PSS9 and PSS10 - spring rates & valving figures from Bilstein
#1
PSS9 and PSS10 - spring rates & valving figures from Bilstein
I found a lot of misinformation on these coilvers, so after numerous calls to Bilstein, I finally got the correct figures from them for all the 996 AWD PSSx coilovers. Here they are:
PART NUMBERS:
PSS9:
C2 - F4-GM5-8846-H0
C4/(C4S) - F4-GM5-8848-H0
Turbo/(GT2) - F4-GM5-8877-H0
(Some builds will be H1)
PSS10:
Turbo/(GT2) - F4-GM5-D536-H0
SPRING RATES:
8848/8877/D536:
f: 260 lbs/in main, 145 lbs/in tender -- r :515 lbs/in main, 145 lbs/in tender
Initial combined rates w/o static sag:
f: 93 lbs/in -- r: 113 lbs/in
Final rates before main coils close:
f: 260 lbs/in -- r: 515 lbs/in
VALVING: (max force)
8848 (PSS9):
9 = soft/adjuster open, 1 == hard/adjuster closed
Rebound (in N):
f: 9=1465, 1=2050 -- r: 9=2150, 1=2820
Compression (in N):
f: 9=935, 1/1=1410 -- r: 9=1310, 1=1530
-- Max Spring Rates supported w/o revalving:
f: 350 lbs/in main -- r: 650 lbs/in main (6.3kg/mm -- 11.6kg/mm)
8877 (PSS9):
9 = soft/adjuster open, 1 == hard/adjuster closed
Rebound (in N):
f: 9=1700, 1=2775 -- r: 9=2270, 1=3060
Compression (in N):
f: 9=1050, 1=1695 -- r: 9=1420, 1=1800
-- Max Spring Rates supported w/o revalving:
f: 375 lbs/in main -- r: 700 lbs/in main (6.7kg/mm -- 12.5kg/mm)
D536 (PSS10):
1 = soft/adjuster open, 10 == hard/adjuster closed
Rebound (in N):
f: 1=1700, 10=2775 -- r: 1=2270, 10=3060
Compression (in N):
f: 1=1050, 10=1695 -- r: 1=1420, 10=1800
-- Max Spring Rates supported w/o revalving:
f: 375 lbs/in main -- r: 700 lbs/in main (6.7kg/mm -- 12.5kg/mm)
Bilstein will revalve each strut for $125.
It would be interesting to compare valving data and spring rates for other shock models too, if anyone has that data.
Instructions:
gm5-8848_C4 Manual
gm5-8877_Turbo Manual
Images:
1) (left) front turbo, (right) front C4
2) (left) rear turbo, (right) rear C4
PART NUMBERS:
PSS9:
C2 - F4-GM5-8846-H0
C4/(C4S) - F4-GM5-8848-H0
Turbo/(GT2) - F4-GM5-8877-H0
(Some builds will be H1)
PSS10:
Turbo/(GT2) - F4-GM5-D536-H0
SPRING RATES:
8848/8877/D536:
f: 260 lbs/in main, 145 lbs/in tender -- r :515 lbs/in main, 145 lbs/in tender
Initial combined rates w/o static sag:
f: 93 lbs/in -- r: 113 lbs/in
Final rates before main coils close:
f: 260 lbs/in -- r: 515 lbs/in
VALVING: (max force)
8848 (PSS9):
9 = soft/adjuster open, 1 == hard/adjuster closed
Rebound (in N):
f: 9=1465, 1=2050 -- r: 9=2150, 1=2820
Compression (in N):
f: 9=935, 1/1=1410 -- r: 9=1310, 1=1530
-- Max Spring Rates supported w/o revalving:
f: 350 lbs/in main -- r: 650 lbs/in main (6.3kg/mm -- 11.6kg/mm)
8877 (PSS9):
9 = soft/adjuster open, 1 == hard/adjuster closed
Rebound (in N):
f: 9=1700, 1=2775 -- r: 9=2270, 1=3060
Compression (in N):
f: 9=1050, 1=1695 -- r: 9=1420, 1=1800
-- Max Spring Rates supported w/o revalving:
f: 375 lbs/in main -- r: 700 lbs/in main (6.7kg/mm -- 12.5kg/mm)
D536 (PSS10):
1 = soft/adjuster open, 10 == hard/adjuster closed
Rebound (in N):
f: 1=1700, 10=2775 -- r: 1=2270, 10=3060
Compression (in N):
f: 1=1050, 10=1695 -- r: 1=1420, 10=1800
-- Max Spring Rates supported w/o revalving:
f: 375 lbs/in main -- r: 700 lbs/in main (6.7kg/mm -- 12.5kg/mm)
Bilstein will revalve each strut for $125.
