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Old 09-17-2003, 01:44 PM   #3916
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what are you guys using for pinion/spur gear combinations? I run stock at Speedworld in CA (short track, tight turns, small straight) and am using a 33 tooth pinion and 90 tooth spur gear. I feel like I don't have enough torque using this combination.

Also, what combo's are you using for mod class? any info is appreciated
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Old 09-17-2003, 01:47 PM   #3917
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For brushless (which I gear like stock) I run a 37/94 with a 2.66 internal ratio.
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Old 09-17-2003, 01:51 PM   #3918
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do you know what the transmission ratio is for the Surikarn?
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Old 09-17-2003, 01:52 PM   #3919
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Quote:
Originally posted by Randman
For the front 1 way gear, the TC3 gear for the Yokomo HD one way is the right fit.
Have you a part number good sir?

Thanks.
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Old 09-17-2003, 01:56 PM   #3920
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Quote:
Originally posted by hierog
do you know what the transmission ratio is for the Surikarn?
2.6
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Old 09-17-2003, 01:57 PM   #3921
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Quote:
Originally posted by ARC MotorSports
Have you a part number good sir?

Thanks.
I'll dig in my trash can and see if I still have the packaging for them, but as of now, no part nombre.
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Old 09-17-2003, 07:55 PM   #3922
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Hi Guys,

We got more EVOIII hop-ups and spare parts in stock from Tamiya. The website is updated! For those of you attending the TCS National, good luck and I'll see you all there

The associated one-way gear part number I believe is 3939

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Old 09-17-2003, 11:56 PM   #3923
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Quote:
Originally posted by SpeedTech
Hi Guys,

We got more EVOIII hop-ups and spare parts in stock from Tamiya. The website is updated! For those of you attending the TCS National, good luck and I'll see you all there

The associated one-way gear part number I believe is 3939

Steve Wang
Cool Steve, I'll check out what you got in right now. Can you get Square parts?
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Old 09-18-2003, 07:55 AM   #3924
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Randy, I also would like to know what the part number is for the Yokomo oneway because I had to dremel my white TC3 oneway gear to make it fit.

Oh, here-s a little tip for you- on the read diff TC3 gear, don't use the smaller balls and cut the diff, just drill the holes out to 3mm and use the stock balls.

On the rear diff I had no binding, but on the front oneway the pointed teeth on the TC3 gear hit the rounded profile of the Tamiya pimion gear. I didn't have shims to try shimming it at the time. How much did you shim yours Randy? Did your TC3 gear have the sharp pointed teeth? Is it the white one?
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Old 09-18-2003, 08:23 AM   #3925
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Quote:
Originally posted by BigDogRacing
Randy, I also would like to know what the part number is for the Yokomo oneway because I had to dremel my white TC3 oneway gear to make it fit.

Oh, here-s a little tip for you- on the read diff TC3 gear, don't use the smaller balls and cut the diff, just drill the holes out to 3mm and use the stock balls.

On the rear diff I had no binding, but on the front oneway the pointed teeth on the TC3 gear hit the rounded profile of the Tamiya pimion gear. I didn't have shims to try shimming it at the time. How much did you shim yours Randy? Did your TC3 gear have the sharp pointed teeth? Is it the white one?
I reemed the one way gear and do not have the part number for the white gear you do not have towork on to fit.
Yep, drilling the holes works good but i found the assoc diff balls to last longer.
On the front pinion i didn't have to cut between the teeth to remove the back stop on the stop pinion (that is a good trick to save stock spurs though) and found by shimming the shaft from the rear prevents any issue there(?) Yes the gears are white that we both used with the pointed teeth.
the shim in the back is quite long but i don't have the measurement handy. maybe randy has that when he gets back online.

hope that helps some
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Old 09-18-2003, 09:18 AM   #3926
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Quote:
Originally posted by BigDogRacing
Randy, I also would like to know what the part number is for the Yokomo oneway because I had to dremel my white TC3 oneway gear to make it fit.

Oh, here-s a little tip for you- on the read diff TC3 gear, don't use the smaller balls and cut the diff, just drill the holes out to 3mm and use the stock balls.

On the rear diff I had no binding, but on the front oneway the pointed teeth on the TC3 gear hit the rounded profile of the Tamiya pimion gear. I didn't have shims to try shimming it at the time. How much did you shim yours Randy? Did your TC3 gear have the sharp pointed teeth? Is it the white one?
I'll get the part #'s and everything for you today.

As for drilling the rear diff out, I think that there would be a little strength problem with the diff. The stock Tamiya diff holds 10 balls, whereas the Associated diff holds 12, the ball retainers have more material on the Tamiya diff because there are less balls, but I think if the Associated diff were drilled, that under high power loads, it may crack the diff, or cause enough heat with the balls so close together that it might melt the diff.

I've still gotta get out the calipers and measure all of the shims, different from front to rear, but I should have everything posted later today.
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Old 09-18-2003, 01:07 PM   #3927
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Randy- that tip came from a Tamiya sponsored driver, so I don't think strength is a problem.
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Old 09-18-2003, 05:58 PM   #3928
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Quote:
Originally posted by BigDogRacing
Randy- that tip came from a Tamiya sponsored driver, so I don't think strength is a problem.
Never know... but the diff is smoother with the smaller balls it seemed.
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Old 09-18-2003, 06:00 PM   #3929
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Also, the diff gear has more room to wobble with the larger balls, which kinda upsets the purpouse of changing out the gears.
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Old 09-18-2003, 08:02 PM   #3930
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Just an update for you guys, I'm almost done rebuilding my Evo 3, I'm taking a bunch of pics of the rebuild, and I'll have instructions on how to do the TC3 gear install once I finish my car.
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