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Old 04-17-2004, 10:53 PM   #1
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Default MTX3 Negative Diff

Can anybody explain how the Kawahara Negative Diff works? How does it effect handling? Is it intended for certain track sizes? I'm assuming it must do something if it costs $100.

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Old 04-17-2004, 10:57 PM   #2
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pretty much, it is a diff when off- power and becomes a solid rear axel when on power.

There is a clutch inside the diff which engages on power to enable it to become a solid axel.
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Old 04-18-2004, 01:10 AM   #3
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Works on all track sizes. The locking action can be smoothed out with a little oil or wd40 on the clutch shoes. You will need to carve a little out of the body mount bracket to clear. Also looks way cool.
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Old 04-18-2004, 01:13 AM   #4
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Quote:
Originally posted by rjl
Works on all track sizes. The locking action can be smoothed out with a little oil or wd40 on the clutch shoes. You will need to carve a little out of the body mount bracket to clear. Also looks way cool.
yah, or you can get the kawahara optional rear shock tower
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Old 04-18-2004, 08:24 AM   #5
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Quote:
Originally posted by B
pretty much, it is a diff when off- power and becomes a solid rear axel when on power.

There is a clutch inside the diff which engages on power to enable it to become a solid axel.
I've never tried a solid rear axle so I'm a little confused on the handling characterisitcs. Will it will have the traction of a standard diff entering the turn and reduce on-power steering mid to corner exit when the rear diff locks under power? Thanks for the help.
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Old 04-18-2004, 04:28 PM   #6
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when i tried the negative diff it performed exactly as you stated normal traction on entry and less steering on exit to mid corner
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Old 04-18-2004, 04:45 PM   #7
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Quote:
Originally posted by Mike D
I've never tried a solid rear axle so I'm a little confused on the handling characterisitcs. Will it will have the traction of a standard diff entering the turn and reduce on-power steering mid to corner exit when the rear diff locks under power? Thanks for the help.
Actually it is the opposite. The theory is this:

With a standard diff you fill it with "non adjustable" diff oil. Hence you must compromise between off power turn in and on power steering. Stiffer diff oil gives less off power turn in and more on power steering.

The Negative diff can be filled with a very light diff oil and thus have very good off power turn in. But then when you get on the gas and the diff locks up (BTW it NEVER locks up like a solid diff the clutch shoes dont grab that hard) and the on power steering is also improved.

Does it work? Well yes. I was a little doubtful myself but it really is a very good device.
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Old 04-18-2004, 06:17 PM   #8
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Quote:
Originally posted by AMGRacer
Actually it is the opposite. The theory is this:

With a standard diff you fill it with "non adjustable" diff oil. Hence you must compromise between off power turn in and on power steering. Stiffer diff oil gives less off power turn in and more on power steering.

The Negative diff can be filled with a very light diff oil and thus have very good off power turn in. But then when you get on the gas and the diff locks up (BTW it NEVER locks up like a solid diff the clutch shoes dont grab that hard) and the on power steering is also improved.

Does it work? Well yes. I was a little doubtful myself but it really is a very good device.
Great answer! Thanks.
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Old 04-18-2004, 08:24 PM   #9
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Where can someone buy one in the states?? Thanks
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Old 04-18-2004, 10:42 PM   #10
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Default Re: MTX3 Negative Diff

Quote:
Originally posted by Mike D
Can anybody explain how the Kawahara Negative Diff works? How does it effect handling? Is it intended for certain track sizes? I'm assuming it must do something if it costs $100.

$154 to be exact. My friend just bbought one yesterday Not cheap
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Old 04-18-2004, 11:26 PM   #11
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Originally posted by manokgt4
$154 to be exact. My friend just bbought one yesterday Not cheap
Too expensive. Buy from Japan or HK, MUCH cheaper
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Old 04-19-2004, 03:56 AM   #12
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One thing to remember, since there is no tension spring or such to adjust excatly when to engage, your car will perform differently on each engine power/tuning condition.

Dont get it wrong becuase this device is working, that`s why you would then end up having other problem.
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Old 04-19-2004, 04:56 AM   #13
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Quote:
Originally posted by Pyramid
One thing to remember, since there is no tension spring or such to adjust excatly when to engage, your car will perform differently on each engine power/tuning condition.

Dont get it wrong becuase this device is working, that`s why you would then end up having other problem.
In THEORY you are right. In practice you are wrong.
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Old 04-19-2004, 08:43 AM   #14
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Post Negative diffrential

Now as far as engaging & disengaging would you guys say that it's pretty consistant? Now I guess would this item be worthed or would it be another pretty looking hop-up on the car (Expensive) Please any input would really help thanks in advance for your help.
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Old 04-19-2004, 12:11 PM   #15
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Quote:
Originally posted by Pyramid
One thing to remember, since there is no tension spring or such to adjust excatly when to engage, your car will perform differently on each engine power/tuning condition.

Dont get it wrong becuase this device is working, that`s why you would then end up having other problem.
hi P,.. do they have any neg. diff for FW05 yet?!
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