If you're purchasing the T2 springs you'll also need to upgrade the shocks from OEM. Nissan Motorsprots offers a Koni double adjustable although I'm not sure which model Koni it is.

 

The drop is an inch. The spring rates are very high, I think theyre very similar rates as the TEIN FLEX but the T2 rates are 600 in the front and 690 in the rear. I believe in pounds the FLEX's are 690 per corner.

 

So the Koni shocks with the nismo springs would give a good streetable but stiff ride?

 

Whats the stock spring rates? Isn't like 440/240 or something?

 

Your answer is in the Spring Rate Database thread
https://my350z.com/forum/brakes-and-suspension/154233-spring-rate-database.html

Chris

 

Any links to the Koni double adj. shocks that can match with the T2 springs?

 

Check the TC Kline site.
http://www.tcklineracing.com/nonbmw.htm

 

to the OP - for what uses you are describing, springs with matched dampers would meet your needs.

for drag/street however, T2/TCKline would NOT be what you want.

quote sen jen - "if you're gonna boost it, run coilovers". this makes no sense, the two are unrelated.

quote 636racer - "airbags" - i would not recommend these to anyone except for very specific needs - see the airbag thread

quote betamotorsports - "IMHO, unless you're competing at the upper levels of autocross or amateur racing, coil overs won't give you anything". I couldnt agree more. A properly chosen spring rate and damper will do the job. Too many people recommend coilovers to people that will not use their abilities.

pp

 

And this is why I'm considering running just springs and shocks. I had coilovers on my Prelude and NEVER changed the ride height.I'm considering the T2 springs mentioned above but wonder if they are too rough for street driving. But given the stock spring rate, it doesn't seem like it'd be that bad.

 

armitage

T2 springs are very roughly double the OEM spring rate in front and 1.5x in the rear.

If properly dampened, however, they might be streetable. One poster about 2 years ago reported this. The cost of revalving konis are about $110 per shock from truechoice. But definitely not the choice for the OP and his drag racing requirements.

pp

 

Most of the "feel" of a car on the road comes from the shock valving. Doubling the spring rate, keeping the shock compression valving around OEM levels, and increasing the rebound valving will make the ride firmer but not stiffer. I've run a 240Z with spring rates triple the OEM values on the street and because I ran double adjustable Koni 8611s the ride was fine. Passenger comments were that car was firm but not harsh and none belived I was running wheel rates over 300 lb. in.

 

I havent checked back in a few weeks but i opted for the JIC coilovers, being installed Friday

 

Do Tokico shocks & eibach springs