R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 04-28-2008, 05:52 PM   #1051
Tech Master
 
TonysScrews's Avatar
 
Join Date: Jan 2006
Location: Central NJ
Posts: 1,660
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Starter box View Post
Hi,

Question about the stock brakes (steel rotors with steel calipers and blue pads):

After racing last weekend my front brake performs unevenly.

When the motor idles, the rotor can spin freely (with approx. 0.2mm clearance), but gets caught between the pads once in a while. Also, when actually applying the brake, it shows uneven brake performance; something like little grip for 1/4 turn of the rotor, tight grip for the next 1/4 turn and so on.

I had changed the rotor already, but same thing after just one race. Rotors, calipers and pads are pretty new. Can it be that the screws that hold the calipers are threaded into the plastic at an angle?

Any other ideas what could be the cause of this?

Thanks a lot,
Frank
Ditch the pads and run just the metal calipers on Thunder Tiger option discs (Part # PD1861). You can also use the o-ring trick I got from Ralph Walters of Innovative Design to get the brakes even better. Just use a thin o-ring (like the one from a carb insert) and put them in between the pads, wrap around the center diff mount and then attach to the back of the brake screws poking out the back (use screws long enough so they poke out about 2.0mm). You'll be able to adjust less play out of the brakes so they are much more responsive plus they won't drag. Finally, you can very carefully cut cross hairs on the TTR discs like a tic-tac-toe board (#) using a hacksaw blade. Just make sure the blade is flush and barely cut into the ceramic material on both sides of the discs. The brakes will never feel better
__________________
Tony P.

Tonys Screws LLC
http://www.tonysscrews.com
High Grade Alloy Steel Screws, Screw Kits and Mugen Parts
TonysScrews is offline   Reply With Quote
Old 04-29-2008, 09:23 AM   #1052
Tech Addict
 
slow coach's Avatar
 
Join Date: Oct 2003
Location: guernsey C.I.
Posts: 626
Default

Tony is that idea with the o rings just to hold the back pad tight to the center mount ?? what about a small o ring between the pads
__________________
Kyosho MP9TKI2 soon to be TKI3, Novarossi, SMD, GM Racing, www.grccc.org
a great wife and lovely kids
what more can you ask for
a win on the lottery :D
slow coach is offline   Reply With Quote
Old 04-29-2008, 08:28 PM   #1053
Tech Adept
 
Starter box's Avatar
 
Join Date: Jan 2008
Location: Bennington, NE
Posts: 135
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by TonysScrews View Post
Ditch the pads and run just the metal calipers on Thunder Tiger option discs (Part # PD1861). You can also use the o-ring trick I got from Ralph Walters of Innovative Design to get the brakes even better. Just use a thin o-ring (like the one from a carb insert) and put them in between the pads, wrap around the center diff mount and then attach to the back of the brake screws poking out the back (use screws long enough so they poke out about 2.0mm). You'll be able to adjust less play out of the brakes so they are much more responsive plus they won't drag. Finally, you can very carefully cut cross hairs on the TTR discs like a tic-tac-toe board (#) using a hacksaw blade. Just make sure the blade is flush and barely cut into the ceramic material on both sides of the discs. The brakes will never feel better
Hi Tony,

Thanks a lot for your tips! A friend from the race track told me that you want to dremel little cutouts for the dogbone pins?

Thanks,
Frank
Starter box is offline   Reply With Quote
Old 04-29-2008, 08:57 PM   #1054
Tech Adept
 
Vsfriedmugan's Avatar
 
Join Date: Feb 2008
Location: Shreveport, LA.
Posts: 187
Send a message via MSN to Vsfriedmugan
Default

i use these and they work really well


http://www.carolinasrc.com/Webstore/...idproduct=1037
__________________
MBX6>>FUTABA>BYRON FUEL>O.S>ProTek>HITEC
and a mask to inhale nitro fumes
Vsfriedmugan is offline   Reply With Quote
Old 04-29-2008, 09:22 PM   #1055
Tech Master
 
TonysScrews's Avatar
 
Join Date: Jan 2006
Location: Central NJ
Posts: 1,660
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by slow coach View Post
Tony is that idea with the o rings just to hold the back pad tight to the center mount ?? what about a small o ring between the pads
Yes the o-ring wrapped around the diff mount holds the inside pad tight against the center mount. Using just a small o-ring between the pads doesn't work so well. You need to have play so the disc spins freely but the inside pad needs to be tight so the brakes don't drag as you work the throttle.
__________________
Tony P.

