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Thread: 4.8L Project Horsepower - One step at a time

  1. #11
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,117
    Quote Originally Posted by Quik View Post
    that ... about the same torque. very interesting

    Here's the next dyno. This is running 87oct and tuned.
    HP is decent, but torque is better!
    What you'll feel when you hit the gas is the 20+tq across the power band.

    Max Torque increase is 20tq at max torque.
    Max HP increase 11hp.
    The most notable thing is, power has increased across the entire power band with 87oct

    Dyno results Tuned:


    (note: the a/f gauge isn't hooked up and doesn't interface with the dyno computer)

  2. #12
    Join Date
    Mar 2003
    Location
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    Ok, next dyno.

    Not much to write about. We added a UPD cold air intake.
    This setup utilizes the stock bottom air box. We cut a hole in it to allow more air to enter, than what the fender allows.

    HP gain is typical. Added 5hp.



    Next: Cam was installed today 03-18-09.
    We'll dyno it tomorrow then install the longtube headers, then dyno once again.

    If you guys are interested, we're installing a 3600 yank converter as well, we'll compare the hp loss when this is added.
    Even though hp decrease is expected, 0-60 and 1/4 mile times will improve signficantly.

    Stay Tuned,
    allen

  3. #13
    Join Date
    Nov 2007
    Location
    Pittsburgh, PA
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    6,868
    very nice numbers!!!! seems to be my lack of compression and man stick suffers vs that chart at 4k.

    you get that cam and LTs on the 4.8 and i bet it rips
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  4. #14
    Join Date
    Aug 2006
    Location
    Houston, TX
    Posts
    50
    Very cool, a realistic build w/ real #'s to back up the gains of each part. Subscribed....
    05' SIERRA RCSB

  5. #15
    Join Date
    Jan 2008
    Posts
    8,203
    damm nice,but link dont work

  6. #16
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,438
    See George. Stock 4.8 with a hella lot less miles than my V6 has 10 more TQ and 40 more HP at the wheels. Not much different STOCK.

  7. #17
    Join Date
    Nov 2007
    Location
    Pittsburgh, PA
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    Quote Originally Posted by GasGuzzler View Post
    See George. Stock 4.8 with a hella lot less miles than my V6 has 10 more TQ and 40 more HP at the wheels. Not much different STOCK.
    i was talking flywheel not wheelhp
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  8. #18
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,438
    Hence my mentioning my six making 162 0r 163 wheel power on a 170 flywheel rating.

  9. #19
    Join Date
    Nov 2007
    Location
    Pittsburgh, PA
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    6,868
    Quote Originally Posted by GasGuzzler View Post
    Hence my mentioning my six making 162 0r 163 wheel power on a 170 flywheel rating.
    mine said 180 or was it 190 who cares about them v6s they are DDs
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  10. #20
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,438
    Yep...and yours being a 4WD and a different year it prolly has more. Is yours an X or a W?

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