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Old 06-25-2014, 08:47 AM   #556
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Check this shop:

http://www.rc-race-and-drift-japan.c...th=113_158_154
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Yokomo YR-X12
Shepherd Velox EC
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Old 07-10-2014, 07:38 AM   #557
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R12 C3.1 up on Yokomo web today


http://www.teamyokomo.com/news/order..._yr_r12c31.pdf
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Old 07-10-2014, 05:17 PM   #558
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The Japan Nationals were held last weekend in Kyushu Prefecture. Over 168 drivers were in attendance for both modified and stock racing. During the race event I had the opportunity to check out top drivers Yokomo setups. I focused my attention mainly on stock racing chassis', and was quite surprised to see modifications made to make the C3's run fast.

First off the front suspension was removed for a more simpler setup. Most drivers opted for the Team Associated or Xenon or Team Bomber front end.

The center damper was switched out for either a Team Prime or Sqaure RC center damper. This change offered a more smoother and consistent handling car, whereas the Yokomo damper was too reactive which isn't ideal for carrying speed though the corners for stock racing. I've purchased the Team Prime s center damper and it's well worth the money.

Dampening tubes were used on all Yokomo chassis'. Recently Yokomo has released an updated chassis with their own side damper tubes. You can purchase this as a kit if you already have the C3 chassis. The reasoning behind going to side dampener tubes is 1. Easy of maintenance, reliability, and consistency. The original side damper wasn't consistent from left to right and was a hassle to perfect. There's a company called Team Bomber which offers a side tube dampening system.

Rear bulkheads. Many racers using the C3 or earlier R12 variants where using Team Bomber rear bulkheads. These bulkheads offer several things 1. Much stronger than the stock bulkhead 2. The opening for axle height adjusters to be inserted in is the correct size, this in turn will not cause pinching of the bearings. 3. You can move the axle back by 3 mm which will lengthen the chassis.

Heavy duty capacitors were used on most of the chassis. Like 250,000uf huge! This helps to keep the motor and electronics working at their fullest potential without any performance drop off during the course of a 8 min race.

Last edited by EDWARD2003; 07-10-2014 at 06:03 PM.
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Old 07-10-2014, 06:00 PM   #559
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The Japan Nationals were held last weekend in Kyushu Prefecture. ....
You run 1s or 2s Ed ?
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Old 07-10-2014, 06:03 PM   #560
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You run 1s or 2s Ed ?
2 cell lipo.
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Old 07-10-2014, 06:12 PM   #561
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2 cell lipo.
I gather then, the lap times were similar to the 1s mod class, or did they also run 2s ?
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Old 07-10-2014, 06:52 PM   #562
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Modified 1s fastest lap was 11.514 by Naoto Matsukura. Avg 12.200
Stock 2s fastest lap was a 12.772 by Naoki Kuroda. Avg 13.200

The modified drivers were driving in a counterclockwise direction whereas the stock drivers were driving clockwise. So, I don't know if this is a good way to compare laps between the two race classes.

Last edited by EDWARD2003; 07-10-2014 at 07:08 PM.
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Old 07-13-2014, 09:05 PM   #563
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Quote:
Originally Posted by EDWARD2003 View Post
The center damper was switched out for either a Team Prime or Sqaure RC center damper. This change offered a more smoother and consistent handling car, whereas the Yokomo damper was too reactive which isn't ideal for carrying speed though the corners for stock racing. I've purchased the Team Prime s center damper and it's well worth the money.

Could you please share some Links and/or photos?
I can't find anything about these dampers...

Regards, Gero
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Old 07-14-2014, 12:46 AM   #564
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http://www.reflexracing.net/Team-Pri...et_p_2232.html

Team Prime Shock

http://www.rc-square.com/product/hanyou/han_race.htm

Sqaure RC
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Old 07-14-2014, 05:00 AM   #565
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Team Prime installed

I cannot correct the orientation.
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Old 07-14-2014, 05:05 AM   #566
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Team Bomber Castor Blocks with optional upper arm positions.
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Old 07-14-2014, 06:05 AM   #567
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Team Bomber Castor Blocks with optional upper arm positions.
Looks like the Xenon front end
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Old 07-14-2014, 06:57 AM   #568
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Yes, it's the Xenon front end. I'm testing out different front ends to see which one I prefer. I do like the simplicity of the Xenon front end.
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Old 07-15-2014, 02:15 AM   #569
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The Yokomo C3 and probably early models have some really tight machining tolerances. This is quite noticeable with the rear axle cutouts for the bearing holders. I knew something wasn't right because it took quite a bit of effort to place and remove the bearing inserts. Not only that, I found the axle wouldn't spin freely after blasting the stock grease and lightly rear oiling the bearings. I just figured I was being to finicky about the rear axle and just accepted it the way it is.

During the japan Nationals, Naoto destroyed the rear bulkhead of his car, and I mean destroyed it. So, the Yokomo mechanic was given the wonderful task of build a new rear pod assembly. I decided to walk over and see what the mechanic was doing. There he was with a rotary tool grinding away feverishly at the aluminum motor mount where the inserts are placed in.

I did this modification to my car and all I can say is what a difference it has made to the drive train. A modification well worth doing.
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Old 07-15-2014, 02:17 AM   #570
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The funny thing is I didn't have a rotary tool available. I took my brushless motor and put on a 24 tooth harden steel pinion and started grinding away..
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