It would be interesting to compare valving data and spring rates for other shock models too, if anyone has that data.
Instructions:
gm5-8848_C4 Manual
gm5-8877_Turbo Manual
Images:
1) (left) front turbo, (right) front C4
2) (left) rear turbo, (right) rear C4
Last edited by itacud; 07-16-2008 at 01:29 AM.
#3
Thanks, I updated the post to try and make that clearer, and added new spring rate data, from Bilstein, that's valving specific.
#7
That's funny. When I called Bilstein some months ago trying to get stiffer springs, they told me there weren't any. So I bought a set of Motons instead of trying to upgrade my PSS9's. Re-springing and re-valving the Bilsteins will be more cost effective for those who choose to do it.
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#12
Thanks for this info!
Adding detail from inside the instruction manual that is not easily found by Googling:
996TT PSS9 Instructions note part numbers of individual items (which is what you'll see when you look at your parts and try to figure out if it's right or not):
Front:
E4-FD1-Y623A00 - Main Spring
E4-FD1-Z349A00 - Helper Spring
VM3-A012 - Shock Absorber (The full p/n on my rear shock says: F4-VM3-A012-H0 )
Rear:
E4-FD1-Y518A00 - Main Spring
E4-FD1-Y504A01 - Helper Spring
BM5-A013 - Shock Absorber (The full p/n on my rear shock says: F4-BM5-A013-H0 )
Adding detail from inside the instruction manual that is not easily found by Googling:
996TT PSS9 Instructions note part numbers of individual items (which is what you'll see when you look at your parts and try to figure out if it's right or not):
Front:
E4-FD1-Y623A00 - Main Spring
E4-FD1-Z349A00 - Helper Spring
VM3-A012 - Shock Absorber (The full p/n on my rear shock says: F4-VM3-A012-H0 )
Rear:
E4-FD1-Y518A00 - Main Spring
E4-FD1-Y504A01 - Helper Spring
BM5-A013 - Shock Absorber (The full p/n on my rear shock says: F4-BM5-A013-H0 )
Last edited by MarkP; 06-26-2011 at 03:04 PM.
#13
So it doesn't look like there is any difference between the off the shelf PSS9 Ann PSS10 except that you have 9 vs. 10 clicks of adjustment. The rates and valving are exactly identical. Whats weird is that the instructions specify slightly different ride heights for the 9s vs. the 10s.
