pinion/spur gear setup for b4?? please help. newbie here
 

i just bought a b4, and i ordered a tekin rs pro and redline 13.5t motor. what should i buy for pinion and spur gear combos? please help!!!

Is your racetrack big or small?

i dont know what you would call big. its middle sized if i had to guess.

Measure it in length that will help us all out. I run 78/24 at LIR its a medium /small track we run around 20-25 seconds per lap.

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well im guessing its larger than yours... it about 70 ft long and it has 6 lanes. with some serious straights.

ok, so whats the smallest spur and largest pinion i can run? safely without overheating my motor? i want some good accelleration...

The largest pinion and smallest spur will kill your acceleration and make your motor overheat.
I would start with a 25 tooth pinion on your stock spur. If you need more top speed you can go up from there but I would check temps often. Keep the motor under 180F and you can do just about whatever you like.

81t is stock?

I'd agree that 25-26T is a good place to start. With the RS Pro you can use Boost or Turbo features to get the top end if needed for that 1 extra second at the end of the straight, no point in overgearing.

i am runing 78/26 on my car and i am runing a 10.5. So if you are runing a 13.5 i would start at 78/28 and go from there.

I run Tekin stuff also, and I had my 13.5 geared at 72/29-31 depending on track conditions, make a few laps and check your motor temp. A 13.5 with an RS pro you really wont have too many issues with the esc, but keep the motor below 180*

ask people what they are running and gear down a bit cuz u got the tekin

??? have you run Tekin before ???

when i had a 13.5 in my b4 i was running 72/34 and it would come off the track around 145-150, but the track i was doing that at was kinda small

What are you running for ESC, Motors?