Traction Rolling - how to solve it
02-11-2014, 08:58 AM
#121
I was having traction rolling issues a day yesterday. I switched to stiffer swaybars on both ends and it made my issue worse. I increased droop (less downtravel) and it made it worse again. I was rolling even with barely any traction compound. I did notice I had a bit of a tweak issue going on so I am going to do a ground up rebuild on a tweak board and see if that helps some. But I know it wont get rid of the roll issue. Glad I wrote down a previous set-up that worked, but was a little loose. Go back to what I know works
02-11-2014, 09:21 AM
#122
It should be: no swaybars + less droop + softer springs + wider track width + gluing the tire sidewalls....etc....
02-11-2014, 10:27 AM
#123
Tech Adept
02-11-2014, 10:31 AM
#124
Give post #1 a read and try some of the items talked about in Rear Roll Center section.
http://www.rctech.net/forum/electric...ll-center.html
02-11-2014, 01:01 PM
#125
Tech Fanatic
Thread Starter
Hey Martin, I have a question about what sweep does? What does it do haha... and how come its not mentioned in your chassis settings explained portion of your app?
On another note you mention the angle of the camber link, and how the more it leans downward on the inside the more camber gain you have. Which is also roll center, say you want more steering, you want to adjust this by more camber gain, or raising your front roll center on the shock tower... a problem then occurs yes? you cannot raise the roll center on the tower and increase camber gain is that correct?
On another note you mention the angle of the camber link, and how the more it leans downward on the inside the more camber gain you have. Which is also roll center, say you want more steering, you want to adjust this by more camber gain, or raising your front roll center on the shock tower... a problem then occurs yes? you cannot raise the roll center on the tower and increase camber gain is that correct?
re: camber gain. When you raise the front roll center you are lowering the inboard connection point of the upper link, not raising it.
I was having traction rolling issues a day yesterday. I switched to stiffer swaybars on both ends and it made my issue worse. I increased droop (less downtravel) and it made it worse again. I was rolling even with barely any traction compound. I did notice I had a bit of a tweak issue going on so I am going to do a ground up rebuild on a tweak board and see if that helps some. But I know it wont get rid of the roll issue. Glad I wrote down a previous set-up that worked, but was a little loose. Go back to what I know works
- increase rear toe
- raise rear roll center
Often when you have a high front roll center and you are running a spool you can get a huge snap oversteer coming out of the corner and a push into the corner.
02-11-2014, 01:05 PM
#126
Tech Fanatic
Thread Starter
David - swaybars when too stiff can cause the car to flip more easily because they jack the car up and essentially pole vault your car over the outside tire.
02-11-2014, 02:48 PM
#127
i bought my copy back in 2002(i think it was around that year) when it first came out,after 10 yrs away ive reverted back to it,glad to see you on here martin,your advice is most helpfull
i had the inner camberlinks and roll center back to front,i thought adding more shims reduced roll,no wonder i have been struggling ,now i better understand what my car has been doing doh
Last edited by chasingthepack; 02-11-2014 at 03:50 PM.
02-11-2014, 07:37 PM
#128
Hello Martin.
I purchased your app a couple days ago, and I was reading up on wheel load transfer.
You mention (correct me if I'm wrong) the larger the difference between front R and L wheel loads will result in poor handling. i.e lack of steering.
How can you minimize this wheel load difference? I don't have the app in front of me at this moment.
Furthermore, I am also using another setup program that illustrates wheel loads going into a corner. I noticed if I go up one spring rate it will help reduce the difference between front R and L wheel loads. Now, if I go any higher with the spring rate it becomes worse, and if I go any soft it does the same.
Why is that?
I purchased your app a couple days ago, and I was reading up on wheel load transfer.
You mention (correct me if I'm wrong) the larger the difference between front R and L wheel loads will result in poor handling. i.e lack of steering.
How can you minimize this wheel load difference? I don't have the app in front of me at this moment.
Furthermore, I am also using another setup program that illustrates wheel loads going into a corner. I noticed if I go up one spring rate it will help reduce the difference between front R and L wheel loads. Now, if I go any higher with the spring rate it becomes worse, and if I go any soft it does the same.
Why is that?
02-11-2014, 08:06 PM
#129
i also just purchased the app but have not read into it too much. we have little orange dots all over the track. my car likes to roll if i even just graze one. drives me nuts. my car is so on the edge and it loves to roll. going to read into it a bunch and see if i can cure the issue.
02-11-2014, 08:12 PM
#130
i also just purchased the app but have not read into it too much. we have little orange dots all over the track. my car likes to roll if i even just graze one. drives me nuts. my car is so on the edge and it loves to roll. going to read into it a bunch and see if i can cure the issue.
02-11-2014, 08:39 PM
#131
no not plow disks. these are like 5" across. plastic maybe 1/2" height. i touch em and im done. anything to upset the car and over it goes. i see other guys just brush them like its nuthin. like half the car width like a breese. mine even slightly touches them whilst cornering and over it goes. i got something wrong and i have not figured it out yet. ill find the issue.
02-12-2014, 08:53 AM
#132
no not plow disks. these are like 5" across. plastic maybe 1/2" height. i touch em and im done. anything to upset the car and over it goes. i see other guys just brush them like its nuthin. like half the car width like a breese. mine even slightly touches them whilst cornering and over it goes. i got something wrong and i have not figured it out yet. ill find the issue.
lighter spring rate
we have a TON of real dots on our carpet track. i go for decreased dampening first...
02-12-2014, 09:36 AM
#133
Where do you race ? Cause we have a ton of dots. I race with seattle area racers at the comunity center/ hangar30
