Notices
991 GT3, GT3RS, GT2RS and 911R 2012-2019
Sponsored by:
Sponsored by:

3 wheel rid'in RS

Thread Tools
 
Search this Thread
 
Old 10-03-2019, 10:36 AM
  #1  
FriedEggs
Track Day
Thread Starter
 
FriedEggs's Avatar
 
Join Date: Dec 2018
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
Default 3 wheel rid'in RS

I've owned my fair share of exotics and cars that where much lower than my .1 rs. Yesterday I pulled into a parking lot with the front lift up and my front wheel came off the ground about 1'. Ive never had this happen before, then again this morning backing out of my driveway it did the same. Dosent seem to be an issue and its actually quite impressive but what about these causes this?

As a side note pulling into the house bumpin' snoop dogg does feel a lot cooler now...
Old 10-03-2019, 11:20 AM
  #2  
HEAT'N'COOL
Rennlist Member
 
HEAT'N'COOL's Avatar
 
Join Date: Sep 2014
Location: Somewhere in the AIR
Posts: 368
Received 22 Likes on 17 Posts
Default

A stiff suspension like the one on the RS will cause this. Its a pretty ridged setup on the RS. Mine does that all the time. So did my GT3.
Old 10-03-2019, 11:28 AM
  #3  
Christian Plyler
Racer
 
Christian Plyler's Avatar
 
Join Date: Sep 2019
Posts: 297
Likes: 0
Received 85 Likes on 48 Posts
Default

The anti-roll bars cause this specifically.

When one side is in compression, gravity alone is not strong enough to pull the other side into full droop against the anti-roll bar. The bar attempts to keep both sides at the same height. The stiffer it is, the more you get this result.
Old 10-03-2019, 11:43 AM
  #4  
FriedEggs
Track Day
Thread Starter
 
FriedEggs's Avatar
 
Join Date: Dec 2018
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Christian Plyler
The anti-roll bars cause this specifically.

When one side is in compression, gravity alone is not strong enough to pull the other side into full droop against the anti-roll bar. The bar attempts to keep both sides at the same height. The stiffer it is, the more you get this result.
Interesting, it docent bother me but its a new trick for sure. I wonder how much impact sport mode has on it? I usually keep it in sport unless I'm on the interstate
Old 10-03-2019, 11:45 AM
  #5  
GrantG
Addict
Rennlist Member

 
GrantG's Avatar
 
Join Date: Jun 2002
Location: Denver
Posts: 17,892
Received 4,825 Likes on 2,746 Posts
Default

Originally Posted by FriedEggs
Interesting, it docent bother me but its a new trick for sure. I wonder how much impact sport mode has on it? I usually keep it in sport unless I'm on the interstate
Has nothing to do with Sport mode. All stiff 911's do this (including my 1973 model which definitely does not have PASM)...
Old 10-03-2019, 11:46 AM
  #6  
FriedEggs
Track Day
Thread Starter
 
FriedEggs's Avatar
 
Join Date: Dec 2018
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by GrantG
Has nothing to do with Sport mode. All stiff 911's do this...
Do most drive in sport mode all the time? I like the more ridged feel but its not getting me anywhere faster. I have seen no downside to it?
Old 10-03-2019, 12:18 PM
  #7  
GrantG
Addict
Rennlist Member

 
GrantG's Avatar
 
Join Date: Jun 2002
Location: Denver
Posts: 17,892
Received 4,825 Likes on 2,746 Posts
Default

Originally Posted by FriedEggs
Do most drive in sport mode all the time? I like the more ridged feel but its not getting me anywhere faster. I have seen no downside to it?
I only use Sport Chassis mode at the track, but feel free to use whatever setting you prefer. Sport Chassis mode only controls the damping of the shocks - the ride height, stiffness of the springs, and stiffness of the swaybars is unaffected by the button (which is what causes the tripod effect).
Old 10-03-2019, 12:29 PM
  #8  
Alan C.
Rennlist Member
 
