Duramax Diesels Forum Truck of the Week
  #31  
Old 01-05-2010, 05:51 PM
landers11889 landers11889 is offline
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you dont need down pipes and uppipes for 600HP you need a turbo and those or nitrous. I have 600+HP with my truck it wouldnt be possible without the turbo.
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  #32  
Old 01-05-2010, 06:39 PM
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Quote:
Originally Posted by TheBac View Post
Looks like we should probably add Michael's modded turbo inlet to this list.
x2 on the turbo inlet mod, I did this and it sounds awsome and really wakes up the turbo, now I just need to stop being lazy and get my lift pump installed
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  #33  
Old 01-05-2010, 08:14 PM
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Guys, running insane lift pump pressures is pointless. All it does is increase the return rate from the CP3. There is an internal regulator inside the pump that regulates case pressure, anything above that pressure just becomes return to the fuel tank.
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  #34  
Old 01-05-2010, 09:38 PM
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Quote:
Originally Posted by landers11889 View Post
you dont need down pipes and uppipes for 600HP you need a turbo and those or nitrous. I have 600+HP with my truck it wouldnt be possible without the turbo.
with a stock turbo you do
if you do a bigger turbo you need a downpipe for LB7
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  #35  
Old 01-05-2010, 09:41 PM
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Quote:
Originally Posted by Mike_S View Post
Guys, running insane lift pump pressures is pointless. All it does is increase the return rate from the CP3. There is an internal regulator inside the pump that regulates case pressure, anything above that pressure just becomes return to the fuel tank.
I could see insane pressure but a pump setup that runs more than 12 psi after the FCM has shown improvements
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  #36  
Old 01-06-2010, 01:28 AM
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Quote:
Originally Posted by landers11889 View Post
you dont need down pipes and uppipes for 600HP you need a turbo and those or nitrous. I have 600+HP with my truck it wouldnt be possible without the turbo.
A few people have dynod 590 on fuel only with a stock turbo. With manifolds or headers and up-pipes as well as a downpipe they would likely have been over 600.
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  #37  
Old 01-06-2010, 07:50 AM
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Hi all, not to drag this OT but does anybody know what voltage and current the ficm uses to run and does it vary with rpm or load and such? Just curious to find wattage that this thing needs to dissipate the heat. Also another dumb question, but why is water based coolant a no no on these? Forgive my ignorance.

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Last edited by chevy_dmax; 01-06-2010 at 07:50 AM.
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  #38  
Old 01-06-2010, 03:57 PM
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Nobody? I know there are some fart smellers on here....

Bill.
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  #39  
Old 01-06-2010, 06:38 PM
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IIRC, LB7 FICM runs on 97 or 98 volts.


This is info found by ripmf666 last year:

Injector Operation LB7/LLY( prior to 2006)
The FICM uses two drivers to contol each injector.The High Side Driver(HSD) delivers 93 volts updated to 97 volts to the B+ side of the injector.Each HSD powers four of the eight injectors,Connector C1,terminal3,powers injectors1,4,6,and 7(Bank 1).Connector C2,terminal 118 powers injectors 2,3,5,and 8 (Bank 2).

Bank 1 is on the right side of the engine.The firing order is 1-2-7-8-4-5-6-3.

The Low Side Driver,(LSD) grounds the injector to turn it On.There is one LSD for each injector.

A peak-hold strategy is used to open the injectors.It requires up to 20 amps to open the injector and 12-15 amps to hold it open.

If a circuit fault occurs for a single injector, a P0201-P0208 DTC will set.In addition, A DTC will set for the bank that contains the injector.
A fault on bank 1 (1,4,6,7) will set a P1261 and fault on bank 2(2,3,5,8) will set a P1262.

(Loose one loose them all)
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  #40  
Old 01-07-2010, 07:27 AM
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Thanks......I knew the lb7 worked on 96 volts or so. So pretty much 97 volts at a maximum of 20 amps at an given time....so roughly 1940 watts. Hmmm thats more than I was thinking. If the lbz/lmm works on 48 volts, do thier injectors require twice the current to operate. Sorry guys for OT.

Maybe need to start another thread to brainstorm about this.

Thanks Tom,

Bill.
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Last edited by chevy_dmax; 01-07-2010 at 07:29 AM.
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  #41  
Old 01-07-2010, 11:02 AM
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Quote:
Originally Posted by chevy_dmax View Post
...
Maybe need to start another thread to brainstorm about this.

Thanks Tom,

Bill.
please do. I'm interested to know also.
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  #42  
Old 01-07-2010, 07:55 PM
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Quote:
Originally Posted by othrgrl View Post
A few people have dynod 590 on fuel only with a stock turbo. With manifolds or headers and up-pipes as well as a downpipe they would likely have been over 600.
On an LB7?
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Nancy:
2004 CC SB, LB7, 2500 HD, Borg Warner spinny thingy, Carillo tough stuff, Transgo/suncoast tranny stuff, DMP squirt guns, and a couple custom parts.
The General:
1994 EXT Cab, SB, 1500 HD, 350 SBC, Whole Buncha $hit And Its Still Not Fast.
(I do all my own work...and thats not always good)
Good, Fast, Cheap...You Can Only Have Two!

You only need 2 tools: duct tape and WD-40. Duct tape for when it moves and isnt supposed to, and WD-40 for when it don't move and should!
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  #43  
Old 01-07-2010, 08:11 PM
KEVINL KEVINL is offline
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Yep Thebac hit 590 on fuel with the IHI on a LB7
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  #44  
Old 01-07-2010, 08:31 PM
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578, fuel only. stock turbo/pipes. But then the rods got tweaked...
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"BBT" -- 2003 GMC CC/SB 4x4 12.14@111.15
"Flyin' Brick" -- 1999 Chevy 1500 RC/SB 2wd -- stalled out, no motivation
"The Cruzer" -- 2014 Chevy Cruze Diesel -- the fun little DD
"The Bigger Boat" -- 2011 Workhorse P700 - 6.0LS/Allison - what I drive at work


Two wrongs dont make a right, but three rights do make a left.

Reality is a matter of perspective.

This forum isn't for the weak of heart.....or wallet.

"Lets build a race car they said. Itll be fun they said. I don't know who "they" are.........but they need a good punch in the face!" -- mufflerguy (yb)

Last edited by TheBac; 01-07-2010 at 08:32 PM.
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  #45  
Old 03-16-2010, 10:29 PM
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ok stupid question how do i know rail pressure on my lb7
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