Gearing for a Losi 7.5T brushless on a B4

[mikeyscott]

Can someone advise on the above. I assume it'll be like a 12 x brushed motor

[markwilliamson2001]

23 pinion to start? standard spur?

Does it give any recommendations for overall ratio in the manual? If so it can be worked out by:

Spur/pinion ration = external ratio
External Ratio x Gearbox ration = overall ratio...

e.g. 81/23 = 3.52
3.52 x 2.6:1 = 9.12 (overall ratio!)

HTH
Mark

[emtee]

Drop onto the Associated website and view/download the build manual... suggested ratios are near the back of the manual...

[westie]

Ive started off with a 18tooth with the standard spur and see how it goes. The manuals always seem to have really high gearing. better to let her rev than getting hot.

westw00d

[mikeyscott]

Originally Posted by westie

Ive started off with a 18tooth with the standard spur and see how it goes. The manuals always seem to have really high gearing. better to let her rev than getting hot.

westw00d

Interesting thought, I might dig out a 19/20 pinion and see how it goes. Got to wire it in tonight and then replace the radio gear tomorrow with a 2.4Ghz Helios

[Northy]

I'm on 24/87 in the X-6 (same thing) and am thinking of going up to 25.

Brushless get too hot if under-geared also

G

[mikeyscott]

Well I geared my 7.5 x11 81/24 and it ran very well, maybe a bit too quick.. Will see what happens this weekend at the track