What are you going to go with?

 

either JRZ or Motons double adjustable with remote resevior, most likely JRZ.

 

I knew it, I knew it,.................sigh. Can't go wrong with either

 

If that is true then why did the Unitech team have softer spring rates? The problem as I see it, is when the rear has too high of a spring rate the rear will bounce under very small imperfections on the road surface. The problem became apparent to me when I ran on a smooth resurfaced track compared to an old rough track.

 

LOL, how do you know?

 

people often confused harshness and stifness.
harshness is cause by use high spring rat with improper valving.
a properly valved shock should still absorb the harshness, but will create a stiff ride since spring rate is higher.
i guess unitech is using softer spring rates because they have street comfort inmind when they're developing the suspension.

 

The problem I experience with the HKS Hipermax II is that you can't load the rear tires enough because of the stiffness of the rear springs unless the track is very smooth. Under full acceleration through a corner the weight was transfering back and forth instead of staying at the rear. This was giving the same effect as applying the throttle and releasing and reapplying the throttle and releasing. This was causing an imbalance and making the car difficult to drive on the limits. Softening the dampers in the rear to the maximum and corner balancing the car helped out alot but there still is a very slight bounce. When I ran my car on a very smooth track I didn't have any bounce and everything was fine. In my opinion I believe with a good track higher spring rates in the rear are ok but if not you want a lower rate in the rear.

 

as i mentioned earlier, valving of the shock is critical.
good valving helps you to have the power down the track.
from a simple view, suspension movement have 2 phase, compression and rebound, function of shock is to absorb all the movement from the spring(hence the name shock absorber), so your car will be planted on the road.
if a shock is not properly valed with the desired spring rate, you'll having trouble putting power down the road.
not saying hks's valving sucks, but you dont have much adjustablilty to each compression and rebound, it might be the rebound is too much(just giving an example) in that perticular stifnnes level, so soften the overall setting(which is all you can do) solves this problem.
just keep in mind, same setting yields different result in different track. who knows what kind of track does the manufacture have in mind when they're developing the suspension, so adjustability comes into play.

just my 2cents.

 

just acquired some zeal v6.. subscribing

 

dunno why some of you guys say JIC's suck. putting aside customer support issues (which i cannot say anything about since i hadnt dealth with them), when i put the jic's on, i was blown away -- incredible high-speed cornering, no clunking noises other than the one i'm experiencing now which i found out has nothing to do with the coilover, perfect fitment, thick muscular tube body, japanese quality. yes it is a rougher ride since the springs are stiff as heck, but its not a luxury car. anyway, to each his own!

 

I think people dis like JIC, becuase of CS as you say....

but some others were having issues with the collar siezing up after only a few weeks.

 

i had issues of parts breaking on me... and coilovers literally snapping in half...
not my car where they snapped off.. cause gladly i learned my lesson =)

 

The Function V6 are a work of art! I would not hesitate.

 

How easy is it to adjust the function v6 coilovers on the rear? I know some its hard to get to the adjuster on some coilovers.

 

subscribing... and also still looking for "affordable" street/track coilovers...

 

Any more info on the Zeal "EDFC"? Will it at least be out this year? Tanabe has their TEAS system coming out this October along with their new Sustec Pro Seven coilovers.

 

I recently switched from Teins to JICs and personally like the JICs. However, I have not had the luxury to try out the unitech suspension, which sounds very impressive

 

Just switched from the Tien Flex w/edfc to the ZEAL Function V-6. Street use on 35 series rubber.

Statement from the installer:

ZEAL Function V-6 Install / Fit / Quality / Adjustment

The Zeal coilovers we installed on your 350Z are a very nice product. The fit and finish of the coilovers was of the highest quality, everything fit perfectly with no modification necessary. Installation was very straight-forward, once again everything fit perfectly; installation was simply a matter of removing the original suspension and then installing the Zeal setup. Rebound/dampening adjustment is very easy, simply turn the adjustment **** until the desired setting is shown on the adjustment ****. The adjustment **** is located on the bottom of the coilover on the rear and on the top of the coilover in the front. Once you have selected the desired setting, youre ready to ride. Ride height adjustment is best accomplished by adjusting all the coilovers to the same height before you install them on the car, this way you will be certain that the car will be at a fairly uniform height at all four corners. From this point, it is a trial and error process to achieve the desired ride height. We found it easier to get one end of the car at the correct height before proceeding to the other end. Overall, the Zeal coilovers are an extremely nice product, very well designed and very well built.

My Driving Impressions

After driving with the Tien Flex, set to full soft for 5K miles I was fed up with the stiffness of the ride. Every crack and expansion joint in the pavement was transmitted into the cabin with varying degrees of bumps, thumps and clunks. Over bridges or uneven pavement I might as well have been on an amusement park ride...very bouncy.

The ZEAL's are set on the softest rebound setting (01). First off, I still feel very connected to the road and the Z is as sure-footed as ever. Small variations in the road surface are still communicated to the driver, but just enough to subtley convey the information as opposed to ramming it into your skull. NO more bouncy ride over bridges or uneven freeways. IMO, the ZEAL's are a viable option and improvement vs OEM for anyone wanting to lower thier Z and have an adjustable rebound/compression rate. We are very close to spec camber and toe on the rear of the car with no other modifications other than the Hotchkis sways.

Thank you again illz33 for posting your review.

Also thanks to Adam at Z1 Performance for faciliating shipment of these coilovers so they could be installed in time. Dependable, reputable online vendor.
http://z1auto.com/prodmore.asp?model...ng&prodid=1293

Sorry I don't track the car so no review available there. illz33 is on vacation and does track his Z...from what I have read of his initail impressions he is very pleased with the setup at the 5th adjustment level. Looking forward to hearing a more detailed review from him.

 

Awesome kenny - when you first called me about these a couple weeks ago I knew you were going to love them - they really are that good! How is the rest of the car now from all its other tricks?

 

After about a year and a half my JICs pretty much started to fall apart. The finish on the springs started stripping off and the collars started rusting. Not to mention the damping on them was horrible little to no difference between full stiff and full soft. It didn't really matter anyways because the damper adjustment froze on them anyway. I will never ever buy another JIC suspension product ever.