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Thread: 18R turbo

  1. #1
    Forum Member 1st year Apprentice
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    Default 18R turbo

    Can i build turbo On a stock 18R or do i have to lower the compression or/and Change to stronger Head gasket? And can i use stock carburator without electronic fuelpump?

  2. #2
    Toymods Net Nazi Too Much Toyota river's Avatar
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    Default Re: 18R turbo

    Hi,

    I assume you are talking about the 18R-C, as opposed to the 18R-G?

    If so, the stock CR of the 18R-C is fine. Matter of fact I think the stock CR of the 18R-GU and 18R-GUE are in the 8-point-something also. But if it's an 18R-G or 18R-GR then I'd drop the CR down a bit for turboing.

    seeyuzz
    river
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    RA25GT - There is no substitute | 18R-G - Toyota's Dependable Masterpiece
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  3. #3
    Junior Member Domestic Engineer
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    Default Re: 18R turbo

    Hi-Comp with less boost FTMFW
    Once apon-a-time world famous Photochopper

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  4. #4
    Junior Member Backyard Mechanic
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    Default Re: 18R turbo

    ..........
    Last edited by jabbatron; 27-08-2015 at 01:42 AM.

  5. #5
    Junior Member Domestic Engineer
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    Default Re: 18R turbo

    any have any thoughts on how a single CT12a would help or hinder an 18r blow through carby turbo setup


    i got given a set of std JZ twins one seized the other has minimal shaft play. i was thinking dodgy one up on the 18r and rebuild the other for a spare

    dont really want put them both on but im thinking one is prob a bit small ay?
    Once apon-a-time world famous Photochopper

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  6. #6
    king & queen of cheese Domestic Engineer lilcrash's Avatar
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    Default Re: 18R turbo

    A few years ago I was playing with a draw through turbo setup on a 4k, was an su carb mounted to the front of a ct12 sized turbo feeding staight into the inlet ports, made the old 4k move pretty well. Just remember to get metal seals put in the turbo, the rubber ones don't like the fuel too much.

    Just an option if you have problems with your stock carby.
    Looking for a new toy. If you have something 18r powered let me know.

    RIP, where ever you are :- 1974 celica, 3tgte and 186.5hp at 6500rpm

  7. #7
    Junior Member Backyard Mechanic
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    Default Re: 18R turbo

    ..........
    Last edited by jabbatron; 27-08-2015 at 01:42 AM.

  8. #8
    Forum Member 1st year Apprentice
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    Default Re: 18R turbo

    I have a hilux with an 18r running a draw through t04 turbo and a Stromberg cd175 at 9 psi. I fitted an electric fuel pump which runs all the time along side the mechanical one the carby has two fuel inlets
    only issues I have had are the initial tune (I had to make my own needle using a drill and sandpaper)
    And after six months of flogging it did a big end.

  9. #9
    Junior Member Too Much Toyota
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    Default Re: 18R turbo

    Been there and got the T-shirt, both draw thru carbi and then efi. T03/4 hybrid for the carbi and then ex-rb30 Turbo with custom fabbed intake. Even with a Turbo friendly cam, the motor ran out of puff/flow too early compared to 18rg head. EFI made it far more drivable but over 5k it tappered off. Far better to start with a efi-capable engine
    Last edited by thechuckster; 31-03-2013 at 05:18 PM. Reason: improved grammar a bit
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