XRAY - Model racing cars
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Correct gear ratio on X1 running on carpet
http://forum.teamxray.com/viewtopic.php?f=109&t=19227
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Author:  MikeD [ Fri Jan 08, 2016 11:49:03 ]
Post subject:  Correct gear ratio on X1 running on carpet

Hi
I need some help on gear ratios. I am running a 21.5t motor(Thunder Power) with a 2 cell shorty. I put an 80t spur to a 30t pinion (64dp 2.666) on carpet
I ran the car for the first time last night at the Stafford club and the motor got so hot that I think it has melted, it's dead anyway :cry:
The gear mesh was fine and everything was free running.
I have obviously got something wrong big time. I have looked online and people are saying that they are running similar ratios
HELP :oops:

Author:  RaThEiSkY [ Tue Jan 12, 2016 09:50:41 ]
Post subject:  Re: Correct gear ratio on X1 running on carpet

Hi Mike,
we normally run between 2.4 and 2.6 indoor with our 21.5 Motors so you dont make something wrong.

Do you use maybe to much timing ? Or try another brand to check the temperature ? Maybe there was the problem.

greetings

Jan

Author:  MikeD [ Thu Jan 14, 2016 13:14:22 ]
Post subject:  Re: Correct gear ratio on X1 running on carpet

Hi, thanks for the reply. Strange as this is around the ratio i'm running! I'm running very little timing on the motor and blinky on the ESC. I have put another motor in so will try again tonight.
Some drivers say to run 3.2:1 and 2.6 is way to high?
Getting confused, could always be a duff motor!

Author:  jurejurman [ Mon Feb 15, 2016 12:00:25 ]
Post subject:  Re: Correct gear ratio on X1 running on carpet

Hi MikeD, i have asked same Q? ...but depends from the track. I had been runing the 2.6-2.7 ratio and found the motor getting hot (xray x1 /lrp x20 21.5/HW stock 60A/2s shorty / RIDE XR / http://www.genius-racing.com/pista-indoor.html).
In the end I have found/have been recommended for this setup the best GR 2.9-3.1. The temps are fine and the car goes for me. In and from the cornes is more quick. Lap times are better.
....just my 2cent advice
8)
Jurij

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