So...these brushless motors

[maineyak]

In my day we had brushed motors with all sorts of characteristics and we used to swap them to suit the track layout and grip levels. So say it was a grassy track with high grip you would put something punchy like a triple or quad in but if say it was slippy but the track had a long straight you would put in a single which had less torque but more RPM for the straight.

So cut to modern day. 2WD buggy and I have a 10.5, 8.5 and 6.5T choice.

It seems to me these motors all have the same power curve characteristics and they are simply faster than one another? Or does a 6.5T have less torque than a 8.5T but more RPM? (not tried my 6.5 yet!)

Also turning up the timing. Does that increase RPM and reduce torque? To me it just increases both!! e.g. turn up the timing on an 10.5 and basically it is as fast as a non-timed 8.5t.

Am I missing some subtleties here??

[Rosc0PColtrane]

Forgive my ignorance, but surely you can control the characteristics now through the esc programming and spur/pinion choice?

[mattr]

As far as i can tell, each motor has a useful range of adjustments via the esc/timing. Boost it up too much and you'll cook it, turn it down too much and you'll have no torque.
The range is just far far wider than it used to be on brushed motors (and even brushless motors with cheaper ESCs)

Just pick a sort of suitableish motor, and play with timing/ratios/set up.

Its a bit like trying to get a massively turboed, low compression ratio racing engine to produce 100 hp, you can do it, but it'll be terrible to drive, same with trying to get 300 hp out of a 1.4 supermini engine.

(I've found that an 8.5 will do all you want in 2wd outdoors, 10.5 indoors)

[RudolfXC]

Originally Posted by mattr

As far as i can tell, each motor has a useful range of adjustments via the esc/timing. Boost it up too much and you'll cook it, turn it down too much and you'll have no torque.
The range is just far far wider than it used to be on brushed motors (and even brushless motors with cheaper ESCs)

Just pick a sort of suitableish motor, and play with timing/ratios/set up.

Its a bit like trying to get a massively turboed, low compression ratio racing engine to produce 100 hp, you can do it, but it'll be terrible to drive, same with trying to get 300 hp out of a 1.4 supermini engine.

(I've found that an 8.5 will do all you want in 2wd outdoors, 10.5 indoors)

Decreasing tinming gives more torque, increasing give more revs.

[mattr]

Originally Posted by RudolfXC

Decreasing tinming gives more torque, increasing give more revs.

I knew i'd make a mistake.