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Thread: 4.8 Almost stock Dyno Numbers

  1. #1

    4.8 Almost stock Dyno Numbers

    I dyno'd my silverado with a only a muffler swap at a local speed shop. I posted this info in my newbie thread but I figured I'd add it here, where it belongs. The truck put down 261hp/ 269torque on a Dynojet.
    I will be adding new numbers soon when I finish the exhaust on the truck. Stay tuned...

  2. #2
    Join Date
    Feb 2012
    Posts
    277
    thats really good numbers for a stock truck

  3. #3
    Join Date
    Aug 2008
    Location
    mansfield texas
    Posts
    3,520
    Wow thats more than my 5.3 with shorties, cai, and plugs and wires put down... dynos dont tell the whole story tho...

  4. #4
    Join Date
    Jan 2012
    Location
    DFW, TEXAS
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    596
    4l60 or nv35? RC or EC?

  5. #5
    Join Date
    Sep 2008
    Location
    Arizona/Utah
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    3,955
    Doood I didn't know RC and EC dyno differently? Must be a Dynojet thing.....
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

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

  6. #6
    Join Date
    Nov 2007
    Location
    THE MEAN STREETS OF OKLAHOMA
    Posts
    11,284
    longer drive shaft more rotating mass


    thats good numbers, my 5.3 did 259 stock, like bone stock.
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  7. #7
    4l60. RC. heavy 20s w/ 275 tires

  8. #8
    Join Date
    Jul 2011
    Location
    Newton, KS
    Posts
    46
    What gear are you guys doing your dyno pulls in? Wouldn't the stock speed limiter shut you down before you get a full pull in 3rd?

  9. #9
    Join Date
    Aug 2008
    Location
    mansfield texas
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    3,520
    Id like to see the dyno sheet myself
    Last edited by Crazy Blu; 03-17-2012 at 03:10 PM.

  10. #10
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,438
    VERY high for that combo. Good job I think.

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