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Thread: 1990 LSX Silverado Compound boost turbo project!

  1. #1

    1990 LSX Silverado Compound boost turbo project!

    Wanted to share my project with everyone. We have been working on this set up for some time now and its just about wrapped up. It has a custom one off KBracing compound turbo set up. Kyle @KBracing designed the kit and picked out the turbos as well. We are excited to see what the set up is going to do. It may work it may not but I'm ready to find out. The only problem I see with this set up is keeping the boost down. These compound kits are usualy seen on diesel trucks and run really high boost pressures. Right now we have it set up for 15-20psi but I'm sure we will need to adjust the waste gates to keep it that way. The motor is a stock 4.8L with rings gaped for a turbo application and head studs. Hope to have some running and track videos soon. I'm hoping for extremely quick throttle response and good mid and top range power. We will see how long this motor last. haha







  2. #2
    Join Date
    Dec 2006
    Posts
    4,127
    should be very interesting! good luck with the finished product! patiently waiting on the end result
    Simple: 408 on steroids!
    single digits coming soon!

  3. #3
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    7,112
    Now this I want to see
    2006 Silverado
    Little Black Bitch

  4. #4
    Join Date
    Apr 2011
    Location
    Texas
    Posts
    296
    ooo I ready to see the pros and cons of this one.
    2006 Silverado aka (Bad Bitch)
    K&N CAI, Diablo Predator, muffler delete, and a vette servo. 14.7x @ 93 mph (sold)

    1998 SS Camaro aka (Silver Bullet)
    LS6 intake, ported TB, LTs, ORY, cut out, and a pantie dropping tune by Nelson. 12.6 @ 110 mph 327 hp 347 tq

    2011 ecsb silverado aka (silver sleeper)
    forged 6.2 and a small snail

  5. #5
    Join Date
    Nov 2007
    Location
    Pittsburgh, PA
    Posts
    6,868
    this should be interesting but willing to bet the end result is the same as it would of been if it only had one turbo on it.
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  6. #6
    You may be right George. Im just waiting for my base tune from Patrick G to come in so I can fire it up. Im wondering how my 190# injectors are going to idle. Kyle said 1000hp or bust!! Im leaning towards bust hahaha!!

  7. #7
    Join Date
    May 2010
    Location
    so cal.
    Posts
    96
    Interested in seeing how this works on a gasser. I feel like I'm over on a diesel forum looking at a build thread.
    SOLD:1992 ECSB Silverado lm7 5.3 Swap, TR220 cam, Circle D 3200stall, CBM street tune, Schoenfeld LT's, LS1 efans, transgo hd-2 60e, custom CAI, Autometer gauges

    Best 1/8 E.T. 8.86 @ 77.8 on 275/60/15 MT ET Streets with 1.92 60 ft.

    2000 RCSB 4x4 Lq9 swap...stock except mild 4l65e....for now

  8. #8
    Join Date
    Aug 2007
    Posts
    756
    I've thought about doing this. Can't wait to see how it runs.

  9. #9
    Join Date
    Nov 2007
    Location
    Pittsburgh, PA
    Posts
    6,868
    Quote Originally Posted by vic View Post
    You may be right George. Im just waiting for my base tune from Patrick G to come in so I can fire it up. Im wondering how my 190# injectors are going to idle. Kyle said 1000hp or bust!! Im leaning towards bust hahaha!!
    the compound setup works for diesels as they cant spool the large enough turbo properly, on a gas setup where the max most see is 25 psi and some extreme builds see 40 those numbers are easily attainable by a single or a twin setup. Fastest LSx and 2nd fastest LSX are both single turbo setups and around 22 psi

    the heat from this setup will probably kill any power as engine bay temps will probably kill IATS but for thinking outside the box its a badass setup.
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  10. #10
    Join Date
    Aug 2008
    Location
    mansfield texas
    Posts
    3,520
    Bunch of quick pustangs and lightning a run compounds so def not just a diesel thing.

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