ZZtopp

iTrader: (1)

Can anyone provide a review of the Tein H-tech springs? I couldn't find one when searching.

havabooz

i dont think anyone has them...are you interested because of the spring rates or because you dont really want a drop?

ZZtopp

iTrader: (1)

Both. I do want a small drop but I don't want to have to roll the fenders. I going to install the Konis in couple of weeks and I'm considering a spring upgrade at the same time.....something that may help to improve the ride without compromising the handling.

Gsedan35

iTrader: (10)

Here ya go, the only (known of by me) H-tech on a Z install and review.

https://my350z.com/forum/showthread....threadid=72246

To recap the mild drop springs.

RSR 350Z (mostly a linear spring, one coil at best is progressive)
345/417 F+10% R+22% vs oem
Transfers 12% roll stiffness to rear

Tein H-tech 350z (front progressive rear linear)
Front:358 Rear:375 F+14% R+11% vs oem
Transfers +3% roll stiffness to front

Tein S-tech 350z (front progressive rear linear
Front:386 Rear:402 F+23% R+16% vs oem
Transfers +7% roll stiffness to front

350ZOWNZ

Gsedan35 i thought the stock spring rates for the 350Z were

347 lbs/inch front and 419 lbs/inch rear


Thats what ive always heard. Were did u get the info on your spring rates? maybe ur thinking of the G35Coupe spring rates?

Gsedan35

iTrader: (10)

I'am the source of the 347/419 rate info. That rate data was in error, I did a post a while back where I corrected myself and posted the corrected rate data of 314/342. But not everyone saw that post as the old data keep cropping up. Of note is the fact that Hotchkis got 310/350 for the oem rates. We are close enough to each other to confirm each other, the slight difference can be explained by normal coil spring rate testor +or- error.

G35 coupe and 350Z springs are the same, same rates, the two suspensions differ by shock valving only. Even the G35 sedan with the sport suspension use's the same rates, sedan spring is taller, but Nissan altered the wire diameter and number of active coils to make the rate the same.

ZZtopp

iTrader: (1)

Thanks for the info!