Tonys Screws LLC
http://www.tonysscrews.com
High Grade Alloy Steel Screws, Screw Kits and Mugen Parts
TonysScrews is offline   Reply With Quote
Old 04-29-2008, 09:43 PM   #1056
Tech Elite
 
ezveedub's Avatar
 
Join Date: Aug 2004
Location: Fort Lauderdale, FL
Posts: 2,411
Trader Rating: 14 (100%+)
Send a message via AIM to ezveedub Send a message via Yahoo to ezveedub
Default

Quote:
Originally Posted by TonysScrews View Post
Yes the o-ring wrapped around the diff mount holds the inside pad tight against the center mount. Using just a small o-ring between the pads doesn't work so well. You need to have play so the disc spins freely but the inside pad needs to be tight so the brakes don't drag as you work the throttle.
I guess spreader springs don't work between the plates?
__________________
Kyosho, Mugen Seiki, Maxy's Fuel, KO Propo
O.S., Ninja JX, Novarossi, RMV
ezveedub is offline   Reply With Quote
Old 04-29-2008, 09:55 PM   #1057
Tech Master
 
TonysScrews's Avatar
 
Join Date: Jan 2006
Location: Central NJ
Posts: 1,660
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by ezveedub View Post
I guess spreader springs don't work between the plates?
Some guys use the small springs but I never really cared for them. With the o-ring, one caliper is tight while the other is loose. I like having the outside caliper free. I adjust the brake screw so I have enough play that the disc is free and the brakes don't drag. With the spring there is a load on both calipers so neither is free. The o-rings will last an entire season too .
__________________
Tony P.

Tonys Screws LLC
http://www.tonysscrews.com
High Grade Alloy Steel Screws, Screw Kits and Mugen Parts
TonysScrews is offline   Reply With Quote
Old 04-29-2008, 09:57 PM   #1058
Tech Master
 
TonysScrews's Avatar
 
Join Date: Jan 2006
Location: Central NJ
Posts: 1,660
Trader Rating: 13 (100%+)
Default

Here is an old pic I have from Ralph of his center diff with the o-rings wrapped around the center diff carrier for anyone reading this that needs to see a picture.

__________________
Tony P.

Tonys Screws LLC
http://www.tonysscrews.com
High Grade Alloy Steel Screws, Screw Kits and Mugen Parts
TonysScrews is offline   Reply With Quote
Old 04-30-2008, 12:35 AM   #1059
Tech Elite
 
ezveedub's Avatar
 
Join Date: Aug 2004
Location: Fort Lauderdale, FL
Posts: 2,411
Trader Rating: 14 (100%+)
Send a message via AIM to ezveedub Send a message via Yahoo to ezveedub
Default

I never seemed to have any issues with the stock brakes, both buggy or truggy. My truggy will pull an "end-o" at the end of the straight you get on the brakes fully. Never faded either. Then again, I don't use the Mugen linkages or the fuel tubes on the brake rods either.
__________________
Kyosho, Mugen Seiki, Maxy's Fuel, KO Propo
O.S., Ninja JX, Novarossi, RMV
ezveedub is offline   Reply With Quote
Old 05-01-2008, 04:03 AM   #1060
Tech Addict
 
slow coach's Avatar
 
Join Date: Oct 2003
Location: guernsey C.I.
Posts: 626
Default

Tony are the electrical terminals to stop the brakes coming back to far and binding on throttle
__________________
Kyosho MP9TKI2 soon to be TKI3, Novarossi, SMD, GM Racing, www.grccc.org
a great wife and lovely kids
what more can you ask for
a win on the lottery :D
slow coach is offline   Reply With Quote
Old 05-01-2008, 07:12 AM   #1061
Tech Lord
 
