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Thread: LS vs JZ vs FI BMW pros/cons

  1. #51
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    High pitched rasp. Not a fan. It sounds like a Honda.

    Status: Someone put glitter in my oil. Wait. Why's all my oil outside the engine? What's that knocking?

  2. #52
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  3. #53
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    I fell in love with Ls swaps in a fc rx7, dat torque curve was wild. A year later I bought mine to rebuild as a buddy was putting one in his skyline. I went out with him testing and it was fucking awful, the motor was fine but he ran a mustang t5 so the gearing was the worst thing ever. I started doubting my swap then, but decided to push through because I've never done something this in depth by myself. I'm hoping that by using the stock zf trans I'll be able to keep the car geared the same as my m3, and have the only real difference be the power/torque of the ls. I'll be sure to post how it drives when it's done, but who knows when that will be at this point lol

  4. #54
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    What rear ratio? I think you need something around a 4:1

    Status: Someone put glitter in my oil. Wait. Why's all my oil outside the engine? What's that knocking?

  5. #55
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    Mustang had a 3.71, he tried with a 4.36 and a 4.08 and both were shitty, 436 just hit limiter in second super quick but didn't have enough power to spin tire in 3rd, and 408 was more driveable on small stuff but didn't have enough rev range to do banks

  6. #56
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    Quote Originally Posted by Mikestokman View Post
    I fell in love with Ls swaps in a fc rx7, dat torque curve was wild. A year later I bought mine to rebuild as a buddy was putting one in his skyline. I went out with him testing and it was fucking awful, the motor was fine but he ran a mustang t5 so the gearing was the worst thing ever. I started doubting my swap then, but decided to push through because I've never done something this in depth by myself. I'm hoping that by using the stock zf trans I'll be able to keep the car geared the same as my m3, and have the only real difference be the power/torque of the ls. I'll be sure to post how it drives when it's done, but who knows when that will be at this point lol
    Quote Originally Posted by protomor View Post
    What rear ratio? I think you need something around a 4:1
    he shouldn't need to change the rear end at all.
    the trans and diff don't know the difference between an LS and an m5x. if the LS's power curve is similarly shaped to the m5x, it'll be just like a more powerful m5x. i went with the GTO internals on my t56 because the gearing was closer to the zf than the fbody box most everyone else uses.

    after putting a few hundred miles on my swap, i'm thinking i'd like a smaller gear. but not all the way to 3.91. i like to drive it everyday and the gas would kill with a gear that small. i'm thinking 3.73 would be closer to ideal.
    always trying to make it lighter and faster

    ^^former build: http://www.bimmerforums.com/forum/sh...-neglected-M3/
    current build: http://forums.pelicanparts.com/porsc...car-build.html
    instant grams: doktor_b

  7. #57
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    Rear end should match the trans. I thought the T5s were similar ratio sets to the T56 but I don't know my domestics.

    Status: Someone put glitter in my oil. Wait. Why's all my oil outside the engine? What's that knocking?

  8. #58
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    I think he was asking about the ratio in buddy's skyline, but as for my car with the zf and stock BMW rear end, our train of thought is the same, it should drive like a more powerful m/sXX car but with all the sounds of freedom a guy could ask for.

  9. #59
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    Quote Originally Posted by Mikestokman View Post
    I think he was asking about the ratio in buddy's skyline, but as for my car with the zf and stock BMW rear end, our train of thought is the same, it should drive like a more powerful m/sXX car but with all the sounds of freedom a guy could ask for.
    That makes a lot more sense.
    also, I think my favorite part of the LSswap are all the freedom references. In particular, my friend refers to the power my car makes as BEP instead of WHP. BALD EAGLE POWER. Cracks me up every time.
    always trying to make it lighter and faster

    ^^former build: http://www.bimmerforums.com/forum/sh...-neglected-M3/
    current build: http://forums.pelicanparts.com/porsc...car-build.html
    instant grams: doktor_b

  10. #60
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    I guess that (BEP and sounds of freedom) makes my mind up on the whole issue.

    /thread


  11. #61
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    I just wanna do burnouts and scream 'Murcia. That's like 95% of the reason I'm doing this thing.

  12. #62
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    I wanted 350-400 at the wheels without the weight or heat of a turbo.
    #BEPforlyfe
    always trying to make it lighter and faster

    ^^former build: http://www.bimmerforums.com/forum/sh...-neglected-M3/
    current build: http://forums.pelicanparts.com/porsc...car-build.html
    instant grams: doktor_b

  13. #63
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    My 5.3 is stock for now, can't ball out like you guys just yet..

