jakeg1999

iTrader: (47)

Thank you.......what a bummer!!!!

omalley72

iTrader: (18)

I just picked up a CR and will be putting it all together this weekend but I need advice on which servo to run? More speed than torque, more torque than speed, what are good numbers?

PaPeRo

For Mini sized cars you don't need much torque. All standard sized servos will have enough torque. In terms of speed sometimes too much speed can make the steering twitchy it really depends on your driving style.

With that said any standard sized servo with a speed of around 0.10 sec@6V is good. Look for quality dual ball bearing metal geared digital servos.

Mark G.

iTrader: (4)

If anyone out there is interested in purchasing a Cup Racer running chassis only, please let me know by PM. I'll forward pics to those that are interested.

David-M

If I try to run RWD what should I do to the front differential to get good performance? Soften? Harden? Lock?
Thanks

PaPeRo

Remove the dogbones and differential drive cups then put small piece of foam in the the holes where the drive cups were to prevent dirt from getting in the differential.

David-M

Oh, thank you, then make everything free?

Raman

iTrader: (94)

Yes, then it will be 2 wheel drive

David-M

hehe, sure...I'll try to run against m-05

PaPeRo

Disregard what I mentioned earlier as I just remembered that the CR use ball differentials so the drive cups do not/cannot need to be removed from the front differential. What you need to do is remove the front dog bones AND the center prop shaft.

David-M

well, yes, I remove the whole front differential and leave only the box...no?

PaPeRo

No you do not need to remove the front ball diff, all you need to do is remove the two front L/R dog bones and the long prop shaft that connects the front and rear diffs. This way the rear diff works like normal and is completely disconnected from the front diff so there less drive loss. If you leave the prop shaft in it will still work but you lose efficiency because the motor will still have to turn the front ball diff even if it's not connected to the front wheels.

David-M

This is certainly the fastest and easily reversible solution. I'll start like that, if the car is fine then I can remove the whole front differential to save further weight...

cannon

iTrader: (35)

I can tell you now that the Cup racer in 2WD is a bag of sh*t.

Hara ran a switch at the TITC event in Thailand. As it was uncompetitive he tried a 2WD Cup racer and it was even worse to the point where he gave up in the final

David-M

mmm. bad news, although a little I thought it