Alan C.'s Avatar
 
Join Date: Jun 2001
Location: Ohio
Posts: 9,431
Received 1,016 Likes on 522 Posts
Default

It's due to a torsionally stiff body and limited drop in the suspension.
Old 10-03-2019, 01:02 PM
  #9  
GrantG
Addict
Rennlist Member

 
GrantG's Avatar
 
Join Date: Jun 2002
Location: Denver
Posts: 17,892
Received 4,825 Likes on 2,746 Posts
Default

Originally Posted by Alan C.
It's due to a torsionally stiff body and limited drop in the suspension.
The limited drop in the suspension on the airborne side is only because the opposite side is compressed and the swaybars connect the two sides. When the car is on a lift (swaybars only act when the two sides have a differential force), the drop in the suspension is pretty normal...
Old 10-03-2019, 03:34 PM
  #10  
Christian Plyler
Racer
 
Christian Plyler's Avatar
 
Join Date: Sep 2019
Posts: 297
Likes: 0
Received 85 Likes on 48 Posts
Default

Yeah, I guess one would have to say that a tornsionally stiff chassis, in conjunction with stiff anti-roll bar, is what does it.

After all, if the whole chassis just twisted in the middle, both sides could touch regardless of the anti-roll bar.

So it's a product of both.
Old 10-03-2019, 03:50 PM
  #11  
GrantG
Addict
Rennlist Member

 
GrantG's Avatar
 
Join Date: Jun 2002
Location: Denver
Posts: 17,892
Received 4,825 Likes on 2,746 Posts
Default

Originally Posted by Christian Plyler
Yeah, I guess one would have to say that a tornsionally stiff chassis, in conjunction with stiff anti-roll bar, is what does it.

After all, if the whole chassis just twisted in the middle, both sides could touch regardless of the anti-roll bar.

So it's a product of both.
I think we beat that question into submission - any other good ones (slow day at work)?
Old 10-03-2019, 04:05 PM
  #12  
Christian Plyler
Racer
 
Christian Plyler's Avatar
 
Join Date: Sep 2019
Posts: 297
Likes: 0
Received 85 Likes on 48 Posts
Default

Any other good ones? Um....

Why do most women have one breast sliiiiiiiiiiiiiiiiiiightly droopier than the other? Do they need anti-roll bar or corner balance?
Old 10-03-2019, 04:06 PM
  #13  
GrantG
Addict
Rennlist Member

 
GrantG's Avatar
 
Join Date: Jun 2002
Location: Denver
Posts: 17,892
Received 4,825 Likes on 2,746 Posts
Default

Originally Posted by Christian Plyler
Any other good ones? Um....

Why do most women have one breast sliiiiiiiiiiiiiiiiiiightly droopier than the other? Do they need anti-roll bar or corner balance?
Difficult to answer without illustrations
Old 10-03-2019, 04:12 PM
  #14  
Christian Plyler
Racer
 
Christian Plyler's Avatar
 
Join Date: Sep 2019
Posts: 297
Likes: 0
Received 85 Likes on 48 Posts
Default

Originally Posted by GrantG
Difficult to answer without illustrations

Checked my wife's service manual... does not contain any. You know how sometimes you get instructions for something, and they're obviously translated from some Asian language, and very poorly? My wife's is like that. It's very frustrating.

And none of the dealers around here are willing to work on her.
Old 10-03-2019, 04:15 PM
  #15  
GrantG
Addict
Rennlist Member

 
GrantG's Avatar
 
Join Date: Jun 2002
Location: Denver
Posts: 17,892
Received 4,825 Likes on 2,746 Posts
Default

Originally Posted by Christian Plyler
Checked my wife's service manual... does not contain any. You know how sometimes you get instructions for something, and they're obviously translated from some Asian language, and very poorly? My wife's is like that. It's very frustrating.

And none of the dealers around here are willing to work on her.


Quick Reply: 3 wheel rid'in RS



All times are GMT -3. The time now is 08:55 AM.