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Flat Fender Re-power Options

Discussion in 'Builds and Fabricators Forum' started by 73 cj5, May 18, 2019 at 12:41 AM.

  1. May 18, 2019 at 12:41 AM
    73 cj5

    73 cj5 Destroyer of Jeeps Sponsor

    Clinton, Mississippi
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    So what's your engine choice in lieu of the L/F 134? I don't think either 134 will pull 33-35's with 4.88's and an OD.
    I'm spitballing here but I reckon most will suggest the 225 or 231 then the 4.3 v6. I see we have a few unique specimens on the forum. E.g. volvo, tdi, and Merc 3.7

    So what engine and why.

    A few thoughts I had....
    1. 302 from an exploder
    2. SBC (I have most of the parts to shoehorn one in a jeep.:sneak:)
    3. Ford Flathead
    4. 2.3L Ford
    5. diesel
    6. Six cylinder
     
  2. May 18, 2019 at 1:05 AM
    tymbom

    tymbom Member

    Siskiyou Co.
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    Jun 13, 2012
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    542
    I'm partial to a SBC...
    There's no good diesel options that excite me...
     
  3. May 18, 2019 at 1:20 AM
    jzeber

    jzeber Sponsor Sponsor

    Morgan Hill, Ca
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    Nov 15, 2003
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    My vote would be a newer fuel injected 4.3
     
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  4. May 18, 2019 at 7:33 AM
    txtoller

    txtoller Member Sponsor 2019 Sponsor

    Weatherford, TX
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    I agree, the SBC or 4.3 are probably, the easiest and most common. For cool factor the Flat-head would be your Huckleberry!
     
  5. May 18, 2019 at 7:59 AM
    scott milliner

    scott milliner Master Fabricator

    Seattle Wa.
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    Dec 17, 2002
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    I agree.
     
  6. May 18, 2019 at 11:26 AM
    Jw60

    Jw60 Midwest traveler

    Sedalia MO.
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    Oct 5, 2018
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    124
    All depends on usage. I did 4.3 and that's the way to go for 150-190hp and 260ftlbs any more hp go with an sbc it will cost the same but take a little more time and effort for fitment.
    This and bam bam are my favorites
    CJ2A Build Deadline FCT 2017
     
  7. May 18, 2019 at 12:59 PM
    Jrobz23

    Jrobz23 Member

    Northern, WI
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    Oct 3, 2016
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    This. What is the 90th % intended use?
     
  8. May 18, 2019 at 1:19 PM
    Iandavidh

    Iandavidh Member

    California
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    Sep 24, 2018
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    73
    That new r2.8 cummins looks like a rad little motor but it is definitely pricey.
     
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  9. May 18, 2019 at 1:25 PM
    Jrobz23

    Jrobz23 Member

    Northern, WI
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    Oct 3, 2016
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    While VERY true, you can buy a Roxor for the price of this swap.. in parts alone.

    Cummins motors are awesome, but they priced the 2.8 way too high.
     
  10. May 18, 2019 at 2:13 PM
    Rich M.

    Rich M. Shoe pusher

    Maryland
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    501
  11. May 18, 2019 at 4:34 PM
    Rich M.

    Rich M. Shoe pusher

    Maryland
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    Mar 23, 2008
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    501
    I think the first question is what transmission? Personally I wouldn't put a dime in a t90 with what you already have described.
    4.3, sbc go together with an sm465-th350/400 and one economical adapter. The 302 with a t18/ maybe a np435 / c4 same. All of the above are regularly done. Expect cutting, welding, driveshafts, steering , crossmembers etc.
    While I have affection for my odd and evenfire 231's honestly I don't think they are the most economical anymore. A power steering bracket can run you $100 alone.
    IF I ever do a repower it will be an injected 4.3 it's the dauntless of the day now and will be for at least another decade.

    Having said that there is a guy near me that has pulled an 4cyl turbo diesel out of an Iveco box truck for his Wrangler.....
     
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  12. May 18, 2019 at 6:30 PM
    Jrobz23

    Jrobz23 Member

    Northern, WI
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    The T90 is fine depending on his intended use. They are small, strong for their size, mate to the Spicer18, have a host of adapter options, and are very cheap.

    I’m partial to inline 4s, though I don’t understand Novaks draw to the Ford pinto motor. Plenty of other I4s out there, specially newer Ford motors.

    The 231 and 4.3 swaps are nice in that they involve less engineering than other choices (you can retain the T90 and cowl).
     
  13. May 18, 2019 at 6:58 PM
    Twin2

    Twin2 wasn't me Sponsor 2019 Sponsor

    Virginia Beach, VA
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    back in the day . the pinto engine was a easy swap
    now a days it's just another motor that's out of date
    now don't get me wrong . I would do it , if it was a good engine and it served my needs
    chevyII have a 4 cylinder too
     
  14. May 18, 2019 at 7:20 PM
    Chilly

    Chilly Active Member 2019 Sponsor

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    4.3L. I wouldnt repower to an obsolete engine. If I had a Jeep with a V6 Buick I'd rebuild/replace with same, but I wouldnt put one where it didnt originate
     
  15. May 18, 2019 at 7:30 PM
    givemethewillys

    givemethewillys Sponsor Sponsor

    New Kent, VA
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    I always wanted to do a ford Lima 2.3 turbo out of a Thunderbird. Apparently the pinto 2.3 was a popular swap in jeep way back in the day. It is a pretty adaptation to the t90 too.
     
  16. May 18, 2019 at 7:31 PM
    RATTYFLATTY

    RATTYFLATTY I think you need a little more throttle

    Central MN
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    Oct 23, 2007
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    I'll throw in, but I must say that I'm a snowball rolling down the hill type of guy. I like a V8 if for nothing more than the sound and the feel when you get in it. I had a 302HO in my 48 and my dad has a 260 in his 46. The V6 world(I live in it now, 225OF)will deliver plenty of power for whatever you need. The Vortec 4.3 is a great option. I would look farther down the driveline and do a few upgrades while the engine-ectomy. I would consider a T-18 trany upgrade along with a rear axle(shafts at least)upgrade and front brakes, disk or big drum.
     
  17. May 18, 2019 at 8:21 PM
    73 cj5

    73 cj5 Destroyer of Jeeps Sponsor

    Clinton, Mississippi
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    I won't waste my time with a T90. If I go 302 I would run a T18/NP435/Top loader and D18. My "dream" setup would be a SBC, Muncie car 4 spd (M22:sneak:), and D18.
    This is primarily for street use and at best mild off roading. Of course I'd do all the usual mods: 4 wheel disk, saginaw steering, dual reservoir mc, etc.
    V6 would be the best fit and have sufficient power for my needs. Lots to think about.
     
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  18. May 18, 2019 at 9:59 PM
    jpflat2a

    jpflat2a what's that noise?

    Riverside CA
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    I'd research where the shifter for the M22 would end up being located first.
    You'd probably change your direction.
     
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  19. May 18, 2019 at 11:41 PM
    Jrobz23

    Jrobz23 Member

    Northern, WI
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    Second after use case, you should decide what % of your Jeep you want to keep original. Be honest with yourself. If you throw a V8 in there, that % could end up much lower than you really want.
     
  20. May 18, 2019 at 11:54 PM
    73 cj5

    73 cj5 Destroyer of Jeeps Sponsor

    Clinton, Mississippi
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    Good point.
    Body, suspension, and axles is all that'd be left un-modified. It was never all original to start with and my lust for a stock jeep isn't quite there anymore.
     

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