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Thread: 6.2L Silverado extcab, 2wd - SilverSleeper

  1. #1
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038

    6.2L Silverado extcab, 2wd - SilverSleeper

    Kevin's truck laid down some good numbers!

    398.9hp and 394.9tq with just a NP Tune, no cats, magnaflow muffler. (stock cai/filter)

    That was just the street tune, we all know we can get more on the dyno, not because the dyno is better to tune with, but because less load can be applied, more timing can be had, etc etc.

    Gonna break 400hp real quick with a stock engine and then we're installing this:

    large300-116.jpg

  2. #2
    Join Date
    Nov 2007
    Location
    THE MEAN STREETS OF OKLAHOMA
    Posts
    11,119
    Sweet deal, wish i could break 400.
    THEY CALL ME G.

    AZRAEL
    01 GMC REG CAB BUILDING
    06 SILVERADO SS 80E 3200 YANK LS3 TOP, DD
    2013 POLARIS RANGER CREW LE EPS

    The difference between winning and losing, is having a 2nd stage.
    Quote Originally Posted by A PATRIOT View Post
    "MOLON LABE"

  3. #3
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,005
    Those are the highest numbers I've seen out of a 6.2 yet for being that stock. Too bad I'm already at 500 eh?


    Just giving you hell Kevin. Good numbers for sure.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  4. #4
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    just found out, has a 90mm tb too.

  5. #5
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    adjust a/f ratio and timing.
    405/393 final numbers.
    ran it twice back to back.
    IMG_9476 (Copy).jpg




    here's the first dyno pulls, did three back to back.
    IMG_7069 (Copy).jpg

  6. #6
    Join Date
    Jan 2008
    Posts
    8,031
    damm thats nice...in for some results after intake swap

  7. #7
    Join Date
    Aug 2008
    Location
    mansfield texas
    Posts
    3,512
    Hell ya this thing is going to be sik!

  8. #8
    Join Date
    Mar 2003
    Location
    San Marcos Texas
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    4,393
    Nice job! Kevin that is one hell of a setup over 400 hp NA!

  9. #9
    Join Date
    Sep 2010
    Location
    Texas
    Posts
    2,112
    Hell yeah, look at that beast laying it down on the dyno, them dynos are so cool, I always love to see everyone's dyno #s.

    No wonder she's been running low 13s in 100+ degree heat with a race weight over 5000+ lbs.

    80 to 150 pulls are fun in the Sleeper, top speed has been 154 so far.

    ***Those #s though, WOW, are you guys sure you didn't already install the top secret NP grind cam and forgot?
    2013 EC Silverado aka redruM (Just a couple bolt ons.)
    2007 RC Silverado aka ?
    1998 Trans AM aka Red Dragon

    "Your pull your truck to the track on a trailer, I race you with a truck that pulled a trailer to the track."

  10. #10
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,005
    Just out of curiosity, what happened to the CAI you had? I thought you had that on there. I'm still interested in owning it.

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


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