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Old 24-11-2015
Carlos717 Carlos717 is offline
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Default Newbie question on fdr

Hi I'm after soon advice on what is the best fdr to use in my tc. I run 13.5 brushless set up on a polished wooden floor on a tight technical track with small straights. Thanks in advance 👍🏻
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Old 24-11-2015
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reg reg is offline
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Best bet is to ask at the track what the fast lads run,it also depends what car,motor and speedo your running 👍🏼
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TRADE FEED BACK.... http://www.oople.com/forums/showthread.php?t=34486
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Old 25-11-2015
jimjav jimjav is offline
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Blinky or open?

For blinky a safe option can be 6.0 and checking temps I am sure you can go for 5.5. With a fan I have gone down up to 5.1 without issues.

Cheers
Javier
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Old 25-11-2015
Scott_83 Scott_83 is offline
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Sounding dumb what does fdr stand for
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Old 26-11-2015
jimjav jimjav is offline
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fdr stands for Final drive ratio. Is the ratio between how many turn needs to be motor axle to move one turn tires.
It is really important as motors need to be geared properly or they get really hot and got damaged. That is why people tend to ask it a lot.
If the value is really high you will have a good acceleration but less speed. And if the number is smaller, you will increase speed but will have a lack of acceleration.

To obtain the value on your car you have to multiply internal ratio against the result of diving spur between pinion.
Example, Yokomo internal ratio 2.00. Spur 90 tooth, pinion 50 tooth -> (90/50)*2.00= 1.8*2.0=3.6

TC Mod is between 8.5 and 7.5
TC 13.5 open 7-6
TC 13.5 blinky 6-5
TC 17.5 blinky 4-3.2

Best reagrds
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