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Thread: How fast?

  1. #1
    Join Date
    Sep 2007
    Location
    Ottawa, ON
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    911

    How fast?

    How fast have you had your truck going? Had mine a touch over 200k last week, 125-130mph, started floating pretty good so won't be going any faster til I do some suspension work! Couldn't believe how fast it hit it too, but definitely need. T56 with 4:88's!

  2. #2
    Join Date
    Nov 2007
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    THE MEAN STREETS OF OKLAHOMA
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    11,120
    152MPH still on both stages and was at the top of 3rd i let out before it shifted into OD. 4l80e with 4:10s, never felt any foating but wasnt paying attention, i was more focused on shawn shitting his pants and the big block i was chasing down rpms was at 6800 we were racing for a 1/4 mile but we both stayed in til about 1/2 a mile
    Last edited by Botlfed; 06-29-2012 at 09:27 PM.
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  3. #3
    Join Date
    Oct 2011
    Location
    San Antonio TX
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    127 mph in my rcsb at about 4300 rpm in 3rd lol . It was a loooooong straightaway


    4.8, TSP 220, 6L90 swap, 3400 Stall, 4.10s w/30" drag radial and T76 @ 16lbs.
    Best ET 11.54@114 w 1.52 60ft
    Raceweight 4905 lbs.

  4. #4
    Join Date
    Sep 2008
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    Arizona/Utah
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    125 in 3rd with plenty left my truck shifts out of 2nd at 88mph lol

  5. #5
    Join Date
    Oct 2011
    Location
    San Antonio TX
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    Quote Originally Posted by kerrige View Post
    125 in 3rd with plenty left my truck shifts out of 2nd at 88mph lol
    Cool mine does about 110-115 in second


    4.8, TSP 220, 6L90 swap, 3400 Stall, 4.10s w/30" drag radial and T76 @ 16lbs.
    Best ET 11.54@114 w 1.52 60ft
    Raceweight 4905 lbs.

  6. #6
    Join Date
    Apr 2009
    Location
    42141
    Posts
    714
    128 when stock with a programmer that only went up to 128mph speed limiter. GPS verified.

    idk since then. Gps feel on shifter in my car and broke.
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  7. #7
    Join Date
    Sep 2008
    Location
    Arizona/Utah
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    3,939
    Quote Originally Posted by RS/SS 4.8 View Post
    Cool mine does about 110-115 in second
    Holy crap I'm on taller tires than you and 3.42s! What gears do you have 3.08s? I guess my shift points are near stock though.
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

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

  8. #8
    Join Date
    Oct 2011
    Location
    San Antonio TX
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    1,150
    3.23s, 275/55/20. Mine shifts somewhere north of 6200 rpm i think lol.


    4.8, TSP 220, 6L90 swap, 3400 Stall, 4.10s w/30" drag radial and T76 @ 16lbs.
    Best ET 11.54@114 w 1.52 60ft
    Raceweight 4905 lbs.

  9. #9
    Join Date
    Sep 2008
    Location
    Arizona/Utah
    Posts
    3,939
    Quote Originally Posted by RS/SS 4.8 View Post
    3.23s, 275/55/20. Mine shifts somewhere north of 6200 rpm i think lol.
    Same tires different gears and your shift point is higher. As soon as I get my valve train upgraded I will be upping the shift points, but I figure by then I will have 4.10s and an 80e

    You really need to get ur 4.10s installed. What do you shift out of first at?
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

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

  10. #10
    Join Date
    Oct 2011
    Location
    San Antonio TX
    Posts
    1,150
    50-55 mph. Waiting for a response from a friend of mine to get the gears put in.


    4.8, TSP 220, 6L90 swap, 3400 Stall, 4.10s w/30" drag radial and T76 @ 16lbs.
    Best ET 11.54@114 w 1.52 60ft
    Raceweight 4905 lbs.

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