1982 P type 1JZ GE action - Page 2

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  1. #11
    CelicaSupra.com Member mutantcolors's Avatar
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    Actually, I already learned the 1J and 2J flange patterns differ, but maybe there's some super secret design the internet doesn't know about yet.

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  3. #12
    CelicaSupra.com Member mutantcolors's Avatar
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    Quote Originally Posted by SupraFiend View Post
    Weird, these things are basically identical to the is300 2jzge.

    The really rare one is the direct injection 1jzge...
    I actually hunted for one of those, supposed to be at least 10% better on fuel, but they are hen's teeth incarnate.

  4. #13
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    If it's anything like the turbo 1jz vvti, then the exhaust port for cyl 1 and 2 are really close together, and the same for 5 and 6. This is very different from a 2jz manifold. Mind taking a picture of the top of the exhaust manifold?

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  6. #14
    CelicaSupra.com Member BillyM's Avatar
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    Cool motor - bet she's going to be a screamer!!!

    --billyM
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  7. #15
    CelicaSupra.com Member mutantcolors's Avatar
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    I will photograph it when I'm back over there, we're doing it at my friend's house where the hoist and welder and $10k in other tools reside. This motor is really unpopular LOL, so aftermarket manifolds that aren't turbo are just not a thing people seem to build, when multiple turbo configurations were available from the factory.

    We found quite a few videos from Russia and NZ of folks roasting tires with one of these, so my hopes are up.

    SIGN ME UP.

  8. #16
    CelicaSupra.com Member mutantcolors's Avatar
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    So, I had a pleasant surprise when I removed the heat shield...
    Explains why you don't really find headers aftermarket.


    Also, these are just cool.





    ...and now that I look at it, $50 says the 2J headers bolt right on. Notice the even spacing of ports.
    http://www.jayracing.com/index.php?m...SABEgLwpPD_BwE

  9. #17
    CelicaSupra.com Member williamb82's Avatar
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    Get a 2jzge exhaust manifold gasket and see how it lines up. If it fits, your good to go. I run a supra 2jzge header on my gs300. Tight fit, but should clear easier on the mk2 since it has more room on the sides of the engine bay.
    william
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  10. #18
    CelicaSupra.com Member SupraFiend's Avatar
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    Maybe. That is a dramatically different exh manifold design compared to what any 2jzge comes with. Definitely all of the 1jzgte stuff uses a different pattern then the 2jzs.

    But worst case, that actually isn't that bad of a header design. The runners are a little short and the collector is a little bunched up, but the primaries are already tubular mandrel bent and look fairly equal length. You probably won't do too bad just making a custom downpipe right off that flange. Also with a displacement limited motor like this, going too big on the piping may kill your bottom end and mid-range.
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  11. #19
    CelicaSupra.com Member mutantcolors's Avatar
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    For now I'm just happy to see stock headers, and we'll downpipe right from there. The previous owner actually put some decent exhaust on the car, so it's mostly getting reused.

  12. #20
    CelicaSupra.com Member
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    I was going to say, those are pretty cool headers! I would keep them!

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