PSS10 re-adjust ride height - need to re-align?
07-31-2009, 03:42 PM
#1
Nordschleife Master
Thread Starter
PSS10 re-adjust ride height - need to re-align?
If I re-adjust the ride height on my PSS10's do I need to re-align?
07-31-2009, 03:49 PM
#2
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Unfortunately, changing ride height changes the static alignment.
Think of it this way: As you go around a corner, the outside spring compresses and the suspension tries to give you more camber. The toe probably changes also - depends on the car. When you raise or lower your car you are doing the equivalent of compressing or decompressing the spring.
You may find that you don't mind the change of alignment as it should be fairly minor, but, it could be the difference between wearing your tires out quickly or not.
Bob
Think of it this way: As you go around a corner, the outside spring compresses and the suspension tries to give you more camber. The toe probably changes also - depends on the car. When you raise or lower your car you are doing the equivalent of compressing or decompressing the spring.
You may find that you don't mind the change of alignment as it should be fairly minor, but, it could be the difference between wearing your tires out quickly or not.
Bob
07-31-2009, 07:48 PM
#4
Nordschleife Master
Thread Starter
07-31-2009, 07:54 PM
#5
Burning Brakes
I think one turn is about 2-3mm's but don't quote me on this...I've been told by an alignment/suspension shop that one could move a couple turns and likely be fine for street driving.
Are you wanting to drop it all the way around or just bring one end up? Also, probably not a good idea to mess with just one corner...if you make a change do it to both sides.
Are you wanting to drop it all the way around or just bring one end up? Also, probably not a good idea to mess with just one corner...if you make a change do it to both sides.
07-31-2009, 08:00 PM
#6
Nordschleife Master
Thread Starter
I think one turn is about 2-3mm's but don't quote me on this...I've been told by an alignment/suspension shop that one could move a couple turns and likely be fine for street driving.
Are you wanting to drop it all the way around or just bring one end up? Also, probably not a good idea to mess with just one corner...if you make a change do it to both sides.
Are you wanting to drop it all the way around or just bring one end up? Also, probably not a good idea to mess with just one corner...if you make a change do it to both sides.
07-31-2009, 08:42 PM
#7
Rennlist Member
Bringing the rear down a tad won't affect you as much as adjusting the front. It will give a bit more neg. camber in the rear and, if the car has been corner-balanced, it will throw that off somewhat as well. Keep in mind that the rear should be ever so slightly higher than the front.
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07-31-2009, 10:22 PM
#8
Nordschleife Master
Thread Starter
Bringing the rear down a tad won't affect you as much as adjusting the front. It will give a bit more neg. camber in the rear and, if the car has been corner-balanced, it will throw that off somewhat as well. Keep in mind that the rear should be ever so slightly higher than the front.
08-01-2009, 02:02 AM
#10
Nordschleife Master
That is about the max I would do with out getting it realigned. It will add a bit more camber & toe in the rear. Going down is up then going down in the rear. If you run 0 rear toe & went up, you can get toe out, & that can be very dangerous.
Last edited by Stealth 993; 08-01-2009 at 12:17 PM.
08-01-2009, 02:26 AM
#11
Rennlist Member
I'm not even going to guess on kinematic toe with any change in ride height...........
On a trailing arm car I usually found 1/2" in ride height changed toe maybe 1/8" (lowering would toe out, obviously). All bets are off on a 993.
In any case, I'd follow the established euro/RS height. If it didn't get set right the first time around, I suggest having whoever correct it. If you did it yourself, toe is absolutely the biggest factor in tire wear with a street driven car.
On a trailing arm car I usually found 1/2" in ride height changed toe maybe 1/8" (lowering would toe out, obviously). All bets are off on a 993.
In any case, I'd follow the established euro/RS height. If it didn't get set right the first time around, I suggest having whoever correct it. If you did it yourself, toe is absolutely the biggest factor in tire wear with a street driven car.
08-01-2009, 10:50 AM
#12
Nordschleife Master
Thread Starter
I'm not even going to guess on kinematic toe with any change in ride height...........
On a trailing arm car I usually found 1/2" in ride height changed toe maybe 1/8" (lowering would toe out, obviously). All bets are off on a 993.
In any case, I'd follow the established euro/RS height. If it didn't get set right the first time around, I suggest having whoever correct it. If you did it yourself, toe is absolutely the biggest factor in tire wear with a street driven car.
On a trailing arm car I usually found 1/2" in ride height changed toe maybe 1/8" (lowering would toe out, obviously). All bets are off on a 993.
In any case, I'd follow the established euro/RS height. If it didn't get set right the first time around, I suggest having whoever correct it. If you did it yourself, toe is absolutely the biggest factor in tire wear with a street driven car.
