Turn in Concepts rear trailing arm bushing
Posted: Tue Feb 01, 2011 7:15 am
Last week I got a test set of TiC's new bushings and put them in.
They go in the rear upright where the trailing arm attaches. Here's one compared to the stock bushing:
A piece of pipe, a nut and bolt and some washers made it pretty easy to remove the stock ones:
Then the new ones just press in by hand:
So here's the cool thing I've noticed: there's a pretty good reduction in understeer. I suppose part of this is due to a slight reduction in dynamic toe changes. The other reason is that I have, in effect, increased the total stiffness of the rear suspension. This means the chassis transfers load to the outside rear tire more efficiently.
I wasn't really expecting to notice a big difference, and wasn't sure if I was just imagining things. Then I went around a couple more onramps and found myself having to take out steering angle a few times where I normally would just be riding the edge of understeer. I really need to get this thing out of town somewhere to see how it feels. Another thing I'm noticing is a better overall steering precision out of the whole car.
So now I have to order the rest of the set- lateral link bushings and the front trailing arm bushings. If anyone else is interested in this new bushing option we're doing a group buy on the nasioc and iwsti forums.
They go in the rear upright where the trailing arm attaches. Here's one compared to the stock bushing:
A piece of pipe, a nut and bolt and some washers made it pretty easy to remove the stock ones:
Then the new ones just press in by hand:
So here's the cool thing I've noticed: there's a pretty good reduction in understeer. I suppose part of this is due to a slight reduction in dynamic toe changes. The other reason is that I have, in effect, increased the total stiffness of the rear suspension. This means the chassis transfers load to the outside rear tire more efficiently.
I wasn't really expecting to notice a big difference, and wasn't sure if I was just imagining things. Then I went around a couple more onramps and found myself having to take out steering angle a few times where I normally would just be riding the edge of understeer. I really need to get this thing out of town somewhere to see how it feels. Another thing I'm noticing is a better overall steering precision out of the whole car.
So now I have to order the rest of the set- lateral link bushings and the front trailing arm bushings. If anyone else is interested in this new bushing option we're doing a group buy on the nasioc and iwsti forums.