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Old 07-30-2014, 04:13 PM   #1
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Default Tamiya TRF417V5 gearing help

New to onroad. Race 1/8 E buggy.

Have got a TRF417V5 that I plan to run on medium/large outdoor asphalt tracks.

The car is fitted with a 103T spur and I have several pinion gears (43, 44, 45, 47 and 48).

I have no clue about gearing the car. Can't find any clear information that helps me in my specific situation.

Can I use any of my pinion gears with the 103T spur gear on medium/large outdoor asphalt tracks without damaging anything, or are they totally "out of range"?

I run a Speed Passion GT2.0 Pro in default settings, and a Speed Passion 7.5T motor with the timing endbell set to medium (in the middle).

Thanks!
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Old 07-30-2014, 04:50 PM   #2
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Originally Posted by Salkin View Post
New to onroad. Race 1/8 E buggy.

Have got a TRF417V5 that I plan to run on medium/large outdoor asphalt tracks.

The car is fitted with a 103T spur and I have several pinion gears (43, 44, 45, 47 and 48).

I have no clue about gearing the car. Can't find any clear information that helps me in my specific situation.

Can I use any of my pinion gears with the 103T spur gear on medium/large outdoor asphalt tracks without damaging anything, or are they totally "out of range"?

I run a Speed Passion GT2.0 Pro in default settings, and a Speed Passion 7.5T motor with the timing endbell set to medium (in the middle).

Thanks!
You want to ask the guys at the track what FDR they run. Then to caclulate it for the 417v5 you just need the following

(Spur gear / pinion) * internal ratio = FDR

The 417 has an internal ratio of 1.9473

So you can work out the pinion you need by redoing the calculation e.g

103/43 * 1.9473 = a FDR of 4.66

Personally I think you need a higher FDR to start out with (around 6) so fit the smallest pinion you have now but check at your club and see what they suggest
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Old 07-30-2014, 05:43 PM   #3
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Thanks for your answer.

Yes, I saw the FDR calculation in the TRF417 manual and made the calculation and realized, that the FDR with a 103T/43T was in the lowest part of the FDR charts in the manual.

I will ask at the track, at keep an eye on temps until I get it sorted out-
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Old 01-17-2016, 06:00 AM   #4
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Default trf 417 gearing

hi please can anyone help i got a TRF417v5 what pinion will be best to start with on a medium size carpet track. my spur gear is 111t motor lrp x20 13,5 t
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Old 01-17-2016, 02:15 PM   #5
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111 is a large (too large) spur for 13.5 and will need a pinion in the 50t range to get an acceptable FDR (around 3.9-4.1 as a start with an X20, if zero timing ESC). Not actually even sure a 50+ will fit under the top deck to be honest.

Get a 96 and things will be much easier.
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