T56 weight

Well i weighed the trans today with the torque tube attached and shifter in place. The hole unit came in at 180 LBs. I know we were talking about this on another post, if i remember correctly the turbo was 140 LBs, so we have a 40 LB diff between the stock and the T56. I am going to do a plate in front of the rear carrier, at the joint in front with two bushings and hang, this way the rear carrier can be changed at will with no obstructions. Now question, spring rates for the rear shocks, any thoughts? 600 to much, i want to be able to have luggage and clubs in car. but not ride horrible.

If this is primarily a street car I think 600 is getting a bit high and ride will suffer dramatically.
If you're using 18 inch wheels with low profile rubber it will be even worse.
I used to run the Bilstien Escort Cup shocks and struts that are valved 600/190
on the track, with torsion bars deleted and 450lb front and 550 rear springs.
This was with 9x17 wheels and 275/40 rubber all the way around. On track worked really well.
This same setup on the street sounded like it was going to break the car in half
over big bumps or train tracks.
The car i have now has same struts and shocks valved 380/150, bars deleted,
with 375 front and 450 rear springs, with 7 and 8 inch wide by 16 inch fuchs with 225 and
245 rubber and on the street this totally liveable, and dare I say smoother then I expected.
I think the smaller wheels with larger, more forgiving side wall makes a lot of difference.
Haven't had it on the track yet, but I will prolly buy some 17's and track rubber for that.

Thank you fro your responsw. My car will see auto cross and a lot of highway miles, may get a track day, but we dont have any really good tracks up here in the north.

I originally was going to shoot for something around 600-700. What helped me decide was looking at the 944 Rear Spring Rates vs. Effective Rates article/chart. I compared stock rates for my s2 and wanted to be stiffer than that for sure... but still streatable. I realized pretty quick that 600-700 was way too stiff for a street car that sees the track occasionally. I want to be able to drive the car any day its good weather and not get beat to death by the suspension. I settled on 450lb 10"x2.5" hypercoil springs. I plan on running 17" wheels after I sell my 16" 968 wheels. I am trying to avoid 18" wheels if possible.

Part list

Koni 30-5325 (2) - (Circle track single adjustable shock)
Hypercoil 2.5" x 10" 450lb Coil Springs
Allstar ALL64147 Sleeve Kit (2)
Lower Shock mount 1" extension/adapter bolts - (Racers Edge or Custom Local Fab)
Upper Shock mount Sleeves/Spacers - (McMaster Carr/Online or Local Fab)
Machine snap ring groove into shock housings - (Local Machine Shop)

How about a progressive spring?
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Stu

Stu thank you for the link I will do some reading about that.