Boxster Racers Spring Rate Changes - Experience
11-22-2010, 10:43 PM
#1
Pro
Thread Starter
Join Date: Feb 2007
Posts: 734
Likes: 0
Received 0 Likes
on
0 Posts
Boxster Racers Spring Rate Changes - Experience
I am looking to speak with other folks who have Boxsters that they are racing (or even Caymans) and have changed their spring rates. From memory, I believe the Spec Boxster's are running 450# F and 500# R, is that correct? If so has anyone tried 600 F and 700 R or any other combination?
Regarding the Cayman Interseries, does anyone know what spring rates they are using front to rear?
Now I know in a perfect world we boxster and cayman drivers would be changing spring rates based on the track we go to (higher for smooth, lower for bumpy) but I doubt many are changing them for different tracks. Like me i think its "run what you brung" regarding spring rates.
What have you seen, used, and like.
Regarding the Cayman Interseries, does anyone know what spring rates they are using front to rear?
Now I know in a perfect world we boxster and cayman drivers would be changing spring rates based on the track we go to (higher for smooth, lower for bumpy) but I doubt many are changing them for different tracks. Like me i think its "run what you brung" regarding spring rates.
What have you seen, used, and like.
11-22-2010, 11:13 PM
#2
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
__________________
2016 GT4-R
Rick DeMan
DeMan Motorsport
Upper Nyack, NY
845 727 3070
Porsche Sales & Service
Porsche Race services and parts
www.DeManMotorsport.com
2016 GT4-R
Rick DeMan
DeMan Motorsport
Upper Nyack, NY
845 727 3070
Porsche Sales & Service
Porsche Race services and parts
www.DeManMotorsport.com
11-23-2010, 05:10 PM
#3
Nordschleife Master
Join Date: Oct 2004
Location: Vacuuming Cal Speedway
Posts: 7,306
Likes: 0
Received 7 Likes
on
5 Posts
Rick I think you scared everyone away from reponding 
...
OK so I ran the 08' season in a Spec Box with the spec 450/500 springs and PSS9's. The stock shocks were the limiting factor in the SB's, they really aren't suited to the task. The PSS10's when revalved for 700/900 springs (996 Spec) are a completely different shock and very raceable....
Your Boxster with the 3.6, big wing, and hopefully some real racing shocks could easily stand more spring than the SB's. I would suggest you try it incrementally, what rates are you running now and with what shocks?
...OK so I ran the 08' season in a Spec Box with the spec 450/500 springs and PSS9's. The stock shocks were the limiting factor in the SB's, they really aren't suited to the task. The PSS10's when revalved for 700/900 springs (996 Spec) are a completely different shock and very raceable....
Your Boxster with the 3.6, big wing, and hopefully some real racing shocks could easily stand more spring than the SB's. I would suggest you try it incrementally, what rates are you running now and with what shocks?
11-23-2010, 07:09 PM
#4
Pro
Thread Starter
Join Date: Feb 2007
Posts: 734
Likes: 0
Received 0 Likes
on
0 Posts
I have been running PSS9's with 450/500. I am installing Moton's as we speak and am thinking of changing rates to 700/900. But before I purchase new springs I thought I'd ask some of the folks who have tried different rates. I'd like to hear from Rick....what say you
Trending Topics
11-23-2010, 08:10 PM
#8
Nordschleife Master
Join Date: Oct 2004
Location: Vacuuming Cal Speedway
Posts: 7,306
Likes: 0
Received 7 Likes
on
5 Posts
My wrench is currently building a 3.8- 99' boxster for a client. They expect it to weigh in around 2600 w/200lb. driver (honest). I just called and they're starting with 750/900 springs . He doesn't think you need a 200lb differential between front and rear on a boxster platform, perhaps only 100 as the balance is more evenly split. Lots of testing to follow....
11-24-2010, 08:50 AM
#11
Rennlist
Basic Site Sponsor
Basic Site Sponsor
How come the guys who have built Boxsters/Caymans are just eating popcorn?
__________________
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
11-24-2010, 10:18 AM
#13
I'm in....
Rennlist Member
Rennlist Member
11-24-2010, 10:41 AM
#14
GT3 player par excellence
Lifetime Rennlist
Member
Lifetime Rennlist
Member
11-24-2010, 11:14 AM
#15
I am looking to speak with other folks who have Boxsters that they are racing (or even Caymans) and have changed their spring rates. From memory, I believe the Spec Boxster's are running 450# F and 500# R, is that correct? If so has anyone tried 600 F and 700 R or any other combination?
Regarding the Cayman Interseries, does anyone know what spring rates they are using front to rear?
Now I know in a perfect world we boxster and cayman drivers would be changing spring rates based on the track we go to (higher for smooth, lower for bumpy) but I doubt many are changing them for different tracks. Like me i think its "run what you brung" regarding spring rates.
What have you seen, used, and like.
Regarding the Cayman Interseries, does anyone know what spring rates they are using front to rear?
Now I know in a perfect world we boxster and cayman drivers would be changing spring rates based on the track we go to (higher for smooth, lower for bumpy) but I doubt many are changing them for different tracks. Like me i think its "run what you brung" regarding spring rates.
What have you seen, used, and like.
Or Motons, Sachs JRZ etc...