Integra's Avatar
 
Join Date: Dec 2006
Posts: 12,482
Trader Rating: 8 (100%+)
Send a message via MSN to Integra
Default

Quote:
Originally Posted by slow coach View Post
Tony are the electrical terminals to stop the brakes coming back to far and binding on throttle


GOOD eye....i didnt see that till u mentioned it and that appears what he's done.....Looks pretty trick tony...what's up with the ball style chassy braces. ?
__________________
TNS Driver - Radio Post - Blue Groove Apparel - Team Panther - Hitec - Losi - W.E.D. Paint - Clockwork Fuel - Competition Heat - SUMO Racing - Tekin - Team Terribles - M2C Racing - Matrix Concepts - Kal Gard - BuKu Power - DE Racing -
Integra is offline   Reply With Quote
Old 05-01-2008, 08:31 AM   #1062
Tech Elite
 
revo61's Avatar
 
Join Date: Jun 2006
Location: In the dirty south
Posts: 2,877
Trader Rating: 18 (95%+)
Default

What are you guys using for throttle return springs?
revo61 is offline   Reply With Quote
Old 05-01-2008, 01:13 PM   #1063
Tech Lord
 
Integra's Avatar
 
Join Date: Dec 2006
Posts: 12,482
Trader Rating: 8 (100%+)
Send a message via MSN to Integra
Default

Quote:
Originally Posted by revo61 View Post
What are you guys using for throttle return springs?
a throttle return Band....u can get em at like walmart or w/e in the Hair n accessories isle....they come in a couple differnt sizes...and if u OVERSTRETCH them....they will have a little less pull.
__________________
TNS Driver - Radio Post - Blue Groove Apparel - Team Panther - Hitec - Losi - W.E.D. Paint - Clockwork Fuel - Competition Heat - SUMO Racing - Tekin - Team Terribles - M2C Racing - Matrix Concepts - Kal Gard - BuKu Power - DE Racing -
Integra is offline   Reply With Quote
Old 05-01-2008, 01:18 PM   #1064
Tech Lord
 
Integra's Avatar
 
Join Date: Dec 2006
Posts: 12,482
Trader Rating: 8 (100%+)
Send a message via MSN to Integra
Default

__________________
TNS Driver - Radio Post - Blue Groove Apparel - Team Panther - Hitec - Losi - W.E.D. Paint - Clockwork Fuel - Competition Heat - SUMO Racing - Tekin - Team Terribles - M2C Racing - Matrix Concepts - Kal Gard - BuKu Power - DE Racing -
Integra is offline   Reply With Quote
Old 05-01-2008, 01:50 PM   #1065
Tech Elite
 
revo61's Avatar
 
Join Date: Jun 2006
Location: In the dirty south
Posts: 2,877
Trader Rating: 18 (95%+)
Default

Do you have a picture of this?
revo61 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
MUGEN MBX5R and (THREE) MUGEN MBX5T PROSPECS F/S or F/T nobike R/C Items: For Sale/Trade 11 02-12-2008 11:49 AM
MUGEN MBX5R F/S tshaec5r R/C Items: For Sale/Trade 25 01-14-2008 07:17 AM
MUGEN MBX5R/MUGEN MBX5T PROSPEC/TRAXXAS RACE REVO Jason Halvorson R/C Items: For Sale/Trade 14 01-12-2008 09:32 AM
Mugen MBX5R Brand New Mugen Hops Ups and More bretzkej R/C Items: For Sale/Trade 8 05-27-2007 05:57 AM
USA's Most Wanted FOR SALE Mugen MBX5R,Losi 8 comp, and Mugen MBX5T Prospec Truggy nobike R/C Items: For Sale/Trade 69 04-28-2007 06:45 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 06:19 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net