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Thread: 4.8 differences over the years...

  1. June 12th, 2009 #1
    DURAtotheMAX
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    Default 4.8 differences over the years...

    So the 4.8 was 255hp when it first came out in 99...in 2007, the last of the GMT-800 4.8's were 285hp IIRC.

    What did they change besides the tune? AFAIK the cam and heads today are still the same as they were in 99??

    Can I run a newer tune with an older engine and get more hp? Sorry I only know about getting power via tuning out of diesels...

    thanks
    ben
    2005 Silverado, CC/SB, 4x4, LT, LILLY/Allison
    12.9s @ 108 mph

    many thanks to Ross and Paul
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  2. April 23rd, 2011 #2
    classic_speed_and_customs
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    Default

    Same questiion. Glad to see the answer lol. Ill keep looking.
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