Cosmo Racing coilovers installed

[5thhorsemann]

I ordered these some time ago off of ebay, and just got them on the car with new KYB struts 2 weeks ago. (The fronts were installed months ago and I just finished the rears.)

I really like them, they are stiff, but not kidney killers by any stretch. There is almost no body roll any more and the handeling improvements were dramatic.

Installation was a breeze, no sectioning required, and there is no need to remove the lower spring perch unless you have tire interface issues.

I wouldn't recomend them if you are looking to lower the car more than an inch or so, but if you want to have the ability to tweek your ride height slightly, this is a high quality reasonably priced option. I have put a couple hundred miles on the car since the install and am very happy with the overall outcome VS. money spent.

[johnny haywire]

I'd love to see some photos if you have any, sounds like a cool addition to the car.

[theczechone]

yes please share some pictures of your installation. How does the ride comapare to drop springs (eibach, tokico, etc.)?

[5thhorsemann]

I can't speak to the drop springs, never to my knowledge have I driven on them. But these handel nice.

front pic

rear pic

They are very easy to adjust and the fitment is excellent, nice tight tolerances and they wcn be removed in favor of stock springs if you so choose.

[240260280z]

Has anyone tried these on a track car? Are the spring rates and damping suitable for the track?

[5thhorsemann]

Blue, my thinking at the time of purchase was the ability to change the springs out cheaply from Pegasus and other race parts suppliers, if I didn't like the springs in the kit. Fortunately, I'm happy with the spring that came with the kit.

The 5KG front / 6 KG rear rates sounded a bit harsh, not having ANY other Z owners locally to compare ride firmness with it was a roll of the dice, luckily I won. If I wanted to put the car on the track and needed a firmer spring rate, the change would be quick and cheap on the springs. I also think the KYB's are a good match for the springs in the kit, or an even stiffer spring.

I would not recommend these for significant lowering of the car, that would require sectioning of the strut, but you could make this kit work if you know what you are doing and save a bunch of cash over the GC's.

[gira]

I believe the spring rates are published when you buy them, but possibly in a metric format. One thing I noticed in the pictures above regarding the rear spring set up. If this picture was taken with the tire in full droop, I'd say there is a good chance of coil bind. If you are in a corner or just accelerating hard and the coils all touch each other, essentially you have gone to what I call "infinity" spring rate. This will cause massive oversteer or lack of grip.

greg ira

[5thhorsemann]

Car is on the ground, springs are loaded.

[John Coffey]

Has anyone tried these on a track car? Are the spring rates and damping suitable for the track?

You can take a stock 240Z and race it on the track. The stock spring rates and damping are fine for a race track. The real question is whether these springs and the KYB shocks will make you quicker around a race track the the stock springs and shocks? They will certainly not make you any faster then a proper track setup with shortened struts, better shocks then the KYBs, higher spring rates, etc. But they will most likely be better then stock for most folks who occasionally do track days. Except.... those spring rates (279 lb. in. front and 335 lb. in. rear) are way above the rates the KYB shocks will support in rebound. Keep an eye on your shocks and watch for oil leakage and a floaty feeling after bumps. That will tell you the rebound stack has failed.

[AlexS13]

can you post a picture of the car so we can see how the ride height looks?

[MotoManMike]

How much did this set up set you back 5th? I just ordered eibachs and kyb's, and poly bushings for my one project, I havn't installed yet but total thats a $450 set up in itself. I wanted the MSA coilover kit but jees, i'd have to sell a kidney.

Edited August 1, 2012 by MotoManMike
forgot something

[5thhorsemann]

Hey Mike, total cost, off the top of my head, would be $600 to $650 for the coilovers and struts on all 4 corners. I'm going to start adjusting the ride height (lower) this week if I can find the time, the more I drive the car, the more I like this set up.