what does the 540 motor rev to?

[Jspec]

hi guys ive just got a 2003 TT-01 Nsx, its got a 540 motor, what does this motor rev to? and if i wanted to safely upgrade the motor with out changing anything else which motor is the best to use and what does that rev to?

thanx

[HunterZero]

Standard RS-540 motors are 27 turn and usually rev to about 14,000RPM. For a boost of speed, a Sport Tuned motor is a good first upgrade.

Before you do upgrade the motor, you should at the very least change all the plastic bearings in the car for ball bearings. This alone will increase speed and run time noticeably.

You might need to change the plastic center shaft for the hop-up aluminium one too.

Lastly (and most importantly) you need to make sure your electronic speed controller can handle the hotter motor. The standard kit ESC can handle a Sport Tuned, but not a lot more. Lower winds generaly = more RPM.

You also need to be careful about gearing the car. Overgearing can cause the motor and ESC to overheat.

If you plan on getting a hotter motor and your ESC can take it, a Trinity Chameleon 2 19 turn is a great motor. The Tamiya Super Stock RZ and TZ are good motors too.

- James

[xismxist]

I belivs that the 540 stock motors has more rpm then the "sport tuned" (20,000 vs 18,300) but the sport tuned motor has more torque

[XanderP]

I heard that the standard 540 is 14000 to 15000 revs and the sport tuned 18000 to 19000 revs but it has a lot more torque.

[xismxist]

no, its alot more. in a big test a couple of years ago between the bullhead and usa #1, did they clock bullhead to 21 km/h and usa1 to 28 km/h.... usa1 has 21,000 rpm motors and 20:1 in gear ratio. bullhead has 30:1 in gear ratio... now if the motors in bullhead only was 14,000 rpm, then the car wouldnt go 21 km/h. but the fact is.. it did, so the stock motors are around 20,000

[SJoerD]

You must take in account that the RPM specifications manufacturors advertise with, are mostly NOT under load, but freely rotating (AFAIK) - since the load differs from car to car, and you are also dealing with more friction losses when the motor is installed (which also differ from car to car). []

The Bullhead uses 2 motors (of which one in reverse direction) which will influence performance as well. Also, I am not sure how you're measurements are made, they may be slightly inaccurate (no offense), because of a possibly unprecise measurement - I think indirectly measuring the RPM like this will allow quite some errors to sneak in.

In my opinion, the top RPM of a motor is also not the most interresting factor, better would be if you would look at a power / RPM and torque / RPM curve, I beleive that on the Tamiya stock motors these diagrams are printed on the box. I am not sure about other makes though, never really seen it elsewhere before myself.

But perhaps it's best to just buy a good 19t motor of any well-known brand and stop worrying too much... lol

[DJTheo]

quote:The Bullhead uses 2 motors (of which one in reverse direction) which will influence performance as well.

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Stock silver cans have 0° timing, so no performance loss in reverse.

Cheers

[xismxist]

OK. but can some1 here email tamiya and ask about the rpm? =)

[DJTheo]

RPM depends on work load, you can get the curves at mabuchi and johnson homepages, but it won't tell you actually how fast it will turn in your car, if things would be so easy expensive dynos wouldn't be needed []

Cheers

[bender]

You also need to remember that these (540's) are generic electric motors, used in other applications besides r/c cars, and as such are not manufactured within a strict set of rpm guidelines. In other words, you can get fast ones, and you can get slow ones.

[xismxist]

this could be a johnson-motor some tamiya models come with (like bullhead)

http://www.johnsonelectric.com/product/pro...hp?ProdID=74--A

and what kinda mabuchi motors are they use?

the one i find who is for RC was only 11600 rpm on 6 volt.

[terry.sc]

11600 rpm at 6 volt sounds about right for a standard 540.

Both Johnson and Mabuchi motors are around those numbers.

[Shodog]

This site really needs a sticky or something as it answers many motor questions

http://home19.inet.tele.dk/martinjordt/res...tors/motors.htm

[xismxist]

a very good site!

[OneyedK]

[xismxist]

what does the "RH" stands for?

i belive its the "SH" motor who is the stock motor. but 17500 rpm at 12v seems to slow!