Bump Steer + RS Uprights
#31
Pro
Thread Starter
Well, it's all installed along with new brake discs etc. By buying the bearing cover and bolt, new abs sensors and screws it was a really easy swap (for my mechanic). Took less than 4 hours total.
I've also has the alignment set to:
Front camber 1o29' each wheel
Front Toe 0o15' each wheel (toe in) Total toe 30'
Rear camber 1o25'
First impressions are (driving car 100 miles in the rain home), car has much sharper steering, much more precise. Follows my inputs much better. The steering & car is no longer darting about doing it's own thing. It feels like all the noise has been filtered out.
I'll see how it feels on track next week.
I've also has the alignment set to:
Front camber 1o29' each wheel
Front Toe 0o15' each wheel (toe in) Total toe 30'
Rear camber 1o25'
First impressions are (driving car 100 miles in the rain home), car has much sharper steering, much more precise. Follows my inputs much better. The steering & car is no longer darting about doing it's own thing. It feels like all the noise has been filtered out.
I'll see how it feels on track next week.
#32
Rennlist Member
Glad to hear you already notice a positive difference
#35
Rennlist Member
#38
Pro
Thread Starter
Well. first track day is behind me. The only work done on the car has been the RS uprights and a tiny bit more camber up front.
The car is MUCH less inclined to understeer now. Much more of a difference than I can imagine 1/6th of a degree of extra front camber can give. I was wondering if the hubs altered other geometry such as additional camber when the wheels are turned?
Most impressed. Just a nice evenly balanced car.
The car is MUCH less inclined to understeer now. Much more of a difference than I can imagine 1/6th of a degree of extra front camber can give. I was wondering if the hubs altered other geometry such as additional camber when the wheels are turned?
Most impressed. Just a nice evenly balanced car.
#39
Pro
Thread Starter
I will add. Trail braking of any sort would result in the back coming around quite quickly! Before I had to carry the brakes on initial turn in to keep the nose tucked in.
#42
Rennlist Member
Well. first track day is behind me. The only work done on the car has been the RS uprights and a tiny bit more camber up front.
The car is MUCH less inclined to understeer now. Much more of a difference than I can imagine 1/6th of a degree of extra front camber can give. I was wondering if the hubs altered other geometry such as additional camber when the wheels are turned?
Most impressed. Just a nice evenly balanced car.
The car is MUCH less inclined to understeer now. Much more of a difference than I can imagine 1/6th of a degree of extra front camber can give. I was wondering if the hubs altered other geometry such as additional camber when the wheels are turned?
Most impressed. Just a nice evenly balanced car.
Having played with several strut based race cars over the past few year I can say correcting the lower control arm angles has a profound effect on front end grip. It has solved many under steering problems we've have had on race cars.
Last edited by MarinS4; 08-27-2016 at 08:48 AM.
#43
Pro
Thread Starter
I have followed many of the RS upright threads and most seems to miss the fact the uprights correct the lower control arm angle as well as the tie rod angles. The kit is touted for it's bump steer correction (which it does nicely) but the other big bonus is correcting the lower control arm angle and camber curve. On a strut type car when you lower it too much you end up with camber losses as the arm works through it's range of motion. With correct control arm angles you get some camber gain in the initial portion of the curve.
Having played with several strut based race cars over the past few year I can say correcting the lower control arm angles has a profound effect on front end grip. It has solved many under steering problems we have had on race cars.
Having played with several strut based race cars over the past few year I can say correcting the lower control arm angles has a profound effect on front end grip. It has solved many under steering problems we have had on race cars.
#44
Rennlist Member
#45
Rennlist Member
Grab em wherever you can. They are on world wide back order right now. I was told by Steve W Porsche Motorsports plans on making em again. It's hard to believe Porsche will continue to make such a part on a 20 year old car though. Just glad I got my hands on set!