pinions????

[racingreen]

what difference will it make by changing the pininon??

ben

 

[stuie-t]

bigger pinion: higher top speed but worse aceleration

smaller pinion: lower top speed, better aceleration

[Nitro_John]

Generally more acceleration with a smaller pinion but less top speed and a higher top speed with less acceleration with a larger pinion

[Nitro_John]

lol, stuie-t beat me to the answer []

[racingreen]

so which one is the best to go for???and will they work on a standard motor??

[Gruntfuggly]

You'll have to try them...

[Nitro_John]

It depends on the track and your driving style, I always prefer slightly more acceleration, but don't over do it with too small a pinion as the motor will over rev causing it to overheat.

[racingreen]

where is the best place to buy them and the cheapest???/

[GPZ1000RX]

The above advice is true, except for the bit about the overheating!

You WILL NOT overheat your motor by fitting a SMALLER pinion. The reverse is the case, a LARGER pinion may make your motor overheat.

Electric motors want to rev, let them do so. If you fit too small a pinion all you will lose is a little speed, if you fit too large a pinion there is a good chance that the motor might overheat, your runtime will go down, battery may overheat and so could the speed control.

Overgearing (too large pinion and/or too small spur) is the enemy of your car, unless you are doing some serious racing and are prepared to pay the price DON'T do it.

 

[GPZ1000RX]

PS. The above refers to electric motors, I can't speak for glow engines!

[racingreen]

so say i placed a 20t pinion on to the stock motor......would that work with a mtronics viper eco27??

[racingreen]

also what would happen if i placed a 27t pinion onto a 20t motor what would be the outcome??

[GPZ1000RX]

How many teeth are on the standard pinion?

[racingreen]

is it 27????

[mr_pushrod]

We need more details, there are many cars that use many different pinions. What car do you have?

[racingreen]

after a quick look in the manual i have found that my kyosho is a 25t. it is a 1997 kyosho pureten ff

[r6stu]

For a stock 27t motor you need a gear ratio of 6.5. to work this out you need to devide the spur pin size by the pinion gear and multiple by the internal gear ratio of your car!

All of this should be in the manual for the car.

[GPZ1000RX]

With a 20T pinion you will get better acceleration at the expense of some top speed, you will also get better run time from a charge. To expand a little on my other post you may not get a higher top speed if, for example, you went to a 30T as the existing motor may not be able to "pull" the raised gearing. Also on a tight indoor race track a high top speed would be of little use!

If you are a beginner gear as low as you can, you'll enjoy the longer run time, learn how to drive and have less  costly accidents (due to the lower speeds). Another bonus is you don't need anything other than a smaller pinion to gear down, if you gear up chances are you will have to spend money upgrading things to cope!

I have done a lot of club racing along with both of my sons, and as soon as I thought they could handle more speed I provided it, the results for both of them first time I tried were SLOWER lap times! they couldn't handle the higher pace and crashed much more. Crashes were also harder and did more damage due to the greater speed. There is a saying " To finish first, first you must finish" very true with RC cars. 

Slow and steady often does win the begginers class!