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Thread: My Head ~ My Aching...'er 4.0 haed

  1. #1
    Join Date
    Mar 2013
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    Portland
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    Default My Head ~ My Aching...'er 4.0 haed

    OK
    What year did they switch from Cast Iron to Aluminum?
    ...like '90/'91 right?
    Are 2000/2001 a good performance upgrade for a '93?
    ...or I could reuse my ported '89. But even ported, I'm not feeling performance gains.

    What I'm thinking is, when I nab that 2000 intake, I could grab the head too.
    Plus I'm going to get a performance exhaust manifold ~ 2.25"/2.5" all the way - no cat.

    Just thinking out loud
    Be strong when you are weak.
    Be brave when you are afraid.
    Be humble when you are victorious.
    But be a badass everyday!
    . . . . . . . . . . . . . . .

  2. #2
    Join Date
    Sep 2009
    Location
    Chico, CA
    Posts
    29,847

    Default Re: My Head ~ My Aching...'er 4.0 haed

    The 2000 intake was much better, but the head was detuned for emissions. Don't ask me how that works, but GM did it too. I can't remember which year was the best head, but IIRC 93 - 94
    230 hp 4.3L Chevy
    Built 4L60E with manual lockout
    Atlas 4 speed
    Griffin radiator
    On board air
    Warn 9.5ti on custom bumper
    7.5" RE front and bastard pack rear on custom long arms
    30 gal gas tank
    lockers
    And a bunch of other stuff

  3. #3
    Join Date
    Mar 2014
    Location
    omaha
    Posts
    449

    Default Re: My Head ~ My Aching...'er 4.0 haed

    I have a 2000 that I had to replace the head on. in doing research I found what I thought was that the 2000 was the bad head. The exhaust ports are slightly smaller leading it to overheat and crack. at least that was how I understood it. in fact I thought I had read of many guys swapping that 2000 head for a 1998 head because of that. in fact I call that 2000 head Sir Popsalot!

  4. #4
    Join Date
    Mar 2013
    Location
    Portland
    Posts
    1,430

    Default Re: My Head ~ My Aching...'er 4.0 haed

    The '93 I picked up has the msd coil, wires, and distro cap.

    I'm looking at a clean (I'll clean and tweak more) 2000 intake.
    I have the neon injectors on my '89 that I'm gonna clean up and reuse
    ...and just ordered a Chrysler #4418850 fuel pressure regulator ~ bumps pressure 10 psi to 40 (I believe stock is like 31 or 32) 34 from RockAuto / should be a direct swap...

    Looking (by mid summer) to pick up a long tube exhaust manifold, + 2.5" (no cat) all the way back exhaust.
    And fall +/- upgrading the cam.

    More air, more fuel, better atomization, + better spark should add a little seat of the pants increases... maybe
    Be strong when you are weak.
    Be brave when you are afraid.
    Be humble when you are victorious.
    But be a badass everyday!
    . . . . . . . . . . . . . . .

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