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Old 05-11-2003, 09:01 AM   #1
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Default Yoko MR4-TC belts

I'm running an MR4-TCR with a 19D motor, GM V12 etc

will the silent front and rear belts work with this setup?

how long will they last?
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Old 05-11-2003, 11:53 AM   #2
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They should work with any belt drive MR4 car.
As for length of service, it really depends on where you are racing,
indoors on carpet is probably more stressful to them on account
of the level of grip generated, but outdoors more chance of
damage due to stones getting in the gears and damaging the belts and gears.
Hope this helps
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Old 05-11-2003, 01:01 PM   #3
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thanks for that.

i tend to run on asphalt/parking lot style surfaces - so i think the silents should be OK.

i seem to remember that most people would run the silent rear and low friction front? am i right in thinking this?
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Old 05-12-2003, 05:12 AM   #4
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With a 19t motor you can run both silent belts(Fr and Rr) and they should last fine.

The belt mixing option was aimed more at those running very hot motors and was "silent" front, "low friction" rear as the LF rear belt was able to withstand the abuse longer.

If you're running LF belts now, you may notice the difference with the Silent ones especially when "Bench racing" as the newer belts free up the drivetrain.

DO NOT WD40 the "Silent" belts....
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Old 05-12-2003, 05:31 AM   #5
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All guys I've talked to, which have tried better belts, reports on more speed and acceleration.
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Old 05-12-2003, 05:53 AM   #6
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Quote:
Originally posted by Cole Trickle
All guys I've talked to, which have tried better belts, reports on more speed and acceleration.
i've tried all combination of belts since the oringal MR4 came out and there is no way you can notice a speed difference unless you've got eyes like a gatso (speed camera).

the only noticable difference is the noise,

sanj
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Old 05-12-2003, 10:04 AM   #7
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thanks for those bits of advice

i'll put the belts in before i go racing next.
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Old 05-13-2003, 02:35 AM   #8
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Quote:
Originally posted by schumacher
i've tried all combination of belts since the oringal MR4 came out and there is no way you can notice a speed difference unless you've got eyes like a gatso (speed camera).

the only noticable difference is the noise,

sanj
Well, there are other cars than Yokomo cars

Anyway, in your article about belt versus shaft, you mention that "In a belt driven car there is only one factor that causes inefficiency. That factor being the belts! " So it surprices me a lot, when you say that changing the belts on Yoke's dont change anything else than noise.
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Old 05-13-2003, 02:57 AM   #9
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well you answered your own question there, its still a belt. granted if you put low friction or narrower belts on the car will accelerate marginally faster. whether its enough for you to notice is another matter.

sanj
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Old 05-13-2003, 03:00 AM   #10
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The silent belts make the transmission slightly smoother than the previous "Low friction" belts, you'll notice this on the bench rather than out on the track.

In saying that, the car will be slightly more efficient but whether or not you can actually feel it, thats neither here nor there.
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