01-04-2016, 01:59 PM | #1 |
Rock Crawler Join Date: Dec 2015 Location: Charlotte, NC
Posts: 565
| Torque Twist?
But of a noob here...been scouting out the bomber and watched a lot of videos. It seems like out of the box on 3s the left front wants to come off the ground on any decent acceleration and/or steep crawls. I am assuming this is known as torque twist? How are you guys stopping this from happening especially with the big brushless motors?
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01-04-2016, 02:26 PM | #2 | |
Rock Crawler Join Date: Apr 2006 Location: Folsom, CA
Posts: 620
| Re: Torque Twist? Quote:
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01-04-2016, 02:42 PM | #3 |
I wanna be Dave Join Date: May 2015 Location: Moving
Posts: 2,580
| Re: Torque Twist?
Underdrive rear, 43/13, helped mine a lot and I'm running a Holmes Puller Pro on 3S.
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01-04-2016, 02:53 PM | #4 |
Newbie Join Date: Nov 2015 Location: Okinawa, Japan
Posts: 38
| Re: Torque Twist?
In addition to the above, I added heavier wt shock oil and stiffer springs in the rear as well. Not sure what made the biggest difference because I did it all at the same time. The torque twist and rear body roll isn't bad at all now. I don't even notice it any more, and it certainly doesn't impact my driving.
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01-04-2016, 02:58 PM | #5 |
Rock Crawler Join Date: Jan 2008 Location: P-TOWN
Posts: 748
| Re: Torque Twist?
Suspension set up can also reduce the TT. Thicker oil or stiffer springs on the affected side. I just swapped out my stock shocks for big bores with the stock springs and it reduced it by 75%. Running 30wt in the rear and 15wt in the front. Don't know what wt oil you will need with the stock shocks so you will have to figure that out yourself. Reminds me of the first AX10. That bad boy had mad TT out of the box just like the Bomber. Damn, Smitty beat me to it! |
01-04-2016, 03:13 PM | #6 |
Newbie Join Date: Dec 2015 Location: BelAir
Posts: 1
| Re: Torque Twist?
What brand rear sway bar is everyone running ?
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01-04-2016, 03:25 PM | #7 |
Rock Crawler Join Date: Jan 2008 Location: P-TOWN
Posts: 748
| Re: Torque Twist?
Axial , UCFab or Dlux are the 3 sway bars used that i know of.
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01-04-2016, 03:29 PM | #8 |
Rock Crawler Join Date: Dec 2015 Location: Charlotte, NC
Posts: 565
| Re: Torque Twist?
Thanks for the help!
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01-04-2016, 05:53 PM | #9 |
Rock Crawler Join Date: Dec 2015 Location: Charlotte, NC
Posts: 565
| Re: Torque Twist?
Does adding the sway bar limit the articulation?
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01-04-2016, 07:35 PM | #10 |
I wanna be Dave Join Date: Jun 2013 Location: Ramona, CA
Posts: 2,178
| Re: Torque Twist? |
01-05-2016, 07:07 AM | #11 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: Torque Twist? |
01-05-2016, 08:59 AM | #12 |
Newbie Join Date: Sep 2012 Location: Soda Springs
Posts: 13
| Re: Torque Twist? |
01-05-2016, 09:01 AM | #13 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: Torque Twist?
Front and back.
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01-05-2016, 11:09 AM | #14 | |
Pebble Pounder Join Date: Nov 2015 Location: Bay Area
Posts: 196
| Re: Torque Twist? Quote:
I agree on leaving springs and oil alone for this problem as they will impact performance of normal driving. | |
01-05-2016, 11:11 AM | #15 |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: Torque Twist? Under Drive.
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01-05-2016, 11:49 AM | #16 |
Quarry Creeper Join Date: Dec 2009 Location: Cape Cod
Posts: 243
| Re: Torque Twist? There are other threads recommending UD gears in the rear and standard gears (or OD) gears up front. I purchased one set of UD gears planning on installing them in the rear only to start. Not to beat a dead horse, but why UR in both vs UD rear and standard front? I know that the rear tires will drag slightly when going slower than the front, but others advocate UD rear for better crawling? Thanks |
01-05-2016, 11:55 AM | #17 |
RCC Addict Join Date: Aug 2013 Location: Missoula
Posts: 1,346
| Re: Torque Twist?
UD rear for crawling. The Bomber isn't a crawler.
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01-05-2016, 12:00 PM | #18 |
I wanna be Dave Join Date: May 2015 Location: Moving
Posts: 2,580
| Re: Torque Twist?
One of mine is |
01-05-2016, 12:06 PM | #19 | |
Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
| Re: Torque Twist? Quote:
Splitting the gearing is a great way to keep the front planted, but only when you've got the traction to do so. I ran my comp rig with OD/UD and loved it. On everything else I prefer UD/UD. You'll lose a tiny bit of speed (easily made up with a pinion swap, more voltage, or faster motor), but gain a big reduction in TT, plus you don't have the added drag on the motor and drivetrain. | |
01-05-2016, 01:04 PM | #20 |
SuperShafty.com Join Date: Jan 2008 Location: Visalia CA
Posts: 2,902
| Re: Torque Twist?
sway bar, UD done. all thats needed. |
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