RC Car General Discussions This forum is for all general discussions related to radio control cars. Check forums below for more specific categories if applicable.

Electric car beaks too soft! Help

Reply
Old 09-13-2017, 12:34 PM
  #1
Bob Corey
Thread Starter
 
Bob Corey's Avatar
 
Join Date: Sep 2017
Posts: 5
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Electric car beaks too soft! Help

I got the HPI Sprint 2 Sport and I immediatelly noticed that the breaks is very very soft. I'm used to the thunder tiger's nitro super breaking so I'm want to adjust them. How do I do that? Thank you
Bob Corey is offline  
Reply With Quote
Old 09-13-2017, 04:40 PM
  #2
seedygreenute
 
Join Date: Jan 2016
Posts: 204
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

There are 2 types of braking on electric cars .
Drag Brake - when you let off the throttle ( in neutral ) how quickly the car stops .
Brake / Brake Force - when you push the throttle forward .
Both should be adjustable in the ESC settings .
What ESC do you have ?
seedygreenute is offline  
Reply With Quote
Old 09-13-2017, 08:44 PM
  #3
Bob Corey
Thread Starter
 
Bob Corey's Avatar
 
Join Date: Sep 2017
Posts: 5
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Quote:
Originally Posted by seedygreenute View Post
What ESC do you have ?
Everything is stock on it: SC-3sWP2. I run a test run with more speed and the breaks seemed to stop fine with these super drifty tires but it's like ABS or something, you can't block the wheels. Can I adjust this for more break? I also found very annoying the fact that there's a gap on the steering system and when you hit a small rock the car might start turning...Should I start another thread for this? I found a video about replacing the front ball cups but I think there's a gap on this part too (Click image for larger version

Name:	s-l1600.jpg
Views:	12
Size:	66.8 KB
ID:	2231888) I don't know it's name.
Bob Corey is offline  
Reply With Quote
Old 09-14-2017, 02:21 AM
  #4
RustyUs
 
RustyUs's Avatar
 
Join Date: Oct 2012
Location: central PA
Posts: 3,577
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Brakes and breaks. You don't want your RC to break, but you do want your RC to have brakes to stop it.
RustyUs is offline  
Reply With Quote
Old 09-14-2017, 02:26 AM
  #5
RustyUs
 
RustyUs's Avatar
 
Join Date: Oct 2012
Location: central PA
Posts: 3,577
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

That SC-3SWP2 ESC doesn't have any brake adjustment. The only other thing to check is if your transmitter has any throttle EPA adjustment knobs/settings. Make sure the brake/reverse throttle EPA (if there is knob/setting) is set to 100%.

Last edited by RustyUs; 09-14-2017 at 02:30 AM.
RustyUs is offline  
Reply With Quote
Old 09-14-2017, 08:15 AM
  #6
seedygreenute
 
Join Date: Jan 2016
Posts: 204
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

After reading the manual I also found no adjustments for brakes !
The plug is in the right spot for brakes ?
You should be able to tighten that servo saver ( put more pressure on the spring ) .
seedygreenute is offline  
Reply With Quote
Old 09-14-2017, 02:18 PM
  #7
Bob Corey
Thread Starter
 
Bob Corey's Avatar
 
Join Date: Sep 2017
Posts: 5
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

With these tires I think I don't need more braking, I searched the manual a lot but I didn't find anything that could tighten up the breaks.
For the steering gap I did the mod of the Youtube video: "Hpi sprint 2 drift steering gap solve", it helped a little.
Now the problem is that the stock ball ends (ball cups) are not 100% tight and one by one they make the front wheels unstable...Which ones are the tightest ball cups? I saw there are metal ones with the ball pre-inserted in the cup and other normal plastic ones...

Last edited by Bob Corey; 09-16-2017 at 04:40 PM.
Bob Corey is offline  
Reply With Quote
Old 09-14-2017, 02:56 PM
  #8
RustyUs
 
RustyUs's Avatar
 
Join Date: Oct 2012
Location: central PA
Posts: 3,577
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

RPM is normally the go to company for my rod ends. You just gotta be sure of thread size as well as ball stud size. Lunsford has great rod ends as well.
RustyUs is offline  
Reply With Quote
Old 09-16-2017, 04:45 PM
  #9
Bob Corey
Thread Starter
 
Bob Corey's Avatar
 
Join Date: Sep 2017
Posts: 5
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

To have harder braking I should use another ESC? Better motors break better?
Bob Corey is offline  
Reply With Quote
Old 09-17-2017, 05:02 AM
  #10
RustyUs
 
RustyUs's Avatar
 
Join Date: Oct 2012
Location: central PA
Posts: 3,577
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

If you want adjustability of braking, I'd look into an ESC that is programmable.

Now you have me thinking about the brushed ESC in my stadium truck. It's, more or less, the same as your HPI. If you look at specs, you will see, a lot of times on brushed ESCs, the brake/reverse current is half of the forward current. Does that equate to 50% braking power available to motor? I don't know. I of course run on a dirt track, and rarely have need for full force brakes. My brushless ESCs are only set to 50% brake force on all of my 2wd/4wd RCs, and that is too much most of the time. My 4wd RCs will almost always lock up all four tires, and front end flipping will occur when traction is available.

Last edited by RustyUs; 09-17-2017 at 06:37 AM.
RustyUs is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 03:30 PM.