Go Back  R/C Tech Forums > General Forums > Electric On-Road
locking a F1 diff >

locking a F1 diff

Like Tree11Likes

locking a F1 diff

Old 05-27-2018, 12:38 PM
  #1  
Tech Apprentice
Thread Starter
 
Join Date: Jan 2015
Location: Richmond Tx
Posts: 76
Default locking a F1 diff

Hows the best and or easiest way to lock a diff up for black carpet?
I'm building a Serpent F110 SF3
Looking for pics on how to mount or pin the spur gear, and right side hub together to the left diff half / axle shaft.
Not worried about it not be reversible as I'll probably only run indoor carpet with this car
brewkett is offline  
Old 05-27-2018, 12:49 PM
  #2  
Dan
Tech Champion
iTrader: (67)
 
Dan's Avatar
 
Join Date: Oct 2001
Posts: 5,518
Trader Rating: 67 (100%+)
Default

Easiest and best way is to buy a spool from High velocity RC. Check their FB page. It will be the lightest and cleanest setup. You'll need another clamping hub too. Not the cheapest setup but meets your criteria of easy/best.
Dan is offline  
Old 05-27-2018, 01:00 PM
  #3  
Tech Apprentice
 
Toyota Tom's Avatar
 
Join Date: Aug 2015
Posts: 63
Default

Tamiya part 54424, 3x3mm bushings - for ball diffs. Just replace your diff balls with these. Works perfect. Couldn't find these in the US.
Bought on Ebay, came from Japan.
SteveM and Tim Neja like this.
Toyota Tom is offline  
Old 05-27-2018, 08:36 PM
  #4  
Tech Elite
iTrader: (63)
 
theproffesor's Avatar
 
Join Date: Feb 2005
Location: Lugoff SC
Posts: 3,355
Trader Rating: 63 (100%+)
Default

Could someone explain how locking the diff in a 2wd car makes it handle better? I don’t understand this?
theproffesor is offline  
Old 05-27-2018, 09:09 PM
  #5  
Tech Addict
iTrader: (5)
 
Join Date: Dec 2012
Location: Montreal, Canada
Posts: 559
Trader Rating: 5 (86%+)
Default

Traxxas slipper friction pegs Part # TRA4685
Quinny45 is offline  
Old 05-27-2018, 09:23 PM
  #6  
Tech Regular
 
JeffofSpace's Avatar
 
Join Date: Jun 2016
Location: Seattle
Posts: 406
Default

Originally Posted by theproffesor View Post
Could someone explain how locking the diff in a 2wd car makes it handle better? I don’t understand this?
If traction is super high, in a fast corner the inner wheel lifts off the ground slightly while the outer wheel maintains contact. So, no diff means power directly on the gripping rear wheel without any differential action thus maintaining full available power. Generally, from what I understand, the rest of the car needs to have a soft setup to maintain stability on straights and slower turns.

Last edited by JeffofSpace; 05-27-2018 at 09:24 PM. Reason: Spelling
JeffofSpace is offline  
Old 05-27-2018, 10:02 PM
  #7  
Tech Regular
 
DaSilva3525's Avatar
 
Join Date: Jun 2013
Posts: 483
Default

I drove someone else's Xray F1 a week ago and I drove it pretty hard (had lots of steering and was diffing out or lifting slightly like mentioned) but still was planted and the best f1 I have driven as far as it can actually steering when I want. I asked him If I could try a locked diff and I went 2-3 tenths constantly quicker after the change It was perfect for me be he couldn't drive it with out some set up changes after. Def give it a shot F1 crowd, on the black carpet and see if it's for you.
iTz Nicholas72 likes this.

Last edited by DaSilva3525; 05-27-2018 at 10:15 PM.
DaSilva3525 is offline  
Old 05-28-2018, 01:07 AM
  #8  
Tech Master
iTrader: (39)
 
Join Date: Jul 2003
Location: El Pueblo de Nuestra Señora La Reina de Los Ángeles del Río de Porciúncula, California, Unites States of America
Posts: 1,154
Trader Rating: 39 (100%+)
Default

Would this be any good on asphalt?

