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Thread: LSX 438 Twin Turbo

  1. #131
    Join Date
    Sep 2007
    Location
    Southeastern Wisconsin
    Posts
    275
    Purely Amazing! they did some beautiful work on that truck, im jealous. Can't wait to see what kinda power it puts down to the wheels...

    that truck is AWD too isnt it?

  2. #132
    Join Date
    Jul 2007
    Location
    Stockton, Calif
    Posts
    88
    http://www.denalitrucks.com/sm-files/mark-sig.jpg
    But Officer, I swear its just a vacuum leak.

    Those red things? those are smog pumps!

    2004 Sierra Denali ----- 2/4 drop
    LSX 438 TWIN TURBO

    LSX Block Video
    Block number 00370. Build Date 04/17/2007

  3. #133
    Join Date
    Dec 2003
    Location
    Azle,TX
    Posts
    3,682
    Nice video...but i want to see it haulin ass or doin an all wheel burnout! No sense in spending all that money if you cant go out and break it showin it off!...LOL Yall know I would! Nice work man it sounds,as we say around here....SLOW
    Vortec Performance Tuned
    LQ9 built 4L60 LTs and a billion miles on the speedo!

  4. #134
    Join Date
    Jul 2007
    Location
    Stockton, Calif
    Posts
    88
    lol,
    still working on the crank case breathing system before he puts it on the dyno
    http://www.denalitrucks.com/sm-files/mark-sig.jpg
    But Officer, I swear its just a vacuum leak.

    Those red things? those are smog pumps!

    2004 Sierra Denali ----- 2/4 drop
    LSX 438 TWIN TURBO

    LSX Block Video
    Block number 00370. Build Date 04/17/2007

  5. #135
    Join Date
    Jul 2007
    Location
    Stockton, Calif
    Posts
    88
    truck spent the day on the dyno being tuned, will have some low Boost dyno numbers tomorrow.
    http://www.denalitrucks.com/sm-files/mark-sig.jpg
    But Officer, I swear its just a vacuum leak.

    Those red things? those are smog pumps!

    2004 Sierra Denali ----- 2/4 drop
    LSX 438 TWIN TURBO

    LSX Block Video
    Block number 00370. Build Date 04/17/2007

  6. #136
    Join Date
    Dec 2003
    Location
    Azle,TX
    Posts
    3,682
    Cool I cant wait
    Vortec Performance Tuned
    LQ9 built 4L60 LTs and a billion miles on the speedo!

  7. #137
    Join Date
    Jul 2007
    Location
    Stockton, Calif
    Posts
    88
    I am going to copy and paste ricks comments and the dyno graph



    Ok, Ok, Ok. Everyone settle down.

    Ok, so here is the low down from today. I only have about 60 miles on the setup so I am keeping him on low boost for now which is about 12psi through the runs. The motor is pretty healty at a nice high ten low 11 AFR. But it does come alive when you lean her out. But thats not what I was going after. I just wanted to make sure the damn thing works. hehehe.

    Works it does. The graph I am posting is one of them, but not where I ended up. I wound up maxing out the dynos TQ capacity on the last few runs when I leaned it out for more power that it caused me to erase the few higher pulls. Oh well, I will have more chances later for more runs on another dyno. The Dyno maxed out because my dyno is rated at 3300ft lb divided by what ever gear ratio the chassis has. So since his truck has 4.10's in it, the dyno stopped at 810 ft lb. If the gear was different, say a 3.73, I could go alittle further with it. Not bad for low boost. Of course it kept making more as I leaned it out, but its ok. Its just a start anyways for this truck. So off the dyno to put the AWD case back in it. By the way, just in case you are wondering, I modifiied another AWD case to be a direct dyno case as a 2WD. Worked good.

    So here they are, just a start, I DONT WANT TO HEAR....it should have made more, or how come you didnt turn it up, or blah blah blah. IF you paid for it, you would be saying a different song. I have to make sure it all holds before we get crazy with it.

    So on the street, the AWD kicks so much ass. This truck hooks and goes. The boost on the dyno came full bore around 3000rpms. I tried to sized everything on this truck to act like his maggie did. I knew it would be hard to convert a maggie guy to a twin turbo guy. So I think I did a pretty good job with how the boost comes in. Its super quick, you step on it and it gets up like a bat out of hell. I didnt think it would hit that quick and my one handed driving quickly became two hands.

    So thats all. Simple....so far.

    BTW, the last graph I had before it got deleted said about 805TQ and 730+ HP.

    Rick


    http://www.denalitrucks.com/sm-files/mark-sig.jpg
    But Officer, I swear its just a vacuum leak.

    Those red things? those are smog pumps!

    2004 Sierra Denali ----- 2/4 drop
    LSX 438 TWIN TURBO

    LSX Block Video
    Block number 00370. Build Date 04/17/2007

  8. #138
    Join Date
    Dec 2003
    Location
    Azle,TX
    Posts
    3,682
    Damn....I think i just came a little!
    Vortec Performance Tuned
    LQ9 built 4L60 LTs and a billion miles on the speedo!

  9. #139
    ff_jeff Guest
    WOW!!! This thing might beclose to, if not at the top, of the fastest truck list!!! I bet the 60ft will be crazy. Also with the higher boost I bet it will run low 11's high 10's. this is one of the nicest trucks I have ever seen. Lucky dawg.

  10. #140
    Join Date
    Jul 2007
    Location
    Stockton, Calif
    Posts
    88
    also no traction problems with the AWD, Said it just took off like an arrow, I pick it up tomorrow
    http://www.denalitrucks.com/sm-files/mark-sig.jpg
    But Officer, I swear its just a vacuum leak.

    Those red things? those are smog pumps!

    2004 Sierra Denali ----- 2/4 drop
    LSX 438 TWIN TURBO

    LSX Block Video
    Block number 00370. Build Date 04/17/2007

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