Spring Rates

[rayalexjr]

So im in the process of some custom ultra low coilovers being built and was curious to know what spring rates people are running? I have an s13 with an sr20 and full interior. Plan is to run balls to the ground on 19x11 all around... thanks in advance.

[zooopreme]

12/10 would've been fine but since ride quality and any type of performance benefits from a coilover system have been completely disregarded, 18kg up front and depending how you're tucking wheel, you'll want either 15kg or 14kg or if you want to keep it within 2kg's, go with 16kg.

I hate to burst your bubble but you don't need super low coilovers to tuck 19x11's on a S-Chassis. It's just not possible on a S13. Unless you're running aero that sits closer to the ground, you will never see your car being low.

I would suggest downsizing to 18's at the very least. You can easily tuck and still be low with 18's. Camber, tubs, and a big ass hammer will help you find what you seek.

[oni jake]

Holy shit, you just suggested 18kg springs for the front... You could bounce to the moon with that much tension.


Lets talk about the car's purpose before suggesting spring rates.

[[email protected]]

If he's going "ultra low" he needs a corresponding increase in spring rate to reduce the travel... if you want to remap 7" of travel into 1"... 18k might not be far off

[zooopreme]

Isn't a bit obvious? The car isn't going to be used for any form of racing.

326 Power, Nagahama's JZZ30, etc. run high spring rates. Not saying it's practical for all uses but if your plan is to have the slammed look on 19's (of all sizes), you'll need stiff springs to make sure the tires don't smack the inner fender. 18's on a S13 is already pushing it when going for the slammed look. If you were reading and understanding, I was pointing towards a 12/10 kg set up since it's more than enough but those typically work with people that run smaller sized wheels that actually fit on the S-Chassis.

Plus this guy is having them "custom built" which leads me to believe that whomever is doing the work will be valving these to match the stiff springs. It's not like taking a set of coilovers built for 12/10kg spring rates and putting stiffer springs on them.

[rayalexjr]

Yes no form of racing or drifting at all, driving around town and to shows but not wanting a lot of wheel travel since im going to be extremely low... and yes they are revalving according to which springs I choose...

[codyace]

sell it, and get a passat.