Spring rates etc

[Nisse Järnet]

Im about to order the GC coil kit with Koni race and probably camber plates but what spring rates do you guys recomend?

The car will be driven on the street for the most part but is not a daily so i dont care much about comfort, handling is nr 1 prio.

[Mr. Tasty]

im about to order the gc coil kit with koni race and probably camber plates but what spring rates do you guys recomend?

The car will be driven on the street for the most part but is not a daily so i dont care much about comfort, handling is nr 1 prio.

550f/750r

[IronFreak]

550f/750r

[Nisse Järnet]

Ok thanks guys! I dont want the front inner tire to lift during hard cornering :)

[IronFreak]

Ok thanks guys! I dont want the front inner tire to lift during hard cornering :)

Thats what I have, and will have on my Z coupe as well. I would call and double check with Mark at GC or PM him on here "GCMARK". He might have some insight on your setup, being that its an IX that we as coupe owners are missing.

[Nisse Järnet]

Thats what I have, and will have on my Z coupe as well. I would call and double check with Mark at GC or PM him on here "GCMARK". He might have some insight on your setup, being that its an IX that we as coupe owners are missing.

Yeah im talking to him too :)

Is a stiffer front bar the best way to reduce front wheel lift? Or does a stiffer one at the rear help out?

[IronFreak]

Can't answer that. I'm sure the dynamics with the IX suspension is a little different. I know several people around here that don't run a rear bar at all. I think you would control that lift more with a spring then the bar, although it will help. The bar is trying to keep the car level, so if it's doing it job, but the opposite corner spring compresses on a hard turn, the bar will probably create lift......I could be totally wrong but that's how I would see it.

[Nisse Järnet]

Can't answer that. I'm sure the dynamics with the IX suspension is a little different. I know several people around here that don't run a rear bar at all. I think you would control that lift more with a spring then the bar, although it will help. The bar is trying to keep the car level, so if it's doing it job, but the opposite corner spring compresses on a hard turn, the bar will probably create lift......I could be totally wrong but that's how I would see it.

Yeah thats true! So probably springs a bit on the hard side is a good starting point?
Just wonder how thats going to perform on the street thats not as smooth as a track :P
The car would see like 90% street use.

[nando]

I would do 400/600.

Many people responding to this dont have an ix. 550/750 will be really stiff - i had 600/700, it was nice on a track but a bit much to dd. I'd also pair them with konis, if you're shortening the housings (you should), get the race inserts. The ride shoud be pretty decent with lots of travel and good damping.

[Nisse Järnet]

Im not going to daily the car so that's not very important, however it will mostly be used on the street so a too stiff setup may be no good on the bumpy roads? Like loosing traction in corners because its too stiff causing the tire to "bounce off" some small bumps if you know what i mean. Usually the roads are pretty good so it might not be a real problem.

And i also have a little fear of lifting a front inner tire but maybe not on the street :)

Yes i will go with Koni race and shorten the housings.

[nando]

yes.

I wouldn't worry about front innner tires lifting. if that happens it just means you're driving the car properly...

[Nisse Järnet]

The finish ix turbo guy had some problems with the handling when the inner tire lifted. The car started to drift like a rwd and when trying to counter steer it violently changed direction due to the power coming back to the front tires :P
I want to avoid that as much as possible!

[The Dark Side of Will]

Yeah im talking to him too :)

Is a stiffer front bar the best way to reduce front wheel lift? Or does a stiffer one at the rear help out?

A stiff bar will *INCREASE* the tendency to lift the inside tire

[Nisse Järnet]

A stiff bar will *INCREASE* the tendency to lift the inside tire

Yeah i thought a bit more and agree, but what about a stiffer in the rear?

[The Dark Side of Will]

Bars change the car's diagonal dynamic weight distribution.

A stiff rear bar will lighten the inside rear while putting weight on the inside front.

Bars hurt traction at the end of the car they are installed on by increasing the weight split from inner to outer. This reduces the total grip at that end of the car. However, if the car reduces body roll such that a poor suspension design can make better use of the tires, then grip may go up. There are multiple effects at work.

Each bar has an effect on all four wheels, and these effects are additive with the effects of the springs.