#15
I found a lot of misinformation on these coilvers, so after numerous calls to Bilstein, I finally got the correct figures from them for all the 996 AWD PSSx coilovers. Here they are:
PART NUMBERS:
PSS9:
C2 - F4-GM5-8846-H0
C4/(C4S) - F4-GM5-8848-H0
Turbo/(GT2) - F4-GM5-8877-H0
(Some builds will be H1)
PSS10:
Turbo/(GT2) - F4-GM5-D536-H0
SPRING RATES:
8848/8877/D536:
f: 260 lbs/in main, 145 lbs/in tender -- r :515 lbs/in main, 145 lbs/in tender
Initial combined rates w/o static sag:
f: 93 lbs/in -- r: 113 lbs/in
Final rates before main coils close:
f: 260 lbs/in -- r: 515 lbs/in
VALVING: (max force)
8848 (PSS9):
9 = soft/adjuster open, 1 == hard/adjuster closed
Rebound (in N):
f: 9=1465, 1=2050 -- r: 9=2150, 1=2820
Compression (in N):
f: 9=935, 1/1=1410 -- r: 9=1310, 1=1530
-- Max Spring Rates supported w/o revalving:
f: 350 lbs/in main -- r: 650 lbs/in main (6.3kg/mm -- 11.6kg/mm)
8877 (PSS9):
9 = soft/adjuster open, 1 == hard/adjuster closed
Rebound (in N):
f: 9=1700, 1=2775 -- r: 9=2270, 1=3060
Compression (in N):
f: 9=1050, 1=1695 -- r: 9=1420, 1=1800
-- Max Spring Rates supported w/o revalving:
f: 375 lbs/in main -- r: 700 lbs/in main (6.7kg/mm -- 12.5kg/mm)
D536 (PSS10):
1 = soft/adjuster open, 10 == hard/adjuster closed
Rebound (in N):
f: 1=1700, 10=2775 -- r: 1=2270, 10=3060
Compression (in N):
f: 1=1050, 10=1695 -- r: 1=1420, 10=1800
-- Max Spring Rates supported w/o revalving:
f: 375 lbs/in main -- r: 700 lbs/in main (6.7kg/mm -- 12.5kg/mm)
Bilstein will revalve each strut for $125.
It would be interesting to compare valving data and spring rates for other shock models too, if anyone has that data.
Instructions:
gm5-8848_C4 Manual
gm5-8877_Turbo Manual
Images:
1) (left) front turbo, (right) front C4
2) (left) rear turbo, (right) rear C4
PART NUMBERS:
PSS9:
C2 - F4-GM5-8846-H0
C4/(C4S) - F4-GM5-8848-H0
Turbo/(GT2) - F4-GM5-8877-H0
(Some builds will be H1)
PSS10:
Turbo/(GT2) - F4-GM5-D536-H0
SPRING RATES:
8848/8877/D536:
f: 260 lbs/in main, 145 lbs/in tender -- r :515 lbs/in main, 145 lbs/in tender
Initial combined rates w/o static sag:
f: 93 lbs/in -- r: 113 lbs/in
Final rates before main coils close:
f: 260 lbs/in -- r: 515 lbs/in
VALVING: (max force)
8848 (PSS9):
9 = soft/adjuster open, 1 == hard/adjuster closed
Rebound (in N):
f: 9=1465, 1=2050 -- r: 9=2150, 1=2820
Compression (in N):
f: 9=935, 1/1=1410 -- r: 9=1310, 1=1530
-- Max Spring Rates supported w/o revalving:
f: 350 lbs/in main -- r: 650 lbs/in main (6.3kg/mm -- 11.6kg/mm)
8877 (PSS9):
9 = soft/adjuster open, 1 == hard/adjuster closed
Rebound (in N):
f: 9=1700, 1=2775 -- r: 9=2270, 1=3060
Compression (in N):
f: 9=1050, 1=1695 -- r: 9=1420, 1=1800
-- Max Spring Rates supported w/o revalving:
f: 375 lbs/in main -- r: 700 lbs/in main (6.7kg/mm -- 12.5kg/mm)
D536 (PSS10):
1 = soft/adjuster open, 10 == hard/adjuster closed
Rebound (in N):
f: 1=1700, 10=2775 -- r: 1=2270, 10=3060
Compression (in N):
f: 1=1050, 10=1695 -- r: 1=1420, 10=1800
-- Max Spring Rates supported w/o revalving:
f: 375 lbs/in main -- r: 700 lbs/in main (6.7kg/mm -- 12.5kg/mm)
Bilstein will revalve each strut for $125.
It would be interesting to compare valving data and spring rates for other shock models too, if anyone has that data.
Instructions:
gm5-8848_C4 Manual
gm5-8877_Turbo Manual
Images:
1) (left) front turbo, (right) front C4
2) (left) rear turbo, (right) rear C4
Thanks this is great info.