Bill Verburg

yes, I corrected it RoW M030 150/300

JIC 7/10 is ~60% stiffer than RS in front & ~23% stiffer in back

JIC 8/12 is 82%/47% stiffer than RS

JIC 9/14 is 105%/72% stiffer than RS

all the JIC setups are setup w/ ~32% more front than RS, they will tend to understeer more

jaholmes

Bill,
So to dial out some of the understeer can't you just get the closest JIC spring rates to OE Springs. I't won't be exact but close.

I'm sure this has been beat to death, but where to do get RS Shocks and Springs from. Are these good 'ol bilstein shocks.

Stealth 993

You just need a 2.5in spring, if you know the length, I can get you any spring you want, they are cheap.

If it's bouncy on soft, most of that would be due to the spring rate, it's over powering the dampening. With a softer spring, you can run the softer setting & get a better ride.

Stealth 993

To dial out some understeer, you just increase the rear dampening rate a bit, or use a stiffer spring it the rear.

RS shocks are revalved Bilsteins, there are a few places that sell them, I just saw a set of fronts on eBay. RS stuff is going to be stiff, don't forget it was tuned for a car that is a 400lbs lighter.

Bill Verburg

Closest to RS in JIC would be either 4 or 5 in front & 8 in back, probably 5 & 8 would be closest

jaholmes

With this low spring rate will this beat the hell out of the shock itself. I'm thinking the shocks would need to be re-valved to go that low.