Scalextric motors

[btaylor]

" I do not have an air hose to blow the motor dry . ."[/quote]


I use canned PC air for small places that need air.

Bob

[ChallengerGuy]

I have a quick question on this topic...how do you measure RPMs of a motor like shown above (out of the car)? I have a very expensive dyno (by VRM) that I can use for HO and it's pretty much a requirement for tuning Fray cars (but some do it by ear and still win so there's that, but I digress). Of course, on the HO dyno, you measure at the rear wheels like on a 1:1 car based on the design of the pancake motor.

So, is there an article on measuring RPM on 1/32 can motors? That would be great as I have quite a few motors kicking around, not to mention the 200 sitting in the cars, so this would be nice to learn about.

Thanks!

[Ember]

You can buy a cheap laser tachometer on eBay and places like that. Then just make up a black disc with a reflective strip on it and run the motor naked (or near naked) from a variable PSU. It's not 100% accurate but near enough.

[btaylor]

" run the motor naked (or near naked)"

So your saying this process will work even if he left his socks on? :lol:

Im sorry, I just couldn't resist

Bob

[Ember]

(chuckle)
It depends whether or not he means business and if they're business socks.

[Modlerbob]

[sidedraft]

^^^^^Laser tach ebay 20 bucks well worth it!!, we test many motors after break in on water & alky at 12v, it does work averaging a 1,200+ rpm diff to the better. We then put them in the chassis & try gear sets, example 9 pinion slot it inline with a 25t crown on a NSR 40K at 14v we turn 15,000 + R's at the axle,, not bragging but my cars that have had this done are always up front.. Check out you tube look up Austin slot car club tunning tips,, they have some good ones! watch & then go run 'em down! ;)