TT01 Gearing Suggestions

[Libertine]

I've got a TT01 and have recently bought a Tamiya Super Modified 11t motor for it.

It's nice and fast now, but I've a feeling I'm overgearing a little as the motor is very hot at the end of every run.

I've currently got the standard spur (61 tooth, I think) and a 23 tooth pinion. Is there any way I can cool the motor down without losing much of my top end speed?

I've a feeling that the only suggestion will be to use a smaller pinion, but as I'm relatively new to hop ups like this, I thought I'd ask.

Thanks in advance..[]

[30111987]

you could try just adding the aluminium motor heatsink...

[DJTheo]

With so hot motors like 11T you often get even higher speed when gearing it lower as when those motors are overgeared they don't reach their max RPM, so smaller pinion imho is the way to go, you will have almost only advanatges (better acceleration, longer run times, less heat/wear and maybe even higher top speed!)

Cheers

[Libertine]

quote:Originally posted by 30111987

you could try just adding the aluminium motor heatsink...

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Got that - and I've cut all the vents (that were previously just stickers) out of my old subaru shell and covered them with mesh, so that I get maximum airflow past the ESC and motor. It still gets pretty red hot (to the extent that I'm surprised the solder joints haven't come loose!).

Thanks DJTheo - I'll order myself a couple. It's got a 23t pinion in there at the moment, so I'll try it with a 21/22 and take it from there..

Is there any value in changing the spur gear? Or would that only be useful if I wanted to gear it higher/lower than just changing the pinion would allow?

[terry.sc]

The motor is way overgeared. The car is not designed to run low wind motors. The heat is because the gearing is putting a strain on the motor. Dropping one tooth on the pinion will not make much difference if any.

For an 11 turn motor I would suggest getting the smallest pinion and largest spur gear that will fit as a starting point. You will probably find its faster than the gearing you have now as the motor will be allowed to rev up in to its power band.

[Libertine]

Righto - I'll start by going down to the smallest pinion that fits, and then I'll see about ordering another spur if it's no better.

It would be great if this does improve performance, but I don't think the chassis can take a great deal more speed - it rolls over quite easily if you try sharp turns at speed, even on a perfectly flat surface (which is quite entertaining when it's only got an old body on it).

Methinks I need a chassis that is designed to take a bit more speed - maybe a TB02R or something like that.

Thanks everyone.