TwinTurbo.NET: Nissan 300ZX forum - I installed NA springs on my TT and love the ride.
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Subject I installed NA springs on my TT and love the ride.
     
Posted by Gordo 93TT Daytona on November 12, 2010 at 10:18 AM
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In Reply To Could use some suspension advice posted by Polish on November 11, 2010 at 03:36 PM
     
Message Before you flamers get started... I suggest you do a little homework first. The front NA springs are identical to TT springs in all respects, except they are a half inch shorter in free length (360mm vs. 370mm) Spring rates (168 lbs/in.), wire and coil diameters are the same. So is the ride. Ride is lower than TT, about the same as the Eibachs I took off.

The rear spring rate is a little softer. (NA: 123 lbs/in. vs, 134 lbs/in.) The wire and coil diameters are within 0.2 inches of each other. Consequently, the ride is a little softer in the rear which is something I appreciate every time I go over a speed bump. There is nothing to suggest a tendency to oversteer with this setup.

The tires and contact patch are bigger than stock. 245 front and 275 rear which puts a lot of extra rubber in the rear to prevent significant oversteer in normal daily driving. In order to compensate for additional body roll of the softer spring rates, I bumped up the sway bar settings all around. The softer springs and bigger bar combo is often used on dirt track cars and works well here.

I had Eibachs (Progressive rates of 188 lbs/in. up to 250 lbs/in)and had the same complaint as many others; that they were too stiff and bouncy. The NA springs give me the lowered ride, a comfortable spring rate, and a compliant contact patch. Plus the TT shocks' dual valving work well with these rates.

Obviously this is not a track setup; however, compared to the really poor ride quality, and pothole impact harshness of the Eibachs, the NA springs/TT shock combos works well for my driving styles.

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