RS too much downforce?? Yes or no?
10-15-2015, 10:25 PM
#1
Race Director
Thread Starter
http://www.worldcarfans.com/11510129...-has-downforce
http://yoursinglesourcefornews.com/p...-awaited/3609/
http://yoursinglesourcefornews.com/p...-awaited/3609/
Last edited by STG; 10-15-2015 at 10:46 PM.
10-15-2015, 10:31 PM
#2
RL Community Team
Rennlist Member
Rennlist Member
Known issue in these parts.
10-15-2015, 11:06 PM
#4
Rennlist Member
Join Date: Feb 2006
Location: Wishing I Was At The Track
Posts: 13,520
Received 1,729 Likes
on
916 Posts
Just regurgitating what they're reading on the forums.
Some rubbing was accepted to fit more tire. Contrary to what some of these articles are saying, those with serious rubbing issues to date have all changed alignment, specifically adding more negative camber. Any camber change by default changes caster. If caster is not returned to specs tires will rub. 997.2 RS was sensitive to this as well so you can imagine how easy it is to exacerbate the issue on the 991 RS with it's limited clearance.
Some rubbing was accepted to fit more tire. Contrary to what some of these articles are saying, those with serious rubbing issues to date have all changed alignment, specifically adding more negative camber. Any camber change by default changes caster. If caster is not returned to specs tires will rub. 997.2 RS was sensitive to this as well so you can imagine how easy it is to exacerbate the issue on the 991 RS with it's limited clearance.
10-16-2015, 07:19 AM
#6
Rennlist Member
Just regurgitating what they're reading on the forums.
Some rubbing was accepted to fit more tire. Contrary to what some of these articles are saying, those with serious rubbing issues to date have all changed alignment, specifically adding more negative camber. Any camber change by default changes caster. If caster is not returned to specs tires will rub. 997.2 RS was sensitive to this as well so you can imagine how easy it is to exacerbate the issue on the 991 RS with it's limited clearance.
Some rubbing was accepted to fit more tire. Contrary to what some of these articles are saying, those with serious rubbing issues to date have all changed alignment, specifically adding more negative camber. Any camber change by default changes caster. If caster is not returned to specs tires will rub. 997.2 RS was sensitive to this as well so you can imagine how easy it is to exacerbate the issue on the 991 RS with it's limited clearance.
That was super helpful. Thank you.
10-16-2015, 08:36 AM
#7
Race Car
Do think it is possible to add more negative camber and adjusting the caster to a proper value?
Trending Topics
10-16-2015, 08:43 AM
#9
Rennlist Member
Caster changes will need radius arms and/or caster pucks. Nizer is spot on
10-16-2015, 09:01 AM
#10
Rennlist Member
Join Date: Feb 2006
Location: Wishing I Was At The Track
Posts: 13,520
Received 1,729 Likes
on
916 Posts
Yup. You want either the pucks or the adj thrust arm. No need for both.
My preference is for the thrust arm but for some reason the 991 version costs more than double the 997 version, even though they look essentially the same. Perhaps the BBi guys can tell us why. Or you could just wait until Tarrett release their's and hope it's less.
Puck: http://www.tarett.com/items/996-997-...a01-detail.htm
991 Thrust Arm: http://www.kamotorsport.net/product/...t-thrust-arms/
997 Thrust Arm: http://www.kamotorsport.net/product/...le-thrust-arm/
My preference is for the thrust arm but for some reason the 991 version costs more than double the 997 version, even though they look essentially the same. Perhaps the BBi guys can tell us why. Or you could just wait until Tarrett release their's and hope it's less.
Puck: http://www.tarett.com/items/996-997-...a01-detail.htm
991 Thrust Arm: http://www.kamotorsport.net/product/...t-thrust-arms/
997 Thrust Arm: http://www.kamotorsport.net/product/...le-thrust-arm/
10-21-2015, 06:31 PM
#12
Info from LP997 (991 GT3 RS owner) on Rennteam that his Porsche dealer has received note from Porsche about existing "chassis problems on front + rear axle". Porsche working on a corrective action....
Recall soon?
Recall soon?
10-21-2015, 06:38 PM
#13
Three Wheelin'
Nope. I bet the only thing they will do is lift the car by adjusting the coilers.
