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Thread: Parameters changed for performance.

  1. #21
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    I should say "drive pressure" instead of just back pressure. My bad. Drive pressure is between the turbo and engine (technically back pressure) and is a necessary evil to make boost. How much evil is another story. A better flowing exhuast helps to a point.

    Bobo is right, a larger VVT would help out a lot here.

  2. #22
    Forum tyhee Site Admin GMPX's Avatar
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    Quote Originally Posted by Fingers
    Bobo is right, a larger VVT would help out a lot here.
    Pardon my ignorance....do larger ones exist?, VVT seems like a good thing to me.

    Cheers,
    Ross
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  3. #23

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    Does anyone make a nice replacement turbo for these trucks without major modifications? Now that the tuning is available, it would be much easier to go to a slightly larger turbo.

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  4. #24
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    IMHO: BD turbo is your best shot. It isn't a VVT, but there isn't a bigger VVT out on the market than stock. McRat tried the new LBZ VVT on his 05 LLY. He didn't notice much more than the stock LLY turbo. You could also look into the Aurora 2000 or 5000. The 2000 is just a bit bigger than the stock LB7 turbo, but don't flow as much air as the BD. The 5000 is the big boy of the bunch, but requires head studs, injectors, and possibly CP3 modifications. Tomack runs the 5000. He is putting down around 600-650rwhp on fuel only (12 flat at 7000# in the 1/4). I'm sure the BD is good for 600rwhp(I seen an LB7 run three 13.3 passes w/ 2.0 60ft times on a hot juice alone w/ BD turbo installed) and the 2000 is good for 550. Bang for the buck the BD takes it hands down. ATS is introducing the hybrid VNT (Variable Nozzle Turbo). This has not been proved and is a new engineering concept that has finally been released to the public. I would not mess w/ it yet. I'll let the "twins" folk explain your options there. They are having very good results on the LLY w/ twins.
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  5. #25

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    Quote Originally Posted by bobo
    IMHO: BD turbo is your best shot. It isn't a VVT, but there isn't a bigger VVT out on the market than stock. McRat tried the new LBZ VVT on his 05 LLY. He didn't notice much more than the stock LLY turbo. You could also look into the Aurora 2000 or 5000. The 2000 is just a bit bigger than the stock LB7 turbo, but don't flow as much air as the BD. The 5000 is the big boy of the bunch, but requires head studs, injectors, and possibly CP3 modifications. Tomack runs the 5000. He is putting down around 600-650rwhp on fuel only (12 flat at 7000# in the 1/4). I'm sure the BD is good for 600rwhp(I seen an LB7 run three 13.3 passes w/ 2.0 60ft times on a hot juice alone w/ BD turbo installed) and the 2000 is good for 550. Bang for the buck the BD takes it hands down. ATS is introducing the hybrid VNT (Variable Nozzle Turbo). This has not been proved and is a new engineering concept that has finally been released to the public. I would not mess w/ it yet. I'll let the "twins" folk explain your options there. They are having very good results on the LLY w/ twins.
    Thanks for this info! I am not looking to go nuts its still a "daily driver". My Corvettes feed my speed appetite! I was hoping there was a nice replacemenet turbo to step it up a bit. Now that the tuning is here, and working, I am kind of interested in fooling around with the truck. I'll look into the options you noted. I have already gone 14.60 in my 4wd crew cab which I though was funny as hell for a 7000 lb truck!

    www.redline-motorsports.net

    1-954-703-5560

    2006 ZO6 895/866 with APS TT
    2010 SSRS Camaro HTR-900TT (798/801)
    2011 HTR-850R Camaro
    2012 ZL1 Auto (10.33@135 MPH) Video Here!

  6. #26
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    Quote Originally Posted by GMPX
    Pardon my ignorance....do larger ones exist?, VVT seems like a good thing to me.

    Cheers,
    Ross
    Nothing bigger right now, but I am working on that. These turbos share some parts with others and function the same from a controls point of view to almost any VVT.


    VVT can be, and is, very effective in other applications. However, to take full advantage, we need some logic changes to the OS.

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