Bilstein B6s and B8s - Page 5 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DSOmegaX · 05-07-2014, 04:00 AM

Looking to grab a set of the B8 to pair with my STi pink springs within the month. Since the two companies are close partners in both street and motorsport, should be a natural pairing.

nyfries · 05-07-2014, 04:03 AM

Quote:

Originally Posted by DSOmegaX

Looking to grab a set of the B8 to pair with my STi pink springs within the month. Since the two companies are close partners in both street and motorsport, should be a natural pairing.

Do report back

DSOmegaX · 05-09-2014, 07:10 AM

Quote:

Originally Posted by nyfries

Do report back

Actually never mind. Ended up ordering the Bilstein dampers off the BRZ tS

mike156 · 05-09-2014, 12:48 PM

You guys should do some more research before you post "information." It took about 5 minutes on the phone with Bilstein to get this information.

Here are the specs for the B6 and B8.

Front (B6/B8)
Length [Extended] - 18.95/18.17
Length [Collapsed] - 15.9/15.9
Valving [Rebound] - 179/179
Valving [Comp] - 116/116

Rear (B6/B8)
Length [Extended] - 15.45/14.66
Length [Collapsed] - 10.7/10.7
Valving [Rebound] - 141/141
Valving [Comp] - 70/70

The ONLY difference in specs is the extended length. Now, there could be differences in the valving curves at the low end but they end up at the same place at the high end where they take the specification from....but I doubt it.

If you are using springs that are wound to stay captive on the stock struts, IMO there is no reason to get the B8s over the B6s as they will simply reduce droop travel. If you are using springs that rattle around on stock struts...well, they are probably crappy springs and you should get different springs? Point is, the B8s absolutely do not increase compression travel and any spring that's a bad idea on a stock length strut is still a bad idea on the B8s.

simpleisbest · 05-09-2014, 05:41 PM

Quote:

Originally Posted by mike156

You guys should do some more research before you post "information." It took about 5 minutes on the phone with Bilstein to get this information.

Here are the specs for the B6 and B8.

Front (B6/B8)
Length [Extended] - 18.95/18.17
Length [Collapsed] - 15.9/15.9
Valving [Rebound] - 179/179
Valving [Comp] - 116/116

Rear (B6/B8)
Length [Extended] - 15.45/14.66
Length [Collapsed] - 10.7/10.7
Valving [Rebound] - 141/141
Valving [Comp] - 70/70

The ONLY difference in specs is the extended length. Now, there could be differences in the valving curves at the low end but they end up at the same place at the high end where they take the specification from....but I doubt it.

If you are using springs that are wound to stay captive on the stock struts, IMO there is no reason to get the B8s over the B6s as they will simply reduce droop travel. If you are using springs that rattle around on stock struts...well, they are probably crappy springs and you should get different springs? Point is, the B8s absolutely do not increase compression travel and any spring that's a bad idea on a stock length strut is still a bad idea on the B8s.

Do you have the units of measure for the compression and rebound specs?

mike156 · 05-09-2014, 09:04 PM

Its the same as all the non-circle track Bilstein stuff.

N/10 @ 0.52m/s
(i.e. 179 = 1790N @ 0.52m/s)

Although, as I mentioned, this is only one point on the curve, it could be doing all kinds of different things below and above that shaft speed and you'd have no idea if two shocks with the same number actually had the same damping.

05-07-2014, 04:00 AM	#57
DSOmegaX Senior Member Join Date: Jul 2012 Drives: '19 M2 Comp, '20 GR Supra Location: Irvine, CA Posts: 1,904 Thanks: 109 Thanked 2,153 Times in 986 Posts Mentioned: 51 Post(s) Tagged: 3 Thread(s)	Looking to grab a set of the B8 to pair with my STi pink springs within the month. Since the two companies are close partners in both street and motorsport, should be a natural pairing. __________________ @dsomegax.cars 2013 Subaru BRZ Limited \| WRB \| STI tS Build Thread [SOLD] 2019 BMW M2 Competition \| LBB \| ///M Performance Build Thread 2020 Toyota GR Supra \| Turbulence \| TRD \| Build Thread

05-09-2014, 12:48 PM	#60
mike156 Member Join Date: Mar 2013 Drives: EVO Location: Utah Posts: 75 Thanks: 3 Thanked 49 Times in 26 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	You guys should do some more research before you post "information." It took about 5 minutes on the phone with Bilstein to get this information. Here are the specs for the B6 and B8. Front (B6/B8) Length [Extended] - 18.95/18.17 Length [Collapsed] - 15.9/15.9 Valving [Rebound] - 179/179 Valving [Comp] - 116/116 Rear (B6/B8) Length [Extended] - 15.45/14.66 Length [Collapsed] - 10.7/10.7 Valving [Rebound] - 141/141 Valving [Comp] - 70/70 The ONLY difference in specs is the extended length. Now, there could be differences in the valving curves at the low end but they end up at the same place at the high end where they take the specification from....but I doubt it. If you are using springs that are wound to stay captive on the stock struts, IMO there is no reason to get the B8s over the B6s as they will simply reduce droop travel. If you are using springs that rattle around on stock struts...well, they are probably crappy springs and you should get different springs? Point is, the B8s absolutely do not increase compression travel and any spring that's a bad idea on a stock length strut is still a bad idea on the B8s. Last edited by mike156; 05-09-2014 at 01:38 PM.

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05-09-2014, 09:04 PM	#62
mike156 Member Join Date: Mar 2013 Drives: EVO Location: Utah Posts: 75 Thanks: 3 Thanked 49 Times in 26 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Its the same as all the non-circle track Bilstein stuff. N/10 @ 0.52m/s (i.e. 179 = 1790N @ 0.52m/s) Although, as I mentioned, this is only one point on the curve, it could be doing all kinds of different things below and above that shaft speed and you'd have no idea if two shocks with the same number actually had the same damping.

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