  14. #64
    Jkpgt96's Avatar
    Jkpgt96 is offline One of those JZ swappers BMW CCA Member
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    Here are my thoughts on my 2jz swapped e36..

    Pros:
    Incredibly strong in factory form
    Cheap to make big power once the swap is done
    Endless platform support
    Plethora of used parts available
    Fits very nicely into chassis
    Relatively simple swap
    Can be done at a comparable price point to the other options
    The sound..esp of a 1jz..
    Cool factor

    Cons:
    Heavy drivetrain
    Trans cost (though options exist that are no more expensive that a 420g swap and much cheaper than a t56..
    Cooling needs

    Personally I love my 2j. The looks I get at shows, the sound, the power..it is just a fantastic engine. I have had no issues with mine.

    A turbo BMW I6 would be my next choice..I love the straight 6 sound and turbo. The LS is a bit vanilla for me..but I am sure the same can be said for a Jz swap these days..

    I am more than happy to answer anything you wonder about this swap, or check my build thread on here.


    Sent from my iPhone using Tapatalk
    1995 M3 - Forged 9.8:1 2JZ, S366, MS3x, E85, LQ9s, 420g/PMC Motorsport kit, 4 clutch 3.15 LSD Large Case 757whp/710wtq
    2011 X5 Xdrive35d- Blk on Cinnamon, Towing Pkg, Heat Pkg., etc..the tow rig/DD!

  15. #65
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    Quote Originally Posted by Mikestokman View Post
    I just wanna do burnouts and scream 'Murcia.
    I <3 you.

    But then again, that's what I do with my 150 horse slushboxer kraut car.. Is that wrong?

  16. #66
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    Updated the OP with some more usernames thanks to doktor b and also some places to begin looking at parts for the various swaps

  17. #67
    modernbeat's Avatar
    modernbeat is offline Senior Member Supporting Vendor
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    What? No love for the Coyote swap? ;-)



    For oil control in the LS, the minimum we do is a better baffle and run it one quart overfilled. After that we add an Accusump. Then we go straight to dry sump. The 650whp NA LS in our E46 was designed for dry sump. And it makes more power because the engine designer was able to change some things knowing that it would be dry sumped.
    Jason McDaniel at Vorshlag

  18. #68
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    The day a Coyote swap becomes as financially feasible as a JZ or LS swap, I'll consider it.

    Status: Someone put glitter in my oil. Wait. Why's all my oil outside the engine? What's that knocking?

  19. #69
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    I, for one, would kill for a coyote powered BMW. (Not just because I work for Ford) The main constraint for me is that I would want it in an e36, and the packaging/ cost is far beyond my means

  20. #70
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    HOLY SHIT that's awesome!

  21. #71
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    It just reminds me of my M62, for which I have little love. Lol

    (because of the packaging problems with DOHC V-8s)
    Last edited by tptrsn; 03-22-2017 at 02:50 PM.

  22. #72
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    There was a coyote e36 for sale on the east coast a few months ago.
    the packaging constraints made it look like you'd have to drop the motor to do plugs or a valve cover gasket.
    for those reasons, I'm out. (Been watching a lot of Shark Tank recently)
    always trying to make it lighter and faster

    ^^former build: http://www.bimmerforums.com/forum/sh...-neglected-M3/
    current build: http://forums.pelicanparts.com/porsc...car-build.html
    instant grams: doktor_b

  23. #73
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    I was kind of thinking that plugs would be the good part about a coyote swap, and pretty much everything else would be misery like the M62. Albeit that you can at least buy cams for the coyote, but damn they're expensive. Overall to me it seems that the LS rules over the coyote on all fronts other than sound maybe. Some of those coyotes sound soooo sweet. Must be they carried the firing order over from the old 5.0s or something.

    Man this has turned out to be a damn good thread!

  24. #74
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    If money and maintainability wasn't an issue, the dohc V8 coyote engine would rule. The single cam in the LS really doesn't do it any favors aside from simplicity. Push rods? Trunnions? Removing your radiator to do a cam job? BAH!

    Status: Someone put glitter in my oil. Wait. Why's all my oil outside the engine? What's that knocking?

  25. #75
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    Quote Originally Posted by protomor View Post
    If money and maintainability wasn't an issue, the dohc V8 coyote engine would rule. The single cam in the LS really doesn't do it any favors aside from simplicity. Push rods? Trunnions? Removing your radiator to do a cam job? BAH!
    COMP Trunion upgrade and rear mount, 2/3 problems solved! haha

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