tmaxx 3.3 spur gear question

[knall]

The newer tmaxx (model 4908) comes with a 58 tooth spur I THINK and they advertize the top speed as being higher than the older version (4909) that comes with a 54 tooth spur I THINK.



What gives? its the same engine? The smaller spur SHOULD be higher top speed?


Am I wrong about the size spurs? Do I have a non factory spur? Is there some other diferance I am not aware of?

I got a used 4909 with a 54 tooth spur (I counted the teeth). Its PLENTY FAST top end wise. I am running a LOT of aluminum and a roll cage as well. So its a bit heavy. It wont wheelie to save its life.... so I am thinking of either getting a 56 or a 58 tooth spur. What size spur SHOULD the 4909 have on it from the factory?

Should I go w the 56 or the 58? I want more bottom end.... and it would be nice to wheelie..... but I dont wanna be flippin over everytime I touch the gas.

THANKS!!!!!!!!!!

 

[94stanggt]

Changing the spur gear is more fine tuning your gear ratio when it comes to the gear ratio between the spur and the clutch bell. If you want a bigger change in torque change out your clutch bell. If you want to change in smaller increments to get more torque, put more teeth on the spur gear. stock I believe on the spur is 58 teeth; on the clutch bell I dont know if this is stock but I have 22 teeth.
In your case i think you are running a small spur gear so I would go up to the 58 teeth spur and see how you like it. If you want more torque then get a new clutch bell.

 

[caba_750]

i have a gen 3 spur 54t rrp and a rrp 24t i not sure if i should install this spur the spur gear i have now is a 54t rrp is the rrp the same material i once had integy spur with stock tmaxx clucth bell and it got messed up by the integy spur i now have the macthing set still do not know if i should change it with this neww prouduct the rrp made

 

[Snook Man]

What gives? its the same engine? The smaller spur SHOULD be higher top speed?


Am I wrong about the size spurs? Do I have a non factory spur? Is there some other diferance I am not aware of?

You are correct with the spur gear sizes and both trucks use a 22T clutch bell stock. The difference in speed is the size of the wheels. 4908/7 being a larger diameter than the 4909. Spur gear size has much less effect on top speed than tire diameter does.

Get both of the spurs to experimant with. A few different size bells never hurt either.


All RRP gears are hardened and will work well with each other.