I'm thinking of improving the handling of my GTV, I don't want to compromise comfort as I use my car for everyday driving and not track use.
I've been advised Eibach springs on standard dampers, has anyone done this?
Any other suggestions?
There are so many threads on this. Do a search and you will find plenty of opinions on the best combination. The general consensus is that Eibach Prokit springs with the 20mm drop and Koni Sports adjustables are the best combination for the 916 cars. This is the combination I have on my Spider, and the results are superb: a firm, progressive ride, not uncomfortable under normal driving conditions. However, if you have plenty of speed bumps to negotiate, you will have to take a little extra care over the bumps I'm afraid. Ironically though, under normal driving you will bottom out less with the uprated combination as the progressive ride is so more effective than the OE set-up.
This is the best way I can summarise the main points, given the comments on here, particularly with those driving the V6 cars:
1) The TS/JTS cars have different spring and shock settings compared to the V6 cars. The V6 cars actually sit a little lower, they have a more progressive spring rating than the TS/JTS cars and it can be argued that retaining the original springs and uprating the shocks on these cars is a reasonable compromise for normal everyday driving (as suggested by alex_b).
2) For the TS/JTS cars (as in your case) the original set-up is not particularly good, as you've found out. The last thing you want to do is retain the shocks and change the springs. The original shocks are rubbish anyway but drop the car even by 20mm and the shocks will be operating well outside the operational 'comfort zone' and your ride will be a disaster. You will constantly hit the bumpstops and you will have no reliable progressive ride at all. Infact, I would suggest this combination would verge on the dangerous.
3) The Eibach/Koni Sports on the TS/JTS cars does appear to be the best combination, but if you do go with this I would suggest the following settings for the GTV:
i) On the rears set the shocks to the softest setting before fitting. This gives the best compromise and is not harsh for normal driving. This gives a firm and progressive ride with the Eibachs, without making the rear too jittery and allows the rear suspension arms and set-up to best deliver the secure and 'passive steering' effect these cars are justly famous for. Unfortunately once fitted the rears cannot be adjusted unless you take them off again, so this really is the best compromise for normal everyday driving.
ii) For the front Koni suggest themselves to give the shocks one half-turn with the key to firm things up a little for the GTV (not the Spider). Since the fronts are accessible for adjustment you can experiment for yourself to find which is the best setting for you.
iii) It is highly recommended that you fit a front upper strutbrace. This stabilises the front dramatically when cornering, and is such an effective mod for very little money.
4) Finally, others have gone the powerflex route on the rear arm bushes. I have done this myself and the results are also dramatic. However if all the arms on your car are ok I would leave well alone. If you're doing a lot of City driving then this upgrade is not really necessary anyway.
But whatever you do (and sorry to repeat this), don't change the springs and retain the original shocks.
You realy will land up with a compromised, horrid ride if you do this.