Duramax Diesels Forum Truck of the Week
  #16  
Old 08-19-2017, 06:55 PM
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I'd really like to try the turbo is stuff. My new neighbor that I just met yesterday told me I could have his extended cab silverado, so that might be a sign lol
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  #17  
Old 08-19-2017, 07:00 PM
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You will tax the cooling system quickly and 4th gear will be an issue if you try to use any of that power while towing. Trans will need a good build unless you keep it in 3rd under power pulling hills. We ran a whipple supercharger on my moms 98 cc/lb 454 GMC. Truck was lifted on 35s and towed a 35ft Alfa toy hauler and a 40ft weekend worrier. Had 75k on it when we sold it and a stock 4l80 but my dad never overly abused the truck when towing. Would always kick it to 3rd on hills and was always worried about breaking something so never really wooded it. Only time I remember was in pismo beach when we had to make a loop up into the soft sand. 30psi in the back tires, 25 in front and trailer down to 20 on all 6. 4 low 3rd gear, that motor and super charger sung a beautiful tune. We were the only truck of the camp to make the turn without getting stuck lol. Truck made somewhere in the 400-450 range on a cool day.

If you are smart with it, I see no reason it will tow just fine. Just still won't be like a dmax and an Allison. That said, you know I'd build it and try to make it work
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best time to date: 12.39

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  #18  
Old 08-19-2017, 07:08 PM
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The rig I have now is a 200k Yukon Denali that's mint and I picked it up for a song. I ran across a 6.0 for a steal and the same on the 80e.. this thing runs damn good as is. But waking it up another 100hp would be tits.

Hell maybenill just cam springs and tune the motor that in it and run it till the trans or engine shits out
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  #19  
Old 08-19-2017, 07:11 PM
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Quote:
Originally Posted by clrussell View Post
The rig I have now is a 200k Yukon Denali that's mint and I picked it up for a song. I ran across a 6.0 for a steal and the same on the 80e.. this thing runs damn good as is. But waking it up another 100hp would be tits.

Hell maybenill just cam springs and tune the motor that in it and run it till the trans or engine shits out
From what I hear a black bear tune makes an LS a whole new animal
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  #20  
Old 08-19-2017, 07:44 PM
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Quote:
Originally Posted by zakkb787 View Post
From what I hear a black bear tune makes an LS a whole new animal


I wouldn't recommend him to my worst enemy.
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Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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  #21  
Old 08-19-2017, 07:46 PM
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Originally Posted by Chevy1925 View Post
I wouldn't recommend him to my worst enemy.
Really? First time I've heard that. I shoulda known I was wrong
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  #22  
Old 08-19-2017, 08:49 PM
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Been thinking same thing with my 01 burb 6.0/80 pretty sure Engine has been over heated by PO..
thinking bore/stroke to 408 4" stroke .030 small cam.. 01-04 lq4 had a 196/207~.467/.479 lift and ~300/380 hp/tq.. 210-220° .550-.600 lift would wake it up big time...

How far will Stock injectors go before you need to up those..
4-450 and be 87 octane capable is what I'd like
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  #23  
Old 08-19-2017, 09:06 PM
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Quote:
Originally Posted by zakkb787 View Post
Really? First time I've heard that. I shoulda known I was wrong


Lmao. He was a royal pain in the ass for a couple of my friends. Well beyond what anyone should have to go through to get an update to a tune or simply communicate an issue. These weren't even full all out builds, just small stuff like the typical ls build or just tuning an 8.1.
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Quote:
Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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  #24  
Old 08-20-2017, 03:53 AM
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Quote:
Originally Posted by Chevy1925 View Post
I wouldn't recommend him to my worst enemy.
They are terrible, slow retunes and not that good either. I'm using a local tuner but if it dosent work out I've developed a relationship with the guys at PCM...

Quote:
Originally Posted by malibu795 View Post
Been thinking same thing with my 01 burb 6.0/80 pretty sure Engine has been over heated by PO..
thinking bore/stroke to 408 4" stroke .030 small cam.. 01-04 lq4 had a 196/207~.467/.479 lift and ~300/380 hp/tq.. 210-220° .550-.600 lift would wake it up big time...

How far will Stock injectors go before you need to up those..
4-450 and be 87 octane capable is what I'd like
You will need flex fuel injectors at the mimiunm, stock are like 26# I believe. You will run out of fuel under 400 stock....
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  #25  
Old 08-20-2017, 03:55 AM
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Quote:
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That's been on my mind.. I really want one for my boat
Lol... First guy on the board would get his arms ripped out of his shoulders...
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  #26  
Old 08-20-2017, 05:59 AM
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Figured I'd need to beef up the stock fuel pump and injectors
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Adam
mispeeling wrods n a thraed nere u
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smooth seas never made a skillfull salior
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  #27  
Old 08-20-2017, 07:05 AM
bmc1025 bmc1025 is offline
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Just decap the stock truck 6.0 injectors. They will flow close to 80# a larger fuel pump is a must.
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  #28  
Old 08-20-2017, 10:34 AM
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I'll sell you my 200lb/hr injectors
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  #29  
Old 08-23-2017, 04:47 PM
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Anyone here play with ls tuning? There's a local guy to me but I've got efi and would kinda like to pay myself
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  #30  
Old 08-23-2017, 05:42 PM
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Default Any turbo ls knowledge?

Quote:
Originally Posted by clrussell View Post
Anyone here play with ls tuning? There's a local guy to me but I've got efi and would kinda like to pay myself


Doooo ittttt. Just takes time if you are starting from scratch. Tune when not in boost, then when it's dialed, start slowly working up in boost. Watch knock sensors for knock, pull 2* of timing per lbs of boost then add or subtract as necessary depending on what the knock sensor says from 3k rpm on up. Keep afr on the rich side. Depending on how big of injector you go, only cut the fuel back by half of the increased fuel in the tables so you stay fairly rich, then start leaning out idle, cruise, light boost/throttle and heavy boost/throttle. Iirc, ls like to stay around 11.5 - 12.0 afr at wot in the upper rpm range depending on compression ratio and fuel used. Wouldn't hurt to go one range colder in plugs too.

Things get a little technical when you need to dail in closed loop driving. I've not played with that to give much but all of the above works well when in open loop (above 40% throttle or so)
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Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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