When to replace shocks
10-21-2010, 09:05 PM
#16
Rennlist Member
Stock springs on most good cars, are nice LONG linear springs.
Sport springs are generally..short progressive ones, or even if linear, are very stiff.
Springs retain the ride quality, bars and shocks bring the sport into it when you need it.
IMHO
Sport springs are generally..short progressive ones, or even if linear, are very stiff.
Springs retain the ride quality, bars and shocks bring the sport into it when you need it.
IMHO
10-21-2010, 09:11 PM
#17
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If your car is a weekend driver, the Eibach springs and Bilstiens will bring a smile to your face, particularly in spirited driving. The car corners amazing flat with the Eibachs. Simpls is that double the spring rate halves the body roll. The progressive nature makes the stiffe ride tolerable. The Bilstiens give great control with the stiffer springs. Combo is much more sports-car than grand touring as far as ride quality.
I've got a '79 Harley XLCR Cafe Racer. It can be ridden for about 50 miles before your butt hurts and you start squirming around looking for a spot that doesn't hurt as bad.
That's about exactly the same as a 928 with stiffer springs, in my mind.
Turns the world's finest highway touring car into an absolute worthless vehicle.
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greg brown
714 879 9072
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Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
10-21-2010, 09:32 PM
#19
Rennlist Member
I must be of the minority, but the Eibach/Bilstein setup on my car by no means feels harsh to me. Yes it's more harsh then the stock springs and shocks, but I have no problem with the stiffer ride.
10-21-2010, 09:33 PM
#20
Rennlist Member
IMHO, when you say any spring other than stock, youre just asking for a stiff cranky suspension. Cuz..with the much shorter length of travel the shorter spring has, it has to be a LOT stiffer to prevent bottoming out.
10-21-2010, 09:53 PM
#21
Rennlist Member
The only car I've seen springs actually worn out was my 80K mile 944 Turbo S and it was the rear torsion bars that had softened. It was enough that the rear suspension hit the bump stops on hard acceleration.
When I replaced the rear torsion bars I went bigger, what I would call sport and not race. I quickly found I had to also upgrade the front springs, and sway bars. It had stock Koni Yellows so I was able to stiffen them enough to match the rest of the suspension. Was a different car after all the suspension bits were matched and balanced.
After that experience, if I were going to upgrade ANY part of the suspension I would SERIOUSLY look at upgrading everything to be matched and balanced.
My GTS currently has Hypercoils, Koni Reds (w/ external rebound adjustment), Devek front sway bar, and Ott Steroid drop links in the rear. With 18 inch rims it's not what I would call smooth around town, but at speed on the highways and byways it's a dream.
When I replaced the rear torsion bars I went bigger, what I would call sport and not race. I quickly found I had to also upgrade the front springs, and sway bars. It had stock Koni Yellows so I was able to stiffen them enough to match the rest of the suspension. Was a different car after all the suspension bits were matched and balanced.
After that experience, if I were going to upgrade ANY part of the suspension I would SERIOUSLY look at upgrading everything to be matched and balanced.
My GTS currently has Hypercoils, Koni Reds (w/ external rebound adjustment), Devek front sway bar, and Ott Steroid drop links in the rear. With 18 inch rims it's not what I would call smooth around town, but at speed on the highways and byways it's a dream.
10-21-2010, 09:57 PM
#22
Rennlist Member
Makes sense. However, do you have specific experience with this on a 928 or are you generalizing?
10-21-2010, 10:00 PM
#23
Rennlist Member
Unless physics somehow works different on a 928, than the 8 or 12 other cars that ive learned the same lessons on...im open to how a stiffer spring doesnt ride harsher than a softer one.
10-21-2010, 10:02 PM
#24
Rennlist Member
10-21-2010, 10:13 PM
#26
Rennlist Member
I recently put Eibach springs with stock Boge shocks on my 84.
The ride is a HUGE improvement over what the worn springs and shocks were.
I like the ride and also that it is not real harsh.
If you want a stiffer ride, then Eibach with Bilstein.
My $0.02
Cheers,
The ride is a HUGE improvement over what the worn springs and shocks were.
I like the ride and also that it is not real harsh.
If you want a stiffer ride, then Eibach with Bilstein.
My $0.02
Cheers,
10-21-2010, 10:26 PM
#27
Burning Brakes
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I just did the same swap on my 84... and completely agree. Huge.
10-21-2010, 10:27 PM
#28
Burning Brakes
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Hmmm.
I've got a '79 Harley XLCR Cafe Racer. It can be ridden for about 50 miles before your butt hurts and you start squirming around looking for a spot that doesn't hurt as bad.
That's about exactly the same as a 928 with stiffer springs, in my mind.
Turns the world's finest highway touring car into an absolute worthless vehicle.
I've got a '79 Harley XLCR Cafe Racer. It can be ridden for about 50 miles before your butt hurts and you start squirming around looking for a spot that doesn't hurt as bad.
That's about exactly the same as a 928 with stiffer springs, in my mind.
Turns the world's finest highway touring car into an absolute worthless vehicle.
10-21-2010, 10:32 PM
#29
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