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Thread: Is a 5.3 to a 8.1 possible?

  1. #1
    Join Date
    Dec 2003
    Location
    West TX
    Posts
    16
    Just checking to see if its been or can be done without breaking the bank doing it.
    Sometime in 2004 I wanna do a swap just still figuring out what I wanna do right now.

    Any suggestions?
    '99 Silverado Z71 Extended Cab
    6" Pro Comp Lift w/Ford Keys
    325 60 18R Nitto Terra Grapplers
    Eagle Alloy Rims
    & Hummer Tires on blk Rock Crawlers
    Ranch Hand dressed, 7% tint
    Gibson Headers
    Hypertech Tuner
    True Duals
    Bumpin sound system

    <><

  2. #2
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    I was hoping someone would reply to this.

    I&#39;m sure it&#39;s possible, but a different harness would be in order, right guys?
    The 5.3L or similar pcm should be able to control the efi.

    I would be interested to see someone try this. I know this is a torque, pulling monster engine, wonder how it would rev and hold up at the track. Hell, the marine guys are making tons of power from this engine. I would think if you&#39;re looking for a daily driver and mileage is a concern, throw this swap away now, lol.

    How much power are you thinking about getting from this? I would make an excellent tow vehicle or for a 4x4 application.

    later,

    allen

  3. #3
    Join Date
    Nov 2003
    Posts
    5
    Originally posted by farmtruc@Jan 6 2004, 10:00 AM
    I was hoping someone would reply to this.

    I&#39;m sure it&#39;s possible, but a different harness would be in order, right guys?
    The 5.3L or similar pcm should be able to control the efi.

    I would be interested to see someone try this. I know this is a torque, pulling monster engine, wonder how it would rev and hold up at the track. Hell, the marine guys are making tons of power from this engine. I would think if you&#39;re looking for a daily driver and mileage is a concern, throw this swap away now, lol.

    How much power are you thinking about getting from this? I would make an excellent tow vehicle or for a 4x4 application.

    later,

    allen
    I actually asked the same question on another board and people "looked" at me like I was on a crack pipe

    Pretty much the statement of the day was it is too expensive, to time-consuming, and too much a PITA to do. Now, on the other hand, I am sure that of all the speed-freaks out there this had to have been done somewhere by now...

    I dropped the inquiry because I don&#39;t think anyone took my question seriously since alot of people just throw a 6L in there. I, however, still would like to know as well. Almost 500 cubes, to me with all the torque, would not necessitate a blower. I guess it would come down to cost of a built 6.0L w/ Radix/Whipple vs. this BB swap.
    Dan in Dallas
    &#39;06 Vortec Maxx Crew Cab

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