View Single Post
  #20  
Old 20-02-2017
MiCk B.'s Avatar
MiCk B. MiCk B. is offline
oOple Advertiser
 
Join Date: Nov 2006
Location: Dublin, Ireland
Posts: 1,431
Default

Quote:
Originally Posted by jimny82 View Post
Can anyone explain why I might cook my electronics changing from a 23/83 to a 25/76 ratio. I don't really understand the 'delta' of toot difference, but just thought the motor & ESC would be able to handle either ratio, and it would just be the power delivery that would be affected?
Hi,

Have a look at a gear ratio chart for the car you are running. There is a serious difference between the two ratios you have above.

Assume internal gearbox ratio is 2.6:1, but check for the car you are running.

23/83 overall is 9.3
25/76 overall is 7.8

The difference between then is far too much, to be usable on the same motor.

(9.3 is gearing for 7.5t motor, 7.8 is gearing for 10.5t motor.)


If your gearing is in the right area, try a pinion up or down and see how the car reacts.
So in the above going to 24/83, which will give more top speed, your overall is now 9.0

MiCk B. :-)
__________________
http://www.dublinmodelracing.com/
(Off-road racing in Dublin)

http://www.p-dubracing.co.uk
(Stocking: 8Racing / AVID / GHEA / Xpert Racing / Factory R/C / Alton Design Innovations)

http://www.msdmodels.ie/
(Trackside and on-line RC supplies.)

Reply With Quote