Motor lengths and diameters.

[Shimmy]

Hey fellas...

I did a quick search, couldnt find the info I'm after.

I would like to know how much a difference does length and diameter make to brushless motors?

If I understand correctly, the torque comes from length?

How much difference would there be between, say a 4074 and a 4082?
Or for that matter a 3674 and a 4074?

I am going about my way to convert an MBX5T but not 100% sure on what motor to go for.

Ultimately I would like to go for the Castle 1717 at $70 but from what I can see and understand, there is no way it would fit and might be a bit too much power.

I am looking at going the leopard 4082 2.5Y 1250kv.
I am just bashing it at the moment, if that helps any.
I have decided to go for the HK 150a esc, not only because it is cheap but because I plan on waterproofing it (well, water resistance, it wont be submerged but will likely have the odd splash of water.
A Wye round motor would be better than a delta round motor for something as heavy as a truggy right?

Also, are there any tie down clamps or something for these long motors?
Something to hold the back end down solid so it doesnt move or bend or rip out the screws on a hard landing.