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Old 12-26-2009, 03:23 PM   #1
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Default Top Photon gear ratio problem

Hi peeps. I'm over here in europe and bought a photon to run in a series where the gear ratio can't be longer then 1:5,0
what 48 pitch pinion & spur gear would reach this gear limit? I'm retarded when it comes to math so if you could throw a few
spur/pinion combinations my way It would help me alot. the race is next weekend and the car is on the way in the mail.
I think the car comes with 64 pitch spur but I don't have any of those pinions
I still have some 48 pitch pinions and spur gears (zenon) from my Serpent S400
we're running on carpet (long and sweeping, few tight corners) mit lrp 17.5T brushless and vtec cpx rubber tires. Thanx in advance!
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Old 12-26-2009, 03:34 PM   #2
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hello
70/28
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Old 12-26-2009, 03:44 PM   #3
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Thats a start cause i have pinions up to 34. what pinion could i use with a 78 spur gear? (the only spur i have at the moment)
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Old 12-26-2009, 04:26 PM   #4
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hello
78/31
greets marcel
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Old 12-27-2009, 05:29 AM   #5
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the formula for FDR is: spur / pinion * internal

we know your FDR, Spur and internal... so to get a pinion (roughly) you'd do:

Spur / (FDR / Internal)

78 / (5 / 2)

= 31.2 (so a 31 tooth pinion)
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