VQS Pinion

[rwordenjr]

With a 13.5t brushless combo, which pinion from the manual would be the best? 20t, 21t (stock), or 22t 

[shenlonco]

Hi I would say use a lot  smaller one with the higher RPM 13.5T motor. 

[rwordenjr]

2 hours ago, shenlonco said:

Hi I would say use a lot  smaller one with the higher RPM 13.5T motor. 

how low you thinking? and which motor you got in yours?

[shenlonco]

2 hours ago, rwordenjr said:

how low you thinking? and which motor you got in yours?

I tried a 21T motor with a 18T pinion gear. so a 13.5T is 3500KV X your battery lipo 7.4v = 25,900 RPM So I would start out with a low pinion gear and work your way up also use steel ones those stock tamiya ones melt away like butter Robinson racing makes .06 mod steel ones for the tamiyas.

[Jonathon Gillham]

Go the biggest you can fit. A brushless motor has a lot more torque than brushed, the FDR of 8.33 (I think thats the VQS with w2T pinion) is probably suited to 8.5 - 10.5T motors. Wind the timing up on the can too. Run it for a minute, check its not too hot, then 2 mins, check again. It shoukd be fine though as 8.33 is undergeared for a 13.5T motor.

What sized wheels does it have? I'm assuming the smaller Tamiya ones, not the standard modern 2.2"? That lowers the gearing even more 

[shenlonco]

14 hours ago, Jonathon Gillham said:

Go the biggest you can fit. A brushless motor has a lot more torque than brushed, the FDR of 8.33 (I think thats the VQS with w2T pinion) is probably suited to 8.5 - 10.5T motors. Wind the timing up on the can too. Run it for a minute, check its not too hot, then 2 mins, check again. It shoukd be fine though as 8.33 is undergeared for a 13.5T motor.

What sized wheels does it have? I'm assuming the smaller Tamiya ones, not the standard modern 2.2"? That lowers the gearing even more 

Why that's backwards you never start tuning with the largest pinion you always start with a smaller one watch the motor and esc temps and go up in pinion size to find the sweet spot?

[Jonathon Gillham]

3 hours ago, shenlonco said:

Why that's backwards you never start tuning with the largest pinion you always start with a smaller one watch the motor and esc temps and go up in pinion size to find the sweet spot?

Just beacuse the FDR of 8.33 is too high for a 13.5T motor. Endbell timing is the only tuning really available in this case which isn't ideal as usually you'd set that and leave it. The testing is only to be safe as the gearing will be fine, but timing could be too high, binding in the dtiverain etc.

I'm pretty sure the VQS wheels are smaller than modern ones too which means the gearing is effectively lower still

One problem with Rere's, the gearing is all wrong for modern electronics. 

[Raman36]

I have 13.5 with 24 pinion in my Egress on 2S and it’s not that fast.. so don’t even worry about it… as the the FDR is really high