Yokomo MR-4TC SD

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Old 05-09-2003, 12:45 PM
  #1186  
mo
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I use chassis film on the front and rear 2-3" of the chassis. That is all that usually hits and you don't have to do all that trimming.
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Old 05-09-2003, 12:47 PM
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i think u should, i noticed that the vibration of my esc against the SSG created some traces, just imagine the result if i didnt protect the chassis, actually i added a lexan plate under the chassis, it is wider so it also protect the edges of the bottom plate (it makes ut car heavier too but i think it worths enough for 3 more grams)
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Old 05-09-2003, 12:49 PM
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Default MOTOR HEATSINK

Tamiya EVO motor heatsink is a perfect match for the car..

see the other photos as well...

Front and rear MIP CVDs fit perfect!
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Old 05-09-2003, 12:54 PM
  #1189  
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Good idea Mo! Thanks.
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Old 05-09-2003, 01:04 PM
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rc-zombie, what is the reference of the CVDs
on which kind of surface are you running (just watching ur spring set up)
thanks

Gilles
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Old 05-09-2003, 01:08 PM
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Originally posted by utieh
rc-zombie, what is the reference of the CVDs
on which kind of surface are you running (just watching ur spring set up)
thanks

Gilles
Using Mo's setup for asphalt.
I got the CVD's off ebay for cheap... so I just put them on..Plus they are more durable than the Yokomo bones.
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Old 05-09-2003, 01:14 PM
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thanks
the hobby shop where i ordered the spring didn't have the green one in stocks so i just have orange+yellow. are the silver stiffer than the yellow?
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Old 05-09-2003, 01:18 PM
  #1193  
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Yes, the silver is a litte stiffer than Yellow.
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Old 05-09-2003, 01:57 PM
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thanks, so i will use silver in the front during I wait for the green .
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Old 05-09-2003, 02:13 PM
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Default Spring Rates:

Part Number Colour Spring Rate lbs/inch
YS-1360 Black 9.67
YS-1355 Blue 10.45
YS-1465 White 11.01
YS-1460 Hot Yellow 12.85
YS-14525 Stainless 12.89
YS-14575 Hot Pink 13.09
YS-1455 Hot Green 13.75
YS-1560 Dark Green 16.21
YS-1450 Hot Orange 17.68

Usualbe TC3 springs:
Associated TC3 Green 12.00
Associated TC3 Silver 14.50 Same as Rayspeed Silver
Associated TC3 Blue 17.00 Same as Rayspeed Blue
Associated TC3 Gold 19.50


Anti Roll Bar chart:
Colour Torsion Rate (N/rad) Equivalent rate at wishbone(lbs/inch)
Black 24.57 9.1
Silver 30.57 11.4
Brass 38.34 14.2
Copper 40.77 15.1
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Old 05-09-2003, 02:23 PM
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speedtechrc- the yokomo Ti screw set retails for $37 and my local hobby shop that we can't say anymore has them in stock. Yes they are very low on the price of the screw set but for some reason 2 Ti ball studs will set you back $17!
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Old 05-09-2003, 02:54 PM
  #1197  
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Default Re: Spring Rates:

Originally posted by rc-zombies
Part Number Colour Spring Rate lbs/inch
YS-1360 Black 9.67
YS-1355 Blue 10.45
YS-1465 White 11.01
YS-1460 Hot Yellow 12.85
YS-14525 Stainless 12.89
YS-14575 Hot Pink 13.09
YS-1455 Hot Green 13.75
YS-1560 Dark Green 16.21
YS-1450 Hot Orange 17.68
Where did you find those figures rcz? My understanding is slightly different...

Yokomo springs are graded thus... First two figures are spring wire diameter, latter figures are number of coils - so YS-1460 is a 1.4mm, 6 coil spring.

Thicker wire = stiffer spring
Fewer coils = stiffer spring

So the order "should" be (in the YS-14 range) White, Yellow, Pink, Green, Stainless, Orange (this is the order Yokomo rate them, except the stainless which isn't listed in the chart you get with a pair of springs). Because of variances in manufacture, you can end up with values like those above if you measure springs individually though.

I believe Yokomo rate the 1355 Blue as stiffer than the 1465 White, but softer than the others. Not sure where they rate the 1560 GT4 spring.

Usable TC3 springs:
Associated TC3 Green 12.00
Associated TC3 Silver 14.50 Same as Rayspeed Silver
Associated TC3 Blue 17.00 Same as Rayspeed Blue
Associated TC3 Gold 19.50
For those that didn't know, the TC3 springs are a narrower diameter (will they rub the threaded bodies?), and use differently dimensioned shock bottoms.


Anti Roll Bar chart:
Colour Torsion Rate (N/rad) Equivalent rate at wishbone(lbs/inch)
Black 24.57 9.1
Silver 30.57 11.4
Brass 38.34 14.2
Copper 40.77 15.1
Wondering where you found these figures as well? I thought there was only three grades of Yokomo anti-roll bar, black (1mm), silver (1.2mm), gold (1.4mm).
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Old 05-09-2003, 03:03 PM
  #1198  
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Sosidge..

Forgot where I down loaded those numbers from. I'm sure someone took the time who had a measure device of some kind to measure the springs. Yes it is true what you have stated:

Thicker wire = stiffer spring
Fewer coils = stiffer spring

With the right instruments it can be measured lbs/inch or even gr/mm for those metric folks

TC3 springs are only a fraction smaller in diameter. Some racer use TC3 shock parts on their TC's

As for the anti-roll bars...
The SD kit comes with 4...as shown:
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Old 05-09-2003, 03:04 PM
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I have MR-4TC-SD with a 48 pitch 70 tooth spur, what pinion shoud I use For a Trinity Monster Horse power stock motor I race on an med/large sized track any help would be greatly appreciated
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Old 05-09-2003, 03:06 PM
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Originally posted by noline
I have MR-4TC-SD with a 48 pitch 70 tooth spur, what pinion shoud I use For a Trinity Monster Horse power stock motor I race on an med/large sized track any help would be greatly appreciated
Yokomo recommended gearing a P2k at 6.4-6.8
for the Monster maybe around 7.2 final drive ratio to start.
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