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Thread: '05 rc 5.3, Radix, headers, cam

  1. #1
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    Just a quick post on a truck we did this week.
    The cam was very mild.
    Truck laid down 421hp/448tq.

    Get this though, I tuned it up, ran it, it only put 376/418, then I ran it four more times, and each pull resulted in more power without changing anything in the PCM, just goes to show you these pcm's do take a little bit of time to learn.

    The way hp was climbing, I'm sure 435hp would have been possible.

    oh ya, it had 8psi and a snowperf kit too.

    later,
    allen

  2. #2
    Join Date
    Aug 2004
    Location
    Magnolia, TX
    Posts
    3,259
    good numbers, that's a sweet little truck

  3. #3
    Join Date
    Apr 2005
    Posts
    4,229
    I am going to give all this up if I don't get AT LEAST that.
    Gone, but not forgotten!

  4. #4
    Join Date
    Oct 2006
    Location
    MCRD San Diego
    Posts
    64
    8psi with meth right? Is that with a 2.9 pulley on a 5.3? Wonder how well it'll turn out once learned complete...

    2004 Silverado SS

  5. #5
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    Well it went up from 376hp to 421hp in just a matter of 4 runs.
    When the customer came to pick up it, we went for a short test drive, it already felt 50% stronger than when it was just tuned.
    I'll ask him to come back after a 1,000miles, I bet it hits almost mid 400's.
    The cool thing is, it had over 400tq from 2400rpms, yikes, talk about a tire shredder.

    later,
    allen

  6. #6
    Join Date
    Jun 2004
    Location
    george west texas
    Posts
    3,694
    thats kinda like my numbers were at 8 also
    '13 silverado LT...stock

    '11 lt 4x4 z71..tvs1900

    '01 gmc twins 6.0 jakes 400 ladder bars w/ coilovers tuned by nelson performance

  7. #7
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    pretty darn close to 200hp over stock.


  8. #8
    Join Date
    Jan 2005
    Location
    Conway, AR
    Posts
    1,353
    Sounds like it has a pretty steady flat torque curve! We need a nice dyno around here!
    2009 Silverado, HPTuners, all stock.

  9. #9
    Join Date
    Apr 2005
    Posts
    295
    wow - "400tq from 2400rpms" - from what I understand Lightning was putting 399lb @ 4,000rpm...and that was at the crank ......tire shredder???? Nah, more like "what tires"?
    93 Ext Cab w/ 99' LS1, AFR 205cc heads milled to 59cc, G5X2 cam (232/240 .595/.608@114LSA), Edel LS1 headers, 6.0L intake
    Edel IAS shocks, Hotchkis front/rear antisway bars, 3.73 Axle w/ 8.5" -10-bolt w/ Eaton Posi

  10. #10
    Join Date
    Jun 2004
    Location
    george west texas
    Posts
    3,694
    here is my tranny breakin dyno numbers before the headers and exhaust...it was over 400 at 2500 rpm's as well:
    http://www.nelsonperformance.com/dynodata/...bud8fandyno.jpg
    '13 silverado LT...stock

    '11 lt 4x4 z71..tvs1900

    '01 gmc twins 6.0 jakes 400 ladder bars w/ coilovers tuned by nelson performance

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