I bought a S747e some weeks ago to run it besides my nitro S747 and to run it in times our track doesn't alow to run nitro.
Why a S747e in stead of a S411? I had already the spare parts, tires, bodys,...
I run a Tekin RX8 gen 2 with a LRP 4-pole 4800kV motor and LRP 3S lipo packs.
This works very well.
Originally Posted by
dan_vector
With gearing I haven't found I needed to change the stock spur as the motor mount allows a wide range of pinion sizes to be used. There is a great rollout and final drive calculator on the serpent site that you can download. It takes into account tyre sizes and cell count and motor kv. Id stick to 48dp gears as well as I'm not sure 64dp would handle the torque.
What spur/pinion combo would you suggest for a large outdoor nitro onroad track? I run the stock 72T spur and I tried pinions 20, 21 and 22T.
My motortemps are always around 75°C after a good 5 minutes of racing. I have a Castle creaction fan on the motor but I think this doesn't make a big difference. (I haven' tested without it)