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Old 03-27-2008, 05:43 PM   #1
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Default HPI sprint 2 braking problem

Hi,
I've just purchased an HPI sprint 2 sport RTR and noticed that it is not braking at all! However, when I lift the car up in the air and apply brake, it does seem to work... (motor does its braking sound and the wheels stop) the problem is when the car is running, no braking power at all, it just freewheels. Reverse is working.

Could it be the ESC? its a HPI SC-15
the radio?
or maybe the belts?

Anyone else had similar trouble?

I've sent an email to HPI but since their support time is several days away I just thought I'd ask here
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Old 03-27-2008, 05:46 PM   #2
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You should try to reset the ESC.
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Old 03-27-2008, 05:46 PM   #3
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The ESC is set up to were when you plug the battery in the first action you do with the trigger is the throttle and then you have to hit the trigger the oppposite way so the sc knows what the brakes are. So when you first turn on the ESC hit the throttle all the way and then go to neutral and then apply full brakes and then the brakes should work.
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Old 03-27-2008, 05:48 PM   #4
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you've tested it in the air, now test it on the ground. full throttle and apply brakes at a certain point until it stops. then full throttle and let go of the throttle and see if it stops at the same point that you used your brakes. did you roll past the stopping point?
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Old 03-27-2008, 06:29 PM   #5
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Quote:
Originally Posted by beta bob View Post
The ESC is set up to were when you plug the battery in the first action you do with the trigger is the throttle and then you have to hit the trigger the oppposite way so the sc knows what the brakes are. So when you first turn on the ESC hit the throttle all the way and then go to neutral and then apply full brakes and then the brakes should work.
Thanks for the quick reply! I thought this would do it, but it does not. Maybe there is another way to recalibrate or reset this ESC?

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Originally Posted by bionictony View Post
you've tested it in the air, now test it on the ground. full throttle and apply brakes at a certain point until it stops. then full throttle and let go of the throttle and see if it stops at the same point that you used your brakes. did you roll past the stopping point?
I've tried it on the ground and if there is any braking you can hardly notice it... its like if the braking power was set at 5% (you only notice it in the air) on the ground its useless.

Try this... I have tried applying a bit of throttle, then full brakes while on the ground (then I wait for it to freewheel and stop) then I manually give the car a push (while the brake is on) and the car offers no resistance, it just moves... I bet this is not normal right?
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Old 03-28-2008, 07:13 AM   #6
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Do you have the manual still for the ESC???
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Old 03-31-2008, 06:40 PM   #7
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Quote:
Originally Posted by beta bob View Post
Do you have the manual still for the ESC???
No, it just came with the manual for the car.
Well I sent an email some days ago and still no reply from HPI support...
I have noticed that on pavement going full speed the car does brake but its not a strong brake (barely usable if there's trouble ahead), wonder if this has to do anything with adjusting the belts. In my offroad electrics I'm used to having a very strong brake...
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Old 08-26-2009, 12:15 AM   #8
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Hi, did you sort this issue out? im having the same trouble
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Old 09-08-2009, 03:20 AM   #9
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i know its an old thread but anyone?

I wanna stop
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