ronarndt

Can someone confirm what the stock spring rates are for the FD? I have 268 lbs for the front and 201 lbs for the rear in my notes, but I did not write where the source for this info is from. (or whether it is correct). I did a search but did not find what I wanted.

I am going to switch from my current 575lb front 325lb rear to something a little more streetable, since my autoX plans have pretty much fizzled. Besides, I am getting tired of the CD player skipping every time I hit a pavement joint.
Ron A.

Mahjik

iTrader: (1)

I have 263 front and 195 rear for the stock (FD) springs.

Ietein

how do you adjust the spring rate of the car and the damper and those stuff of brakes and suspension. tell me if you people knows.

Mahjik

iTrader: (1)

You buy/install different springs with different rates.

You buy/install adjustable shocks.

ronarndt

Mahjik- thanks. I was not too far off.
Ron A.

Howard Coleman

iTrader: (6)

interesting how things filter around....

i had a Longacre Digital spring rate tester and checked over 30 FD springs. based on my readings and taking an average i came up w.... 263 and 195.

if you want something you will really enjoy driving both from a performance and comfort aspect go w the Eibach Pro Kit. they are 350/255. i recommend the stock shocks as they work well w that rate.

howard coleman

ronarndt

Howard Coleman wrote: "if you want something you will really enjoy driving both from a performance and comfort aspect go w the Eibach Pro Kit. they are 350/255. i recommend the stock shocks as they work well w that rate."

Thanks for the advice. Being a relatively cheap SOB, I will probably re-use the 325 lb springs I have on the back and move them to the front and buy a set of 250 lb Hypercoils to use in the back. I already have Konis that have been re-valved for bump and rebound, so I will put them back on, after I have about 1.5 inch shortened on the rod.

I am still trying to get the almost perfect "feel" that my GTUs came with from the factory. I have had three FC and one FD and the GTUs felt like driving a good handling go kart.
Ron A.

Howard Coleman

iTrader: (6)

you'll want ride height at 25 inches at the top of the wheel well ideally front and rear. low is fast.

howard

DamonB

FSM quotes 270# front, 193# rear.

I measured my old stock springs once for fun. It may interest you:

https://www.rx7club.com/race-car-tech-103/spring-rate-tester-498429/

ronarndt

"ride height at 25 inches at the top of the wheel well"
I used the screw holes on the side marker lights to measure the initial ride height. I will have to see how those measurements convert to the fenderwell distance. I know I am not as low as I want to go yet, but I can not turn the adjustment any more or I will have no load at all on the springs when the car is jacked up. I suspect the guy I bought this setup from on ebay sold it for this reason, but they can be cut down about two inches, if necessary.

adam c

iTrader: (2)

After seeing Damon's post, I decided to look at my 94 FSM. I don't know where Damon found the spring rates. I looked at the suspension specs, and didn't see anything. Perhaps it isn't listed in the 94 FSM.

I did find something very surprising!!! On page R4 (suspension specs), it lists 2 different front coil springs. One has a wire diameter of 12.3mm . The other has a wire diameter of 12.5mm. Free lengths of the coils are also different. 270.0mm & 276.3mm. The rear springs seem to be the same for all cars. It appears that the R2 got the longer springs with thicker wire. This would account for a variation in spring rates on different cars. It looks like the 94 R2's didn't just get stiffer shocks.

If anyone doubts this, there is a 94 FSM that has been downloaded in the 3rd gen section.

NeoTuri

iTrader: (2)

I found this:

http://www.rx7store.net/product_p/rbsoringsfd.htm

260/212 divide out the 7% comes to 243/198. Close enough, I guess.

adam c

iTrader: (2)

Since I was curious about this, I called Ray Crowe (Malloy Mazda) to check.

He said that there are 2 different part numbers for front 94 springs:

#FD 01 34011 for the R2 $86.38 each
#FD 17 34011 for the other models $103.13 each

He didn't have spring the rates for either spring. Who says all springs are created equal?