Turbo Suspension

I recently changed my C2 suspension to Turbo Shocks as I am using turbo wheel carriers for GT3 brake calipers I got. Although I have eibach springs which should lower the car, it seems the car overall actually got higher than the stock shock setup. Does anyone know if the turbo shocks may be lifting the car? Or can it be because I have camber plates, they are adding extra height to the car? TIA Ruey

Very bad move to put a turbo suspension on a C2. The turbo is substantially heavier than a C2 and the shocks/springs are taylored to the weight of the car. This is probably why your car is higher. On top of that, combining that with lower springs probably totally screwed up your suspension... Get this fixed quickly

Jean-Marc, Thank you for the informative reply. You think even though the lowering springs are for a C2 it is bad? I would have thought the turbo shock would basically give a stiffer shock just like going with a billstein sport as you said it was designed for more weight thus more dampening design. You are right about it being totally screwed, not only does the car look ugly, but the spring rattles and suspension is making all kinds of wierd noises. The mechanic put turbo swaybar links with my stock swaybar. Sad thing is I cannot go back to the stock suspension because I have the turbo wheel carriers for the new turbo/GT3 red brakes I got, thus the diameter of the shock strut's lower body needs to be bigger than the stock C2 shock. You think if I get a coilover for a turbo it will help? Anybody, please share input as I opened up a can of worms the day I tried to put GT3 calipers on my car with a turbo suspension setup. Thanks again

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by ruey220: <strong>Jean-Marc, Thank you for the informative reply. You think even though the lowering springs are for a C2 it is bad? I would have thought the turbo shock would basically give a stiffer shock just like going with a billstein sport as you said it was designed for more weight thus more dampening design. You are right about it being totally screwed, not only does the car look ugly, but the spring rattles and suspension is making all kinds of wierd noises. The mechanic put turbo swaybar links with my stock swaybar. Sad thing is I cannot go back to the stock suspension because I have the turbo wheel carriers for the new turbo/GT3 red brakes I got, thus the diameter of the shock strut's lower body needs to be bigger than the stock C2 shock. You think if I get a coilover for a turbo it will help? Anybody, please share input as I opened up a can of worms the day I tried to put GT3 calipers on my car with a turbo suspension setup. Thanks again</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Seems to me that your only option at this point, if you want to keep the GT3 brakes is to get an H&R or Billstein custom set-up for your car. You will also need to remove the Turbo sway bars and go for GT3 ones. Again, it's a weight issue. It might also be possible for you to go to a full GT3 suspension but again, that car is quite a bit heavier out of the box than your C2... Anyway, don't drive the car (it's probably dangerous) and sack the mechanic! I suggest you call someone like Steve Weiner (check the 993 board), he will know how to fix this but be prepared to spend much $. I can't see you gte out of it for less than $4K... I hope that I am wrong JM

Whoever installed the suspension for you did a huge dis-service. In the medical world it's analagous to malpractice. I would suggest going to a coil-over setup (H&R) with GT3 bars. As Jean Marc suggested call a professional for advice, Steve Weiner at Rennsport or Kevin Buckler at The Racer's Group - both Rennlist Sponsors.

Are the camber plates you used for 996TT. It is really important that you use a style camber plate (upper shock mount) that is designed to work with the upright (wheel carrier). As for as the Gt3 brakes, you need to use "GT3" uprights. What rotor are you using? The TT uprights use the same bolt pattern, however, the rotor offset is a couple mm different causing other problems. As far as shock stiffness, you shouldn't be concerned with what car they came off of as much as what spring the meant to control. Matching the spring with the shock is much more important. Remember the stiffness of the car is controlled by the spring, never try to make the shock control the stiffness. Rob king at S.Cargo has done tons of these and has it handled. I agree just stop in and see him and he will get you "out of bind" and on the road in no time.

Cary, You are correct about the camber plates. That is one thing my mechanic did tell me which was correct. The stock spring hat for the 996 C2 will not work on the turbo wheel carriers because of the angle that is different on the stock wheel carriers. I'm trying to research whether #1 these can be a cause for the rattling suspension, and #2, if they can be raising the car 1 inch, as I do have Eibach lowering springs already. The brakes I got were from ebay a while back, and they were GT3 calipers, but told that I can use the turbo parts since they were so easy to get. Now I realize, that I was probably also sold turbo brake calipers, while the seller sold them as GT3 to advertise a quick sale and higher price. $1250 for all 4 calipers. The answer about the rotors, they are turbo rotors, which I purchased seperately. Previously before this project, I spec'd everything to turbo since there was so much turbo parts availble as the GT3 I thought needed to be ordered from Germany. Overall, I messed this one up big time by trying to be cheap and by parts left and right, which in the end costs me more than double if I just went ahead and bought a GT3 brake kit. The reason I didn't go to S.Cargo or Racers group is its about a 1.5 hour drive from where I live, and the mechanic I went to, is only 30 minutes from me. Honestly though, My car's suspension besides the rattling and the higher front end stance it feels more neutral, firm and stiffer. Thanks Ruell

Sounds like you have everything turbo now accept the springs. The only thing now I don't understand is the spring for a turbo and a non turbo have differnt dimensions. At any rate sounds like you can just get turbo springs and be done with it. Hard to say without looking at the car though. When I think of GT3 brakes I think of the 6 piston cup brakes but, now that I understand better, it does sound like you're all turbo at this point. If you're near San Jose call Smart Racing Products. They have some pretty sharp guys there that may be able to help. [phone removed] Ask for Rich

Cary, Maybe the springs are rattling because of the size dimensions you mentioned. The only reason I won't go with a turbo spring at this point is I have 996 C2 Eibach lowering springs in the back also, which drops the car 1 inch. From what Viken mensions in a previous turbo suspension thread, he said the Turbo has heavier weight thus the spring would raise the car even more to compensate for extra weight. I may go with a turbo lowering spring, but because the tuner designed it for heavier weight, it may also fail to get the car lower in proportion to the rear. My mechanic mentioned they can cut the spring, or check with Eibach if they can provide a shorter spring, etc. They told me they cut springs all the time and it won't be risky. But to be sure, they said call Eibach first. You've been much help. I'm gonna email you a free calling card as you've been much help for me. I know it ain't much but that's my line of business, and its the least I can do for all your help. Ruey

Bare with me, I no expert at all... I have a question now, if you cut the already stiffer Eibach C2 springs, wouldn't that make them even stiffer? even though you would achieve a lower ride look, wouldn't that unbalance the suspensions even more since you keep the stock turbo shocks on? To me the only solution for adequate handling would be to replace the whole suspension kit with one (complete kit) that would be compatible with your brakes, such as the GT3's (2970lbs) and be done with it? will the C2's X74 suspension kit fit?