5LikesSC10 4x4 Thread
04-10-2012 | 06:44 PM
This affects handling on ruff tracks, but how?
On a slippery track, having more weight bias forward will help. What would also help is a power distribution system that doesn't slip or pick a favorite side to bias to (aka the decoupled slipper)
My new theroy (I haven't tried it yet/again) is to recouple the slipper when grip is low. My VTA sedan has a belt and two diffs, handles fine and doesn't torque bias to one side or the other, so why can't my short course truck?
Say I got a SCTE what differences would I notice besides flight?
The SC10 flies fine with a stiffer spring.
How much weight needs to be added to the front to balance it out?
But it's not that simple, you can't just add 200 grams and call it good, because keeping weight near the chassis center of gravity is also important. When AE designed the truck, they put the motor in the back. When Losi designed the truck, they put the motor in the middle. Plus, it has a center gear diff that is way better at biasing power front to rear in a lower grip situation.
04-10-2012 | 07:09 PM
Tech Rookie
Joined: Mar 2012
Posts: 13
yea i was actually just looking at those, i know there is obviously a difference in all of them, but im just an amatuer driver, not really planning on doing much racing, so should i just go for one of the cheaper, non specific ones?
04-10-2012 | 08:11 PM
Tech Rookie
Joined: Jan 2012
Posts: 19
I just finished putting together my FT kit I picked up on the weekend. I have added no mods to it, kept it stock, even down to the setup and will use my close to FT RTR as a test bed for any mods first. I have the centre diff but running on a carpet only track makes putting it in not the best idea. Don't get me wrong, I have two trucks to try it out on and if I get out to the outdoor track at Average Joe's, it will be a great mod to install before that track. I had one missing aluminium screw (there were steel ones where ever an aluminium one went) and a seriously leaking bottle of 5K diff fluid, so overall not bad. The build went completely uneventful as I already had taken the RTR down a few times to check and rebuild the diffs (worn outdrives only), so there were no surprises. I kept with the Tekin Pro 4 4000K but this time, went saddles and RX8. In my RTR, I had the LRP TC Spec and stick pack. Both are balanced side to side but the saddle pack has a bit more up front bias. Once I get some scales, I will be able to set things up a bit more professionally rather than the methods I am currently using (not very accurate). Some day, I will get some pics of my pair of 4x4's and post them. My two bodies are well beaten and bruised so they look very scale, in fact, better than most full sized SC trucks after a race, lol. Thanks for the many tips and tricks. Take care.
Don
Don
04-11-2012 | 02:00 AM
Tech Regular
Joined: Jul 2011
Posts: 275
I remember someone here using breadboard as a slipper pad.. did that actually work out? I am waiting for the VTS Slipper, but that'll take some weeks to get here, so I figured I could give that a try in the meantime if it works.
04-11-2012 | 04:18 AM
Quote:
Originally Posted by Evil Genius jr. View Post
A couple more questions about the handling/design of this car.
So the weight is biased to the rear.
Right.
Quote:
This affects handling on ruff tracks, but how?
On a rough track? The weight distribution isn't an advantage or a disadvantage.
On a slippery track, having more weight bias forward will help. What would also help is a power distribution system that doesn't slip or pick a favorite side to bias to (aka the decoupled slipper)
My new theroy (I haven't tried it yet/again) is to recouple the slipper when grip is low. My VTA sedan has a belt and two diffs, handles fine and doesn't torque bias to one side or the other, so why can't my short course truck?
Quote:
Say I got a SCTE what differences would I notice besides flight?
The parts quality is absolute junk, and you'll be constantly wrenching fixing CVD's, outdrives, bearings, ect.
The SC10 flies fine with a stiffer spring.
Quote:
How much weight needs to be added to the front to balance it out?
When I was weighing trucks, user Oasis SCTE had the exact same rear wheel weight as my SC10 4x4, but the front was something like 100 grams heavier per wheel.
But it's not that simple, you can't just add 200 grams and call it good, because keeping weight near the chassis center of gravity is also important. When AE designed the truck, they put the motor in the back. When Losi designed the truck, they put the motor in the middle. Plus, it has a center gear diff that is way better at biasing power front to rear in a lower grip situation.
Originally Posted by Evil Genius jr. View Post
A couple more questions about the handling/design of this car.
So the weight is biased to the rear.
Right.
Quote:
This affects handling on ruff tracks, but how?
On a rough track? The weight distribution isn't an advantage or a disadvantage.
On a slippery track, having more weight bias forward will help. What would also help is a power distribution system that doesn't slip or pick a favorite side to bias to (aka the decoupled slipper)
My new theroy (I haven't tried it yet/again) is to recouple the slipper when grip is low. My VTA sedan has a belt and two diffs, handles fine and doesn't torque bias to one side or the other, so why can't my short course truck?
Quote:
Say I got a SCTE what differences would I notice besides flight?
The parts quality is absolute junk, and you'll be constantly wrenching fixing CVD's, outdrives, bearings, ect.
The SC10 flies fine with a stiffer spring.
Quote:
How much weight needs to be added to the front to balance it out?
When I was weighing trucks, user Oasis SCTE had the exact same rear wheel weight as my SC10 4x4, but the front was something like 100 grams heavier per wheel.
But it's not that simple, you can't just add 200 grams and call it good, because keeping weight near the chassis center of gravity is also important. When AE designed the truck, they put the motor in the back. When Losi designed the truck, they put the motor in the middle. Plus, it has a center gear diff that is way better at biasing power front to rear in a lower grip situation.
Last edited by Evil Genius jr.; 04-11-2012 at 07:08 AM.
04-11-2012 | 09:08 AM
Tech Legend
Joined: Aug 2001
Posts: 22,595
From: TRCR Modified Driver
I don't agree with that , think its easy to if we just treat each other with respect ....
Last night I pull my old arms from the bag .
Scott & my other team mates examine carefully..
They were warped & twisted like many have posted about..
Guess indoors is as ruff & tuff as outdoors as CraigsMBA arms looked like new compared to my old arms...
I will check out the Rpm arms next & report back if there any better ..
04-11-2012 | 09:25 AM
BTW, I wrote the arms would last longer indoor because the speeds are lower. Either way they are going to warp; the only questions are 1) does it happen or 2) how fast, or 3) is there anything we can do to slow it down?