2015 A3 TDI
2012 Golf R CW 2DR (Deposit down on a 2015 mk7 R)
2011 F150 SCrew 5.0
2000 911 C2 Aero Brumos Special Edition 'B59'
1970/73 911 RSR residing within a 2011 ATC 24 ft VNose
Taking into consideration MKV euro springs which I used on '07 Gti the coil was wound differently however the ride was the same.The big difference was the turn in,set time in the rear was direct with no delay and the ride height was also dropped 10 mm compared to US spec.
Also, I gave some more thought to the numbers that autofi posted. Based on that, and all other things in the suspension being equal (as we've been told they are), won't the Euro R have less roll resistance on the rear axle relative to the roll resistance on the front as compared to the US R? And wouldn't that result in more understeer on the Euro setup?
I sense some confusion between spring length and spring rate.
Volkswagen specifies the spring rate (in N/mm, or lbs/in for those inclined to use imperial measures) to match the axle masses of the car, depending on the equipment and the resultant mass (or weight, as we like to call it). This allows all the variations in the car to behave identically, regardless of equipment (and thus, weight).
The length of the spring is not related to the spring rate. Hypothetically, a European Golf R with full equipment and a curb weight almost identical to a North American Golf R will have the very same spring rate as the NA vehicle. Howver, the length of the spring is different, and the North American Golf will have a slightly increased ride height.
Assuming identical spring rates and that the small variation in ride height didn't change the geometry (i.e. roll centre) significantly, the driver will not be able to discern the difference between the European and the North American Golf R.
One thing I already know is that the Euro springs will NOT give the perfect ride height that I'm looking for. I think the H&R Sport drop looks just right; the Euro springs will not give me that. However, I'm absolutely unwilling to sacrifice the other things you mentioned to get that "perfect" ride height. IMO, you have to compromise on one or the other. I've gone both routes on previous vehicles. For the R, I choose to compromise on the aesthetics and stay close to OEM ride, handling and durability.
I make this point again (and I'm not referring to you specifically here, Rgento) because I don't want anyone thinking that this is some kind of miracle solution and then they see pics and become disappointed that it doesn't give them as much drop as they would like.
I agree with autofi on the control arms. They don't look like they can tolerate the car being lowered too much more, or the angles would be pointed upward. This could possibly affect the ride much more than we may think. I agree with Tlud in wanting to get a better look without compromising the ride too much. The car rides pretty good right out of the box. The guys spent a lot of time in Germany perfecting the suspension so it would drive the way it does.
Tlud, any updates when you will be getting your euro springs. We are in Dallas, still trying to figure out how to lower the car and maintain a good ride. We also independently posted how the larger tires of the 19s help decrease the fender gap above the tires by being a larger size. A .4 plus a .2 makes .6 inches in decreased gap, which is significant for the cost of the euro springs. Just enough to make it look like the euro pictures.
You may want to look on the VWR UK website and read about their products. Interesting comments on their springs and why not to use even theirs on the 4 motion cars. They want us to use their coilovers?? Looks like they are working with APR as mentioned in earlier posts.
Thanks to the link to the VWR page. That page actually causes me to give them some credit. First, they published their spring specs, so that you actually know what you're putting on your car. Second, at the cost of additional sales, they specifically note not to use their springs on cars with 4motion. The warning was a little vague, however, so I think I will shoot them an e-mail with a few questions to get some more input.