4.8L build to reach 375-385 hp, all motor!

Discussion in 'Performance & Fuel' started by Dontlookforme, Nov 30, 2010.

  1. Dontlookforme

    Dontlookforme New Member

    Looking to build a 4.8L Monster! I got one out of a junkyard and its sitting in my shop. Im pritty sure that the 4.8L, 5.3L, 6.0L motors are from the same cast iron block! i know that the 6.0L motors now make 345+ hp. So my goal for making 375-385 hp, is a possibility? Im looking to bore and stroke the 4.8L 292ci out to a 366ci or somthing as close as i can. While still having enough meat left to reuse the motor again. Any ideas or suggestions would be great!

    Thanks jason
  2. murdog94

    murdog94 New Member 1000 Posts 100 Posts

    Obviously a cam, and some porting on the heads, high output Injectors, better intake.
  3. stephan

    stephan New Member 1000 Posts 100 Posts

    What kind of fuel are you planning on running Jason? Pump gas?
  4. Dontlookforme

    Dontlookforme New Member

    Yes, pump gas. 93 octane.
  5. silveradotrailblazer

    silveradotrailblazer New Member 1000 Posts 100 Posts

    I believe the 4.8 and the 5.3 are the same block and the 6.0 is differant. You can bore the 6.0 more than the 4.8&5.3. Theres a reason you see most people using the 6.0 block for performance engine building.
  6. KWG08VMI

    KWG08VMI New Member 100 Posts

    I would go a little farther than just porting and polishing the heads, like maybe an entirely new set. I would start looking at full builds on LS1s and LS6s and see what you like and start from there.
  7. silveradotrailblazer

    silveradotrailblazer New Member 1000 Posts 100 Posts

    Also on 4.8 & 5.3's theres a limit to what cylander heads you can use because of there small cylinder bore.

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