Originally Posted by DaSilva3525 View Post
I drove someone else's Xray F1 a week ago and I drove it pretty hard (had lots of steering and was diffing out or lifting slightly like mentioned) but still was planted and the best f1 I have driven as far as it can actually steering when I want. I asked him If I could try a locked diff and I went 2-3 tenths constantly quicker after the change It was perfect for me be he couldn't drive it with out some set up changes after. Def give it a shot F1 crowd, on the black carpet and see if it's for you.
lagcisco is offline  
Old 05-28-2018, 01:23 PM
  #9  
Tech Apprentice
 
Toyota Tom's Avatar
 
Join Date: Aug 2015
Posts: 63
Default

Don't think the car handles better, just a little different. I don't run on asphalt, but on a high traction surface like CRC black carpet, the car comes out of the corner harder. And you never have to mess with the diff again!
Toyota Tom is offline  
Old 05-28-2018, 02:42 PM
  #10  
Dan
Tech Champion
iTrader: (67)
 
Dan's Avatar
 
Join Date: Oct 2001
Posts: 5,518
Trader Rating: 67 (100%+)
Default

Stick to the ball diff for asphalt.
lagcisco likes this.
Dan is offline  
Old 06-01-2018, 01:13 PM
  #11  
Tech Regular
iTrader: (9)
 
RonF's Avatar
 
Join Date: Aug 2009
Location: Puyallup, WA
Posts: 278
Trader Rating: 9 (100%+)
Default

Originally Posted by Quinny45 View Post
Traxxas slipper friction pegs Part # TRA4685
I finally remembered to pick up this part at the hobby shop. What is the setup to use this in the differential? IE, replace all or some of the balls with the pegs? This will be in a F1R3.
RonF is offline  
Old 06-01-2018, 08:07 PM
  #12  
Tech Addict
iTrader: (5)
 
Join Date: Dec 2012
Location: Montreal, Canada
Posts: 559
Trader Rating: 5 (86%+)
Default

you need to cut the peg the same seize of the balls and if the inner ring of the spurgear touch the diff plate put it in the center. you play with the number of peg if you want just harder than a ball diff or nearly locked

and if only one ring of the spur touch the diff plate you need to remplace the balls by peg ( dont put grease the peg will slip ! )
Quinny45 is offline  
Old 06-05-2018, 10:04 AM
  #13  
Tech Elite
iTrader: (65)
 
Join Date: Dec 2011
Location: Raleigh, North Carolina
Posts: 2,937
Trader Rating: 65 (100%+)
Default

Pegs are still not as good as a locked diff.
Just tap the inner diff ring pinned to the axle for 3mm and then screw the spur Gear to it.
Might have to unpin it and flip it to get it right but it’s not hard.
Antimullet is offline  
Old 06-05-2018, 12:01 PM
  #14  
Tech Regular
 
Join Date: Jan 2003
Location: Montréal, Qc
Posts: 304
Default

A quick and easy way to do it is to remove all balls, then put some 3M double sided tape on the both diff rings and tighten it down. May not be as light as other solutions, but it works, it's quick to perform and 100% reversible.

Martin Paradis
iTz Nicholas72 likes this.
rhodopsine is offline  
Old 06-05-2018, 12:46 PM
  #15  
Tech Champion
iTrader: (22)
 
robk's Avatar
 
Join Date: Aug 2001
Location: Macho Business Donkey Wrestler
Posts: 8,007
Trader Rating: 22 (100%+)
Default

Originally Posted by Antimullet View Post
Pegs are still not as good as a locked diff.
Just tap the inner diff ring pinned to the axle for 3mm and then screw the spur Gear to it.
Might have to unpin it and flip it to get it right but it’s not hard.
Ths point of the pegs are not necessarily full lock. I like the fact that i can back off 100% lock and get a "heavy" diff if traction is not conducive to a full spool. Many club races are like this.

Horses for courses......
robk is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.