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Thread: Truck not running right

  1. #1
    Join Date
    Jan 2009
    Location
    Las Cruces, NM
    Posts
    174

    Truck not running right

    Just dont think my truck is still running full potentail after different engine. It seems to me my stock 6.0 was faster then Iron 5.7 with cam heads headers throttle body ported intake manifold. Both engines where supercharged. Stock 6.0 no tune ran a 14.5 just with predator tune and whipple computer. Dont think this setup can even get close. What you guys think. Also adivise would be great.
    www.youtube.com/watch?v=IXyxWbqpK-Q
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

  2. #2
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    6,994
    We need more details. Yes it's pathetically slow, but why is beyond me
    2006 Silverado
    Little Black Bitch

  3. #3
    Join Date
    Jan 2009
    Location
    Las Cruces, NM
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    Like what details?
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

  4. #4
    Join Date
    Jan 2008
    Posts
    1,550
    so thats with the supercharger??

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  5. #5
    Join Date
    Jan 2009
    Location
    Las Cruces, NM
    Posts
    174
    yes at 7psi
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

  6. #6
    Join Date
    Jan 2008
    Posts
    1,550
    Do you have access to a wideband and Hptuners so you can log it? Is it throwing any codes?

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  7. #7
    Join Date
    Jan 2009
    Location
    Las Cruces, NM
    Posts
    174
    No I dont have any of that. Only code it has is low traction. Tried getting it off with the predator but comes back only when i check it with the predator no service engine soon.
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

  8. #8
    Join Date
    Sep 2008
    Location
    Arizona/Utah
    Posts
    3,939
    You need a proper custom tune. That is your biggest issue.
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

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

  9. #9
    Join Date
    Sep 2011
    Posts
    1,235
    Quote Originally Posted by kerrige View Post
    You need a proper custom tune. That is your biggest issue.
    ^^THIS^^ without being able to log data to see what's going on you are really chancing screwing up your engine! Especially since its forced induction!

  10. #10
    Join Date
    Jan 2009
    Location
    Las Cruces, NM
    Posts
    174
    I got a nelson tune and they tuned it before without any issues and I did get a re tune for the new engine. So the guess is only the tune or what else can it be.
    Wanderer Racing

    2002 Sierra Denali: iron 5.7,cam,243 heads port,headers , true duals, AWD, 42injectors, Nelson Tune, snow performance stage 3,100 Shot of nos, 3200 circle d

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