So I've got RK sport coilovers on Koni yellows. I purchased the OEM solid rear mount and quickly ran into a problem.
The spring was not captive at full droop, or even partial droop. So, even over mild bumps I'd hear an annoying rattle in the back, and since my perches were already at the top I had to come up with a solution.
HELPER SPRINGS!
These bastards are fully compressed once on the car, so they don't affect the suspension's dynamics, but what they do do is keep the vehicle from 'clunking' when you go over bumps, as the spring re-seats on the mount.
The effect:
I was VERY happy with the outcome. I paid $120 to buy these out of the states, I think you americans are looking at $80 for a pair, maybe less.
The road from my work home is terrible, riddled with potholes and bumps, normally it's a nonstop rattle-fest, but tonight I didn't hear ANYTHING. Literally ANYTHING.
The only noise I get is when going over very large holes >4" deep or very large bumps (speed bumps at higher speeds). Obviously the only way I'll fix that is with longer springs or raising the perch somehow.
umm arent RK Sports supposed to come with helper springs to start with?
My car may run 18s, but I can do your taxes in 10 seconds flat.
JBO lube - they would never have enough in stock and we'd never see RodimusPrime again
and arnt RK sports just ground controls with eibach springs? your set up looks just like mine minus the helper springs
RKsport ARE just GCs. I had no idea they were supposed to come with helper springs.......... Maybe I should raise some hell with the person who sold them to me.
i thinks rksport's full coilovers came with the helper springs. not the rebranded gc setup.
No issues with slippage. The tube/perch on the solid mount keeps the helper spring on straight while the perch at the bottom, in conjunction with the almost entirely verticle travel of the strut keeps the actual spring in line.
I actually shelled out the cash for the 18DS100's, these are stacked spring dividers, but they just wouldn't work with the helper springs compressing all the way down on the mount. If the helper springs hung about 1/2" below the mount fully compressed, I could have.
I'm still thinking of buying some low spring rate springs from Hyperco yet, because I'm going to need some extra height come winter, when I really won't care how well it handles as much as I will care about not snow-plowing everywhere. In which case, that divider will come in very handy.
For argument's sake:
These are the 18DS100s. As you can see from the pic I posted just before, these would contact the tube/perch on the solid mount (which is the same size as these tubes) before the helper spring had fully compressed, causing a lot of racket everytime the spring was extended. How do I know this? Cause I tried it first, against my better judgement.
I have the GC setup on Koni yellows and the OEM solid mounts, but I'm not having any noise issues in the rear, but like you my perch is set as high as it goes. And with another 4+ inches of drop available I could pretty much sit the chasis down on the rear tires, but that wouldn't be practical now would it. So I was thinking about some spring spacers just to give back some practical adjustability. Not to threadjack, I thought it was related, but what do you guys think about something like this?
http://hoerr-racing-products.amazonwebstore.com/Genesis-2.5-x-1-Spring-Spacer/M/B000W7IF1W.htm
Ben992200 wrote:And, I think I just found the type of spring guide you need on that same site.
Cool!, I might just have to pick those up for safety's sake, although they say 2.5", I wonder if that's the internal diameter. I'll probably call em.
Also for those spring spacers, goddamn man. I swear I searched for a straight month for exactly those things! I don't see any reason they wouldn't work. Anyone?
I'm a damn impulse shopper. Bought the guides and the 2" spacers.
Yeah, on the genesis website they actually describe it as "intended for the hypercoils helper springs"
