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Thread: 1990 LSX Silverado Compound boost turbo project!

  1. #21
    nice build, in for results

  2. #22
    Join Date
    Mar 2003
    Location
    San Marcos Texas
    Posts
    4,393
    Cool idea. I'm in for some numbers!
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  3. #23
    Base line tune is in from Patrick G! Uploading the tune today and Ill post some idle vids tonight. Still talking with Patrick but I think we may be good for a dyno tune next Thursday . Im excited to see how this set up performs.

  4. #24
    Truck is up and running!! Ill post some idle videos tomorrow with some better light. Sounds nice and smooth. Lets hope it runs that way to.

  5. #25
    so are yall still tunning it this weekend?

  6. #26
    Quote Originally Posted by crusher View Post
    so are yall still tunning it this weekend?
    Headed to Pats on Monday for some dyno tuning. Small video of the truck idling with 190 pound injectors
    http://m.youtube.com/watch?feature=c4-feed-u&v=2kTt3V-MoXE
    Last edited by vic; 08-31-2013 at 10:29 AM.

  7. #27
    sounds good man and good luck on monday

  8. #28
    Just got back from the tuner and I ccouldnt be happier! We had some issues with the wastegates opening to soon and couldnt build boost. 12.8psi was the max we could get and it made 650hp. Im excited to get the wastegates fixed and get closer to 20psi. Should be a beast!!

  9. #29
    Join Date
    Sep 2008
    Location
    Arizona/Utah
    Posts
    3,939
    650 on 13lbs that's great. Congrats. Did it spool quickly as desired?
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

    waiting to go in... 3.90s, 214/220cam

  10. #30
    Join Date
    Apr 2005
    Location
    The Woodlands, TX
    Posts
    369
    Didn't spool as quickly as we wanted, but I think it needs a stiffer spring in the top WG so the small turbo will do more work before it starts bypassing. Should bring the boost in a lot quicker. Needs some tweaking, but pretty good number for the first shot out of a 4.8 I'd say.

    Need to put a boost controller on it so we can turn it up even more!
    01 ECSB 1/2 ton 4x4 6L GMC
    11.03@127
    KB Racing Borg Warner S475 turbocharged
    http://i3.photobucket.com/albums/y57/Kbracing96/kbracing96copy-1.jpg

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