recommend some shocks?

[ZR8ED]

After further testing with the cars handling, and letting some pro drivers behind the wheel of the car, There is a conclusion that my rear shocks are not strong enough.

 

They are only a couple of years old and are in good shape.. they just can't control my upgraded rear springs.

 

Anyways, there are Tokico Illuminas. I need something stiffer.. maybe adjustables? The front seems to be ok.. it was too loose before, but with the better weight distribution of the driveline, the front end is now just right.. I had to stiffen the rear springs after the conversion, as the torque from the engine would bottom out my old springs. hehehe

 

Any ideas for a stiffer shock in the back?

 

Thanks.

[Guest Anonymous]

koni double adjustable inserts series 8611.

http://www.koni-na.com/catalog.html

Go to motorsport catilogue and check out what they have to offer.

[Guest greimann]

I just put adjustable Illuminas all around and on the #5 setting, I can't immagine anything stiffer. It will literally rattle your brain stem!

 

Check here for the best price around.

 

http://www.autocarparts.com/

[johnc]

The issue with Tokico Illuminas (and other off-the-shelf shocks for that matter) regarding spring control has to do with rebound. The series of Illuminas that fit a 240Z rear (the standard rears or the fronts moved to the rear) can only control a spring with a rate of 300 lb. in. or less. "Stiffness" is compression damping which has little to do with spring control.

 

Single adjustable shocks have a built in compromise in the relationship between compression and rebound damping. Unfortunately, the relationship is mostly linear. Stiffen up rebound damping to control higher spring rates and you get a corresponding linear increase in compression damping - whether you want it or not.

 

A car with well tuned shocks does not feel stiff (assuming no aero ride height requirements). The suspension is compliant in bump and firm in rebound. You want bump compliance to keep the tires in contact with the road and to let the springs do their job. You want firm rebound damping to eliminate pitch and increase responsiveness.

 

Unless you are running rear springs with a rate over 300 lb. in. I would think the Tokico Illuminas would be OK. Try different settings front AND back. When I ran 275 front and 300 rear springs I would have the tokicos set at 3 or 4 front and 4 or 5 rear. Also, check to see if you have a bad shock. The Tokicos do fail.