Where have my brakes gone? Any help appreciated

[Neil Skull]

Originally Posted by RogerM

At Petit I was really noticing a lack of brakes, that is the reason I made the (completely wrong) decision to put a front diff in for the final … made the car handling not to my tastes but still with no brakes! This was costing me LOADS of time as I couldn’t stay on the power for the straight or else I’ve overshoot the “wall of death” and could only blip the throttle through the infield as if I built any speed I couldn’t get it into the next corner.

I am 95% sure that the brakes are causing the slipper to slip but will try locking the slipper up just to be sure.

Speedo & transmiter are still adjusted correctly for brake side EPA, set to 100% brakes, running a little drag brake (still can’t drive with a free rolling brushless motor!) and initial brakes set to the same as drag brakes.

When I jam the brakes on whilst holding the car the wheels don't stop immediately, only a small delay but the same speedo setup (but with a milder motor) in the 2wd car almost flip the car out of your hand.

The brakes on the same set-up used to be awesome!

Have I killed the motor / speedo and if so how?

Going to try another motor but don't have another equivelent (will have to be the 2 winds milder one out of the RB5) so may not be the best comparison.

Any help appreciated.

Roger,

firstly try swapping your esc over. At least that way you will know where the problem comes from.

As i understand heavy braking can put the biggest stress on an esc so maybe its like a fet or something gone. I am not 100% sure on that just a guess.

[RogerM]

Right after a hard days work, and a hard nights work too I've finally had time to have a quick look over the car.

It's not a transmitter setting, it doesn't seem to be the motor (how much have you got to love the Speed Passion plug in V3.0 motors!!!) as substituting the motor for a known good one from the RB5 seems to make no difference.

All ESC settings reset again, still the same .... but a firmware update (to the one mentioned on another thread) seems to have, in the hands at least, sorted the problem. My conclusion is that I must have messed up the previous firmware update and just not noticed the lack of brakes at the previous meeting!

My LPF has worked faultlessly and has only ever been on the factory supplied firmware.

So there we go, thanks for all the suggestions but it seems it was a user error on my part (hopefully), not quite as big a silly as DCM's suggestion but my own fault none the less!!!

I'm still getting used to the brushless motors, as recently as just before Xmas I was seriously considering going back to what I knew, 20+ years of tuning brushed motors, but I'm getting there now and still hugely impressed with the Speed Passion stuff.

Hopefully it'll all be working properly for Friday night at Hereford

Thanks again to all those who took the time to offer assistance and share their experiences it's what makes the oOpple community great to be a part of