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Thread: rx8 gearbox?

  1. #961
    Pole Position Decade Plus User M11rf's Avatar

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    Re: rx8 gearbox?

    So, anyone using an RX7 box?

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    Re: rx8 gearbox?

    Quote Originally Posted by therealpinto View Post
    Do you know what kind of torque you have?

    I'm a bit curious on trying an RX8 gearbox to replace my T5. But I have 280 whp and over 400 Nm from the Pinto turbo and gut feeling says the RX8 gearbox would be marginal.

    Gustaf
    what about using the rx7 box? they have the same bellhousing pattern.

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    Re: rx8 gearbox?

    Quote Originally Posted by freddy686868 View Post
    what about using the rx7 box? they have the same bellhousing pattern.
    OK, but are they as "easy" to find? Haven't checked but in Sweden Rx7s are thin on the ground.

    Gustaf

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    Re: rx8 gearbox?

    Quote Originally Posted by therealpinto View Post
    OK, but are they as "easy" to find? Haven't checked but in Sweden Rx7s are thin on the ground.

    Gustaf
    That i wouldn’d know sorry. All i know is they will bolt on the same as the rx8. Rx7 parts are pretty rare anywhere really.

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    Tyre Kicker rsdeano's Avatar

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    Re: rx8 gearbox?

    So I've read through the thread and it seems that the rx8 box is pretty strong, but not as strong as a t5 or an rx7 box.
    Does anyone have experience with matching it to the Duratec 2.0ltr?
    I had someone tell me today that the RX8 box isn't known for its nice shifting.
    How have others experienced thiers?
    Thanks

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    rx8 gearbox?

    Rx8 Shifts better than a t5 and even better with a quick shift


    Sent from my iPhone using Tapatalk

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    Tyre Kicker rsdeano's Avatar

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    Re: rx8 gearbox?

    Sounds good Ian...

    how do they go fitting in to the tunnels in mk1ís?

    are they heavy compared to a type 9?

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    rx8 gearbox?

    Fitted mine in a mk2 with just bellhousing tunnel mods :-)
    They are heavy 5kg more than a t5 so 42kg
    I paid more for the quick shifter than the gearbox and carbon prop but seems to b holding up well
    Cable clutch on mine is fine too if little bit heavy :-)



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    Re: rx8 gearbox?

    Quote Originally Posted by rsdeano View Post
    So I've read through the thread and it seems that the rx8 box is pretty strong, but not as strong as a t5 or an rx7 box.
    Does anyone have experience with matching it to the Duratec 2.0ltr?
    I had someone tell me today that the RX8 box isn't known for its nice shifting.
    How have others experienced thiers?
    Thanks
    They shift stunning even standard. Not as stong as the t5 that is for sure but they take revs much better. They are a great box for the price. I still haven’t mated one to a duratec i am struggling to get hold of a bottom end with a crank/starter and flywheel to sort out an adaptor plate.

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    rx8 gearbox?

    Awesome
    That sounds good Freddy

    There are a lot of points heading me towards deciding on the rx8 box

    Iím still stuck on deciding my path for my 71 mk1 1300xl 3 speed auto shell

    Three main options
    Cozzie
    Duratec
    Zetec

    Cozzie standard (semi) with t5
    Duratec standard (semi) with a lot of extra costs for fitting and to make it fit
    Rx8 or rx7 box
    Zetec lumpy with 180 ish bhp
    Type 9 or rx8
    All with hilux rn25 diff and large single piece tailshaft modified


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    Re: rx8 gearbox?

    A type 9 box that will hold 180hp and have a decent 1st gear will be ove £1k.

    Rx8 box (6 speed) is an Aisin az6 which is also in
    Rx8 - 230hp, 9k rpm, not much torque
    IS200 - 200hp more torque
    S15 200sx - 250hp turbo, lots or torque
    Gt86/brz - 170hp
    Mx5 mk3 - 170hp (and a Duratec engine but iirc box/engine are at a slight angle to each other)

    The reason for using the rx8 box is that it has the same input spline as Ford so can use stock clutches on the Zetec etc.

    So, I think the general consensus is that it is probably good for 250hp, 250ftlb, and 9k rpm. This will be more than most Zetec or Duratec can put out. Ratios form 2-6 are the same as the straight cut Quaife type 9 clubman but the rx8 is helical (quieter) handles marginally more power and is 1/10 the price.
    1968 Ford Anglia 1.7 Puma engine/Escort front/5 Link rear/RX8 box
    http://www.Anglia1968.weebly.com

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