. I am going to try and get some pics then to show you guys that I am not crazy as this post may sound to some.
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Old 08-31-2009, 07:50 AM
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I can believe it, but I'm curious how he did it; In theory, you could drive a LLY FICM (and thus LLY injectors) with an LB7 ECM, since the injector outputs *should* be the same at the ECM on both (It's the FICM that supplies the LLY's 48v or the LB7's 96v), but you'd probably have to adjust for the different flow characteristics of the injectors. Not sure how the LLY injectors would like the LB7's 96v FICM though...
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300.59' 3rd place first pull

Best 1/4 times:
Truck: 14.067 @ 96.29, weighing in at over 7200#
446.4RWHP/820.2RWTq
Car (95 Cougar 4.6L V8): 14.680 @ 94.00

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Old 08-31-2009, 08:06 AM
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He was telling me that the voltage going to the injectors is the same on all models of the dmax.He seemed to know what he was talking about.

He said he was still working on some small tuning issues but nothing to drastic.
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Old 08-31-2009, 09:17 AM
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Quote:
Originally Posted by Sandracer799 View Post
He was telling me that the voltage going to the injectors is the same on all models of the dmax.
no, Sorry, they're not.

LB7 = 96v
LLY = 48v
LBZ & LMM = 24v
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Mike L Trans built by ME.
EFILive, PPE Race Valve, KD Twin Lift Pumps & Billet Fuel Pickup, MBRP 4" "Cat-Back" T409 straight piped.

300.59' 3rd place first pull

Best 1/4 times:
Truck: 14.067 @ 96.29, weighing in at over 7200#
446.4RWHP/820.2RWTq
Car (95 Cougar 4.6L V8): 14.680 @ 94.00

"The FIRST weapon is the mind, all others are incidental."
"I'd rather be judged by twelve than carried by six."

Last edited by Cougar281; 08-31-2009 at 09:18 AM.
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Old 08-31-2009, 11:27 AM
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My question is why? What is the point? The engine characteristics are the same just the heads, tuning, injectors, turbo and other little things are different. I just dont see the point. Maybe if he had gone to the LBZ with different bottom end I could see.
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Old 08-31-2009, 11:37 AM
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Quote:
Originally Posted by Cougar281 View Post
no, Sorry, they're not.

LB7 = 96v
LLY = 48v
LBZ & LMM = 24v

I 100% beleive you. I am just saying what he told me.
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Old 08-31-2009, 11:38 AM
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Quote:
Originally Posted by specialagentPK View Post
My question is why? What is the point? The engine characteristics are the same just the heads, tuning, injectors, turbo and other little things are different. I just dont see the point. Maybe if he had gone to the LBZ with different bottom end I could see.

I dont really know why. From the price he told me he paid for the LLY I know he did not get a smoking deal on it or anything.
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2002 GMC D/A CC/SB 4x4
295 BFG AT's on PYO's, 20% Tint, Autometer Sport Comp Pyro and Boost Gauges, Kenwood KDC-792, EFI Live, ARP Head Studs
SD on Demand Lift pump, SD Sleeves, SD Centerlink, SD Modded Intake Horn, S&B Intake, Kennedy Headlight Harness,
MA High Idle, Complete 4" MBRP Installer Series, SC III w/1056 converter

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Old 08-31-2009, 11:41 AM
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What did this truck look like? And was he from somewhere in the northern Va/Winchester area?
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Old 08-31-2009, 11:48 AM
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If you see him again, find out what board he's on. Better yet. Tell him to join here and give us a breakdown on his truck and how he did it. I would love to find an easier and cheaper way to get rid of the problematic injectors for some that won't go bad if you sneeze wrong.
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Old 08-31-2009, 12:16 PM
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Quote:
Originally Posted by T2CH View Post
What did this truck look like? And was he from somewhere in the northern Va/Winchester area?

I beleive his name was Daniel Jones. His truck is a Dark Blue GMC ECLB.
He works for Dominon Power downtown. He said he lives in Amelia.
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295 BFG AT's on PYO's, 20% Tint, Autometer Sport Comp Pyro and Boost Gauges, Kenwood KDC-792, EFI Live, ARP Head Studs
SD on Demand Lift pump, SD Sleeves, SD Centerlink, SD Modded Intake Horn, S&B Intake, Kennedy Headlight Harness,
MA High Idle, Complete 4" MBRP Installer Series, SC III w/1056 converter

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  #11  
Old 08-31-2009, 01:48 PM
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Quote:
Originally Posted by specialagentPK View Post
My question is why? What is the point? The engine characteristics are the same just the heads, tuning, injectors, turbo and other little things are different. I just dont see the point. Maybe if he had gone to the LBZ with different bottom end I could see.
That's one good reason why one might want to run a LLY longblock with a LB7 ECM. LLY Injectors are a TON easier to get to.
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Mike L Trans built by ME.
EFILive, PPE Race Valve, KD Twin Lift Pumps & Billet Fuel Pickup, MBRP 4" "Cat-Back" T409 straight piped.

300.59' 3rd place first pull

Best 1/4 times:
Truck: 14.067 @ 96.29, weighing in at over 7200#
446.4RWHP/820.2RWTq
Car (95 Cougar 4.6L V8): 14.680 @ 94.00

"The FIRST weapon is the mind, all others are incidental."
"I'd rather be judged by twelve than carried by six."
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Old 08-31-2009, 01:49 PM
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Quote:
Originally Posted by Cougar281 View Post
That's one good reason why one might want to run a LLY longblock with a LB7 ECM. LLY Injectors are a TON easier to get to.
X2 - I've done enough under the valve covers of an LB7 to consider changing to an LLY.
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Old 08-31-2009, 01:50 PM
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Very true but last I checked prices for an LLY injector they were alot more expensive so I would rather invest more time than money on my injectors.
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Old 08-31-2009, 01:56 PM
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Quote:
Originally Posted by specialagentPK View Post
Very true but last I checked prices for an LLY injector they were alot more expensive so I would rather invest more time than money on my injectors.
That's debatable; Yes, LB7 injectors are cheaper, but they tend to go bad more often. LLY injectors are more expensive, but relative to LB7 injectors, they rarely go bad.
__________________
'04.5 2500HD Silverado LT CC/LB, LBZ D/A Dark Grey
Metallic, 05+ HD Hood & Grille, 192k and counting
Mike L Trans built by ME.
EFILive, PPE Race Valve, KD Twin Lift Pumps & Billet Fuel Pickup, MBRP 4" "Cat-Back" T409 straight piped.

300.59' 3rd place first pull

Best 1/4 times:
Truck: 14.067 @ 96.29, weighing in at over 7200#
446.4RWHP/820.2RWTq
Car (95 Cougar 4.6L V8): 14.680 @ 94.00

"The FIRST weapon is the mind, all others are incidental."
"I'd rather be judged by twelve than carried by six."
Reply With Quote
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Old 08-31-2009, 01:56 PM
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Quote:
Originally Posted by specialagentPK View Post
My question is why? What is the point? The engine characteristics are the same just the heads, tuning, injectors, turbo and other little things are different. I just dont see the point. Maybe if he had gone to the LBZ with different bottom end I could see.
For the tuning ease of a Lb7. LLY is a great motor but the ECM sucks ding dong. Swap to a Lb7 ecm and adjust for tuning for the bigger sticks LB7's have and boom.
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