Need help with brushless setup

[eddscott]

I need some help choosing a decent brushless setup.

I recently a Turnigy Trackstar 100a and a Hobbywing XCar 13.5T motor.

I don't have lots of experience with brushless and having spent a good couple of hours trying to get the above to work I can only assume one or the other is knackered.

The motor stutters and jitters with the sensor wire connected and goes forward OK without but stutters in reverse. I've got a Speed Passion 6.5T so hooked that up and it worked OK forwards but only went backwards one every few tries. Although some have obviously had good luck with this cheap stuff, I haven't! I've got the Savox low profile servo with a KO modded 2.4FRSky system in this car. I've read that I might need a BEC but a bit put off spending more money trying to get this system working.

The car its going in is a tourer and I'm just starting a bit of club racing so don't want anything too fast. I was thinking of one of the new SP Reventons with a SP motor but not sure which to go for.

Any help really appreciated

[Hpi_guy]

Try a new sensor wire, and turn reverse off, let us know how that goes

[CrashBangWallop]

If you are using a Savox low profile servo i will assume its a high torque metal geared digital 1351mg ?
These are a bit power hungry and the ESC supply to the receiver may be a bit underpowered for it, there is one acid test - disconnect the steering servo from the receiver and test your speedo setup again without it connected.
The cure is to add a power capacitor to a spare port on your receiver this normally cures the problem unless you have a dodgy sensor wire.