No biggie.

 

I doub that H&R sways has fitments issues for the 997TT. They already sponsored porsche cup's and have a huge R&D in the racing world. So i gave a shot for them. Another factor is that since i'm from europe, i can deal better with H&R than GMG.

What is the most usual setting: stiffer on the rear and soft on the front?

 

GMG sways can use the stock drop-links, and have 3 stiffness settings to choose from. GMG recommend soft on the front and stiff on the rear sways to reduce understeer. I myself find this a little too tail happy so have soft fronts and middle stiffness on the rear.

BTW - I am also in Europe and had no issues dealing with GMG.

 

I use middle for street and full stiff at the track on my rear gt2 bar, the stock front is plenty soft.

 

C, I'll be in touch, thank you.

 

I go to a lot of different track so I like the med fr/r. At a long track like the glen, soft fr/stiff rear works best.

 

I will receive the sways in 3 days and will pay €450 with installation included. I doub that GMG would put at my door as fast for the same price, after VAT and duty taxes... Correct me if i'm wrong, but i believe that HR use also the stock drop-links and have 3 stiffness settings.

Thank you all for the sways setting feedback.

 

wouldn't it be correct to assume that the stock shocks aren't designed to work with the lowering springs?

 

You would be very surprised, the stock PASM dampers do quite well with springs.

 

Yes it is. When you change just the spring, what you are asking the stock damper to do:

1. Piston shaft position that is outside of its intended range. At normal driving this might be ok. In the heat of battle, at high speed cornering with more compression, there is no reason to expect this to be a good thing.

2. Dampening rate that is not designed for the spring.

Bilstein who makes the stock unit, and any competent tuner will tell you that this is a compromise.

 

Did Porsche use different shocks back in the day when they offered two springs, one for european consumption and then the 'Mustang GT' ride height sized ones for the US models?

 

If you plan on tracking the car, a good set of coilovers would be a good call. If it's just for daily use, lower springs and sways would probably do the trick for you.

 

When you lower the car on the coil over are you not also decreasing the travel of the damper? Any damper has a fixed travel, seems to me this is the same effect as a lowering spring on a stock damper.

 

Very good question -- and the answer is yes. The shock absorbers ARE different from USA versus ROW. More specifically, the dampening force, both bound and rebound, are all different.
There is an article in Panorama http://www.pca.org/panorama/sample_article_3.html that actually measures this. (Written by, of all people, a radiologist and an anesthesiologist.) The site is down for now, so please don't hold me to this, but I think the curve below is from that article. The point is of course, the relationship is very finely tuned and you just can't change a spring and expect the shock absorber to operate in perfect condition if the change is not within its specified range.

If you call Bilstein, they will be quite adamant about the 2 points that I mentioned (shock height and damping force fine-tuned to a spring rate, or a reasonable range of spring rates). Without doubt, the result of lowering spring is good, as some of the veterans like Doug/Got Boost/eclou, etc., have reported. But somewhere in that setup, there is a compromise.

Doug,

Bilstein has a range of travel that is specified (where the 5mm to 35mm range comes from, this is very specifically noted in the instruction manual, or at least my interpretation of it ). I don't know what the spec for stock is but it's NOT 1 inch/25mm. I believe this is where the fear of premature valve failure comes from. The 2 points I brought up are old news and probably could be found in numerous old posts.

 

I finally installed techart springs, and I noticed that the softer part of the springs , the one with the teflon tubing are completly compressed (touching) when the car is static (not moving) is this normal? havent gone for a test drive yet.