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Thread: Rack Tech

  1. #11
    Veteran Jonny Rochester's Avatar
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    Great info. I previously didn't have this measurement of the GTV rack. Here is what I have to add, for manual racks:

    From EPC:
    -AE86, KE70, AE71, GTV housings are all the same
    -AE86, KE70, AE71, GTV pinions are all the same
    -AE86, KE70, AE71 (exc GTV) racks are all the same
    -GTV rack is unique
    -AE86, KE70, AE71, GTV rack ends are all the same
    -GTV tierod ends are a different part,

    From sundee86 info above, the GTV and normal AE86 have the same or similar gear ratios. And considering they both use the same pinion, I will say they have the same ratio. (About 0.023 turns per mm, or 43mm per turn)

    Conclusion:
    thinking...

    Extra lock fitment:
    The thread in the end (or your spacer, or rack end) maynot be perfectly centred. So whoever provides your extra lock device (slip-on spacer/ threaded spacer/ rack ends) should make the diameter slightly undersize with a chamfer to avoid it catching on the passanger side bush.
    Last edited by Jonny Rochester; 1st March 2009 at 11:52 PM.

  2. #12
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    and just to confirm with what jonnyrochester said above, i had to cut 6mm of my tie rods (Standard AE86) because they ran out of thread.

    As for the lock spacer, mine catches, im about to pull it all appart again, measure the ID of the rack bush and put the spacer on a lathe and mill it down so its a perfect fit. and im going to put the verniers on the spacer to see if the thread is centered. ill get back tomorrow with the results

  3. #13
    Veteran Kid Karola's Avatar
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    got a pic somewhere comparing to std rack and Quaife Quick Rack...

    Top: Quaife Rack - Straight cut teeth 25T, different angle and larger pinion 10T. Quaife is 2.5 lock-lock.
    Bottom: Manual Rack - also 25T, but Pinion 7T = 3.6 turns lock-lock.


    Left: Quaife Pinion
    Right: Manual Pinion


    Note: Quaife Rack does NOT give more lock! but is has more direct and quicker steering response, although heavier.
    Some people have had extra teeth cut into the Quaife rack to increase lock.

    Also GTV use power-steering arms also.
    Last edited by Kid Karola; 26th February 2009 at 11:41 PM.
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  4. #14
    Veteran anastasios's Avatar
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    so the ke70 and 86 rack are the same?

  5. #15
    Veteran Jonny Rochester's Avatar
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    Yes, according to the EPC. At least in Japan they are. But I think the local KE70 racks may have been built localy. I am told the KE70 rack has 1 less tooth, and I now know they have less stroke. (Hence the greater need for a lock spacer on a KE70).
    Last edited by Jonny Rochester; 2nd March 2009 at 09:32 PM.

  6. #16
    Veteran anastasios's Avatar
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    and what does one less tooth do?

  7. #17
    Senior Member RacerMelb's Avatar
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    Can any one tell me what length the Jap Power steer racks are, due to the wife wanting to use the car as well she has requested Power Steering, so interested to find out what dimentions they are.

  8. #18
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    i believe the adm ke70 and ae86 have the same teeth.. but the 86 rack has more throw.(longer.)

  9. #19
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    hmm i can already see the shopping trolly dings appearing in the body work!!

  10. #20

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    which rack needed 6mm cut of the tie rod when installing AJPS lock spacer?
    reason is, i installed one on an aw11 rack and i didn't have to cut 6mm off. so i would assume the AW11 has the exact same rack as one of the AE86's?

    also i think stock turn was 3.2 lock to lock. right now its 3.5? will check when i get the car back from panel beaters
    Last edited by kAmbo; 23rd February 2009 at 07:42 PM.

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