I just finish installing my JIC FLT-A2 today, it the 10kg f and 12kg r set up. After I drop the car i took it for a spin, the rear suspension was making alot of noise every time i hit a bump. Am I forgetting something here? Has anyone try this set up before? Please help...if my girl friend hear all that noise when she ride in my car, im gonna have to take it off.

 

hi, had the same problem at first too. it is the rear spring moving in the cup. what i did is when i put the metal plate in the upper part of the mount i spreaded out the prongs and added some double sided tape so that the metal mount is more snug fit. mines was making the same noise everytime i hit a bump. the spring is moving around the mount. hope this helps.

 

Thanks for the help. But my didnt come with any metal plate that sit on top of the rear spring. It came with a rubber mounts. What a prongs? So is the spring moving on the top, or is it moving around the spring purge?

 

i am about to buy the JIC's. were you able to fix the problem that you are having? also how is the ride the the JIC suspension set-up?

 

Heres what Im going to do. I dunno if it will work but this is my idea. Im going to cut the rubber that fits into the top to fit the spring.

 

I would suggest that you guys get a qualified suspension tuner to tune your expensive coilovers. A good one will be able to set the right amount of preload and adjust your ride height accordingly. The FLT-A2's are great coilovers, it's just that it will ride like sh*t if not properly tuned. I'm guessing your rear preload isn't set right. Could be way off base though.

 

The JIC I got is the z33 set up, it the 10 kg front and 12 kg rear. The back bounce like crazy (noisey), with the softest setting. JIC is good, but some how the 10kg-12kg set up doesnt work so good on the G35. Also on the rear coilover, even if you turn it up to the highest setting it still sit with no finger gap between the wheel and quarter panel. Im guessing the 10kg front and 10kg rear that was made for the G35 might be better.I am selling my for $1000 local pick up or trade, Im in LA. Let me know if anyone up for it. These are good suspension for track, but daily drive is a h*ll no.

 

A person on my350z.com has the z33 setup with custom spring rates of 10kg front and 9 kg rear. He said the softer springs in rear and the roll stiffness transfer towards the front really helped him with rear traction for auto-xing. He said the street ride is a lot better than it used to be. Maybe having softer spring rates for the rear isn't a bad thing.

 

How about if I reverse the front to the rear, so it will me 12kg front and 10kg rear?

 

I think you meant spring perch.

 

hmMm... it might be your tire rubbing look at your tires see if the fender is chewing away your tries

 

You mean ordering some custom 12kg front springs and 10kg rear springs from JIC? You might want to talk to someone at JIC aobut that and see what they say. Not sure if the valving of the front shocks on the Z33 model can take 12kg springs.

 

not sure if this has anything to do with the noise you are getting, but i had the JIC FLT-A2's on my SC300. whenever i hit a bump, i would hear what sounded like a loose strut. i went back and made sure everything was tightened down.... everything was good. i thought nothing of it and eventually got used to it. 1/2 a year later, i notice some fluid leaking from the same strut which was making the noise..... lo and behold, i have a blown coilover! this is my bad experience with JICs, from this point forward, im going with tein.

 

JIC's are known to have very short lifetime. they blow very easily.

 

Yup, sound just like I got a loose strut everytime I hit a bump. The ride is starting to get so ruff that Im starting to hate JIC coilover.