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Thread: need help with tuning please!!!!!!

  1. #1
    Tuner in Training
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    need help with tuning please!!!!!!

    i have a 2001 tahoe that have done a swap from a 5.3 to 6.0. now im not a professional but i do have knowledge but i could use some help fine tuning my truck.Attachment 49318. the list of parts is as follows: lq4 block with 317 heads ls6 (yellow) valve springs , 7.400 harden pushrods, stock aftermarket dish pistons, stock 6.0 crank and stock 6.0 connecting rods, meillings high flo high pressure oil pump ls6 timing chain and gear set, 2002-04 corvette ls6 cam. 550"Int./.550" exh. duration: 204*Int/218*[email protected] Lift 117.5* Lobe Centerline, stock 6.0 rocker arms, NGK TR6 4177 spark plugs, MSX90 Massive 9mm Spark Plug Wires, Powerdyne supercharger model BD 11A ( 4 to 6 lbs of boost), and 4l60e with a stage2 rebuild($4500) 3.73 rear gears, aftermarket shorty headers no cats, removed front o2 sensors, 3 inch exhaust tubing, magnaflow 3inch in and out muffler, truck lq4 intake, 24.6 lbs injectors, removed egr valve,
    powerdyne fuel pressure regulator,aftermarket 90mm throttle body with spacer, 2004 electric 2 fan with factory fan relay and ran thru ecu 2 bar no screen MAF sensorLarry truck.hptLarry truck.hpt
    Last edited by larrybyars; 03-20-2015 at 04:57 PM.

  2. #2
    Senior Tuner
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    Quote Originally Posted by larrybyars View Post
    i have a 2001 tahoe that have done a swap from a 5.3 to 6.0. now im not a professional but i do have knowledge but i could use some help fine tuning my truck.Attachment 49318. the list of parts is as follows: lq4 block with 317 heads ls6 (yellow) valve springs , 7.400 harden pushrods, stock aftermarket dish pistons, stock 6.0 crank and stock 6.0 connecting rods, meillings high flo high pressure oil pump ls6 timing chain and gear set, 2002-04 corvette ls6 cam. 550"Int./.550" exh. duration: 204*Int/218*[email protected] Lift 117.5* Lobe Centerline, stock 6.0 rocker arms, NGK TR6 4177 spark plugs, MSX90 Massive 9mm Spark Plug Wires, Powerdyne supercharger model BD 11A ( 4 to 6 lbs of boost), and 4l60e with a stage2 rebuild($4500) 3.73 rear gears, aftermarket shorty headers no cats, removed front o2 sensors, 3 inch exhaust tubing, magnaflow 3inch in and out muffler, truck lq4 intake, 24.6 lbs injectors, removed egr valve,
    powerdyne fuel pressure regulator,aftermarket 90mm throttle body with spacer, 2004 electric 2 fan with factory fan relay and ran thru ecu 2 bar no screen MAF sensorLarry truck.hptLarry truck.hpt
    Before you waste a lot of time tuning it, your injectors are too small for those mods (supercharger). You say they are 24.6 but have them scaled as ~30 lb/hr in the tune. If you are running a FPR with a return you need to have the same value in all the IFR cells. And why remove the front O2s? You still have closed loop enabled in the tune along with all the DTC for them. You've applied a 2 bar SD OS but are still wanting to use a MAF? It is not failed in the tune and you mentioned you descreened it. Your VE table has all 0s in it from 110-210 kpa. And that is just for starters.

  3. #3
    Tuner in Training
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    ok thanks and im new to this tuner so what can i do to make it run a little better until i get the 42lbs green top injectors just something so i can let the motor break in. and this tune im using is just one i found on tune repository that i thought was close to what i had thanks for the help

  4. #4
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    ok thanks and im new to this tuner so what can i do to make it run a little better until i get the 42lbs green top injectors just something so i can let the motor break in. and this tune im using is just one i found on tune repository that i thought was close to what i had thanks for the help

  5. #5
    Senior Tuner
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    Just because a tune is in the repository doesn't mean it is good.

  6. #6
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    Ok thanks so which injectors do you recommend I have a friend that's willing to give me some 12580681 30lb or should I go ahead and order the green top 42lb

  7. #7
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    42lb injectors will be on the limit, 60lbs will be better for boosted combo