High end coilover brands with incorrect spring rates?

[ZDan]

Originally Posted by supercharged680

Their setting

F Compression 6
F Rebound 10
R Compression 6
R Rebound 8


My settings

F Compression 1
F Rebound 6
R Compression 2
R Rebound 6

I have had 7 tenths quicker in a mid 1 minute track on my settings.

7 tenths? Consistently? A-B-A testing? Might be good to try "blind" testing also.

The numbers you give are clicks out from all the way in (lower number = stiffer)? If bouncy, try increasing rebound damping and/or maybe decreasing compression damping.
How far are you from bump stops at static ride height?

[Icecreamtruk]

From the video I have to agree with Mike. Very bouncy and pushy car. The bounce does not bother me as much as the understeer, but thats just me. It feels like a high spring rate car honestly. The main difference between this and the car on the SRC is probably the spring rate. I dont think you'll accomplish what you want with those rates. Im not an expert so I would listen to the more experienced people here. I did go from stock, to 6k, to 12k ratings over the course of my car's track life and while they are not the top of the cream, they do their job, and on harsh tracks, its bouncy but its still fast. Check this out at around 1:54, 12k spring rate, RE71R tires and medium aero (full kit, small size-mid size parts):

The car is bouncing because the track has some undulations there but I can still stay on full throttle on corner exit no problem. Furthermore, look at some of the prototypes and GT cars around sebring, they bounce, a lot.

I guess what im trying to say is that its not necessarily super bad that it bounces, in your case it seems a bit excessive yes, but dont try to completely get rid of it, try to make the car feel better/faster, which may mean dealing with some bouncing here and there.

[supercharged680]

Originally Posted by Icecreamtruk

From the video I have to agree with Mike. Very bouncy and pushy car. The bounce does not bother me as much as the understeer, but thats just me. It feels like a high spring rate car honestly. The main difference between this and the car on the SRC is probably the spring rate. I dont think you'll accomplish what you want with those rates. Im not an expert so I would listen to the more experienced people here. I did go from stock, to 6k, to 12k ratings over the course of my car's track life and while they are not the top of the cream, they do their job, and on harsh tracks, its bouncy but its still fast. Check this out at around 1:54, 12k spring rate, RE71R tires and medium aero (full kit, small size-mid size parts):

The car is bouncing because the track has some undulations there but I can still stay on full throttle on corner exit no problem. Furthermore, look at some of the prototypes and GT cars around sebring, they bounce, a lot.

I guess what im trying to say is that its not necessarily super bad that it bounces, in your case it seems a bit excessive yes, but dont try to completely get rid of it, try to make the car feel better/faster, which may mean dealing with some bouncing here and there.

Here is a video of me driving the GT86 CUP car with NT01 and Tein SRC

[M0nk3y]

Assuming you have bumpstops on your shocks?

Have you ever tried zip-tieing your shocks to see how much travel you're getting out of the shock itself?

Honestly, it looks like you're jacking the suspension down with high rebound/low compression setup and you're riding on bumpstops. But without knowing, well it's just a guess. Would explain the sudden change in dynamics as you're literally on bumpstops until the shock "unjacks" itself off of it