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Thread: new best for the 4.8

  1. #1
    Join Date
    Jan 2009
    Location
    san antonio, tx
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    190

    new best for the 4.8

    Ran the truck last night again at SAR.

    First run was a 15.15 so I had high hopes of running a 14.9 as the night went on. Didn't happen.

    15.13 @ 90.6 mph was the best.
    2.33 60 ft.

    Back to the HpTuners forum to see how I can get this throttle to open faster. I'm very happy with the MPH but its still a dog off the line.

    2008 RCSB Sierra
    4.8L, 3.73, G80
    full weight except tail gate.
    4520 race weight
    all stock except tuning via hptuners.
    ran 15.6 stock.
    2008 Black RCSB Sierra 4.8L
    14.78 @ 90.93 mph
    My Garage

  2. #2
    Join Date
    Apr 2007
    Location
    Pittsburgh, PA
    Posts
    207
    Damn... thats impressive for just a tuned 4.8, get yourself some bolt ons and youll be in the 14s easy!

    Update that sig

  3. #3
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    Very good MPH for the time. Get the short time down and you're in the 14's. Bolt-ons would go a long way. Good job.

  4. #4
    Join Date
    Sep 2005
    Location
    Austin Tx.
    Posts
    13,138
    you def. have a lot of potential. Youre only gonna get faster. got you up on the list
    1951 3100
    1984 C10

  5. #5
    Join Date
    Jan 2009
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    san antonio, tx
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    Quote Originally Posted by duckysbht View Post
    you def. have a lot of potential. Youre only gonna get faster. got you up on the list
    thanks man!
    2008 Black RCSB Sierra 4.8L
    14.78 @ 90.93 mph
    My Garage

  6. #6
    Join Date
    Jan 2009
    Location
    san antonio, tx
    Posts
    190
    new time, no new mods, thank you -500 DA

    2.338
    9.7644 @ 74.50 mph
    15.042 @ 91.35 mph
    2008 Black RCSB Sierra 4.8L
    14.78 @ 90.93 mph
    My Garage

  7. #7
    Join Date
    Apr 2008
    Location
    Okeechobee, Fl
    Posts
    2,007
    Those are really good times!
    2006 extended cab, 6.0 swap, full bolt ons SOLD
    2011 ECSB, 6.2, 6 spd, 3.73, 5" lift, 33" nitto, limo tint, debadged, volant CAI, muffler delete, black bear tune 14.0 @ 98 on the 33'sSOLD
    2007 TBSS AWD, cam, stall, built trans, N2OSOLD
    2006 RCSB cammed LQ9, full exhaust, 3200 stall, 2-4 drop
    Quote Originally Posted by farmtruc View Post
    "if i have to explain, you don't get it"

    49 Ford F1
    355 chevy / turbo 350 / 12 bolt posi / camaro subframed

  8. #8
    Join Date
    Sep 2005
    Location
    Austin Tx.
    Posts
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    nice times! get that 60ft. down. Do you spin off the line?

    got you updated btw.
    1951 3100
    1984 C10

  9. #9
    Join Date
    Jan 2009
    Location
    san antonio, tx
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    Quote Originally Posted by duckysbht View Post
    nice times! get that 60ft. down. Do you spin off the line?

    got you updated btw.
    nope, the throttle blade is so slow to open on the GMT900's that it just kind of limps off the line. I think i've decided to get a 3k converter as the first mod since I think it will do the most for my ET.
    2008 Black RCSB Sierra 4.8L
    14.78 @ 90.93 mph
    My Garage

  10. #10
    Join Date
    Sep 2005
    Location
    Austin Tx.
    Posts
    13,138
    Quote Originally Posted by nighthawk View Post
    nope, the throttle blade is so slow to open on the GMT900's that it just kind of limps off the line. I think i've decided to get a 3k converter as the first mod since I think it will do the most for my ET.
    PERFECT! You should get some slicks to. Just to have. Find some used ones like I did. I dropped aabout a 1/2 second off my time just from the slicks
    1951 3100
    1984 C10

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