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Brakes & Suspension Forum sponsored by The Tire Rack |
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10-27-2013, 07:11 PM | #1 |
Scooby Newbie
Member#: 81260
Join Date: Feb 2005
Chapter/Region:
BAIC
Location: SF Bay Area
Vehicle:2007 WRX Wagon Urban Gray |
Damper experts! What are the koni failure/wear modes?
I have Koni Yellow inserts on my 2007 WRX wagon with wagon sti pink springs. For the past few years, about every year, I need to turn my konis about a quarter turn firmer to maintain the ride I'm looking for. If I don't the car starts feeling a bit disconnected and bouncy and isn't as fun to drive, but after the turn, everything seems to go back to normal. I've read that this is not uncommon for Koni yellows, but it still seems strange to me. The shocks aren't failing, but something much be wearing or changing, that makes the shock a bit weak. Then that problem is mitigated by firming up the shock. Does anyone know what's going on inside the damper?
Thanks!
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10-28-2013, 03:59 AM | #2 |
Scooby Guru
Member#: 126441
Join Date: Sep 2006
Chapter/Region:
SCIC
Location: TPE
Vehicle:03 bugeye |
have you marked the konis/strut top orientation to see if the valve is turning over time by itself?
I noticed my konis settings sometimes change after time and I have to re-adjust them |
10-30-2013, 01:46 AM | #3 | |
Scooby Newbie
Member#: 81260
Join Date: Feb 2005
Chapter/Region:
BAIC
Location: SF Bay Area
Vehicle:2007 WRX Wagon Urban Gray |
Quote:
BTW, it's interesting to me that I can tell the difference easily between .125 turns (that is, one setting will be perfect, and an 1/8th turn too much will be noticeably too stiff and an 1/8th turn too little will be relatively uncontrolled.) I wonder if anyone else adjusts that finely. |
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11-02-2013, 04:21 PM | #4 | |
Scooby Newbie
Member#: 324832
Join Date: Jul 2012
Chapter/Region:
MWSOC
Location: STL, MO
Vehicle:2008 WRX WRB |
The Autocross to Win book mentions Koni adjustment being pretty nonlinear and sensitive:
Quote:
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11-04-2013, 02:14 PM | #5 |
Scooby Newbie
Member#: 81260
Join Date: Feb 2005
Chapter/Region:
BAIC
Location: SF Bay Area
Vehicle:2007 WRX Wagon Urban Gray |
Cool, thanks for the info.
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11-04-2013, 07:14 PM | #6 |
Scooby Guru
Member#: 71875
Join Date: Oct 2004
Location: Montana
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Sounds like they could use a rebuild or new fluid and seals. Over time the fluid will wear out and break down, and the viscosity will drop. So you need a tighter shim/smaller orifice to get the same force.
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