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I hate the aftermarket ride quality of both H&R & Eibach springs, (the old Weltmeister 928 springs too), so I cut the factory down by about 1.5 coils & then thread the factory-adjustable spring perches down to lower the car about 2.5" or so. It limits the fronts more than the rears as many 928's run newer 996/997 wheels, where the offset is shy at 50mm (factory 928 offset is 65mm), so if the car is high enough, the newer wheels fit "ok".
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Mark Robinson
HCR-PCA '94-'09
Red '91 965 BB-turbocharged
Red '86 928S turbo
Red '88 951S
Ren '82 928S turbo track car
By re-threading do you mean just rotate with your hand until you reached the desired height? Or did you have to take them off and actually cut a new thread? I've cut so many spring on old VW's that I've had, that it's not even funny! It's actually a cheap but effective way to get the exact desired ride height for your car. What was it about the aftermarket springs that you didn't like? Cutting the factory ones usually stiffens up the rides almost like the aftermarket ones...............at least on the VW's of the past.
BTW if I got 18x10's on the back. Could I run the same tire you are? 285/30? Will the 1/2" make a difference on how the car rides or how it fits on the wheel?
yes, spring perches are adjustable by hand. I cut the spring to both slightly stiffen (does not stiffen as much as H&R, Eibach), and ensure I can lower the car enough.
Yes, 18x10 with a 285/30 is common on the rear of 928's w/o rubbing.
__________________
Mark Robinson
HCR-PCA '94-'09
Red '91 965 BB-turbocharged
Red '86 928S turbo
Red '88 951S
Ren '82 928S turbo track car
Thanks Mark. I wish I had a good reliable mechanic in Dallas. I have a bunch of questions for you regarding your turbo install. I'm on the fence between SC (twin screw) and single turbo. What type of FI system would you use if you had it to do over again, and why? Would you consider helping me with an install. I would pay you of course!