kccampro

Does anyone know the proper procedure to adjust a set of Koni 8240-1086 rear shocks? My new pair just arrived and the IKEA-like illustrated instructions are a bit unclear. Let me know if you’ve done it before… I’m lost if the shocks don’t have a little **** at the top…

jpmurphy99

I just went through the same thing and Bill Ball showed me how to adjust them. There is a 6mm hex socket at the top. You need to place a 6mm allen socket in there and push down until the shock is completely compressed (or flip it over and push the sock into the socket/wrench). Then turn the wrench counter-clockwise until you feel it catch in the cam. Then keep turning counter clockwise until you feel a stop (full soft). Form there, you have roughly 5 clockwise turns to full firm. I found that the clockwise stop didn't catch like the counter-clockwise one. IOW - you feel something but it doesn't completely stop turning. I recommend going between full soft and full firm a couple of time to make sure you've engaged the cam. I also found it easier to lay a wrench with an allen socket on the ground and push down on the schock (instead of pushing down on the wrench). Here's the instructions from Koni's website...

http://www.koni-na.com/adjustment.cfm

kccampro

Wow... well done and many thanks!

WallyP

Koni's idea was that the adjustment is primarily to compensate for wear, so take that into consideration when you first put them on. For normal street use, most folks find the softer end to be better...

Landseer

Very helpful. Have a new set, plus some 928 intl springs, from this era. FInally being installed today.

FredR

I have the Koni's up front and they are set to the middle of the three setting positions - they are mated to a set of Eibach variable rate springs that some folks reckon "do not work" too well. My setup was recommended to me by my dear friend Mr Kim Crumb who developed this package and his 928 CV is good enough for me. They have been in service for the last 17 years or so and still seem to work well but then I do not do much in the way of mileage and have probably seen about 100k km of use.

This combo is not for the feint hearted or people with loose fillings but then most of this country has been built in the 30 plus years I have lived hear and our roads are free of potholes and the likes so what works for me may well not be suited to a "Bomb Alley" road environment.

Adjustment is made with a special tool that is a hex wrench [6mm seems a reasonable size value but have never checked] mounted on the end of a tubular section about 15 inches long with a tee grip- have used it a grand total of once in 15 years when I fitted the things. I would think technology has moved on and for more specific requirements like track purposed examples better shocks may well be available at a price but for street use, occasional fast road driving and track day/auto cross events - I reckon they will still take some beating and I suspect nothing could vaguely compete with them "bang for the buck" wise.

Landseer

I've got a set of essentially new boge blacks with 3 stripe green springs on a parts car ( 84 5 spd ). I installed them in 07, but didnt ever drive it much. Other better 928s came along and got driven instead.

If the rear new konis and progressive's are too weird, then will do a swap. Glad to hear it might be stiffer and usable on good roads!

Gary Knox

I've been putting Koni shocks on German cars since 1975. Always liked them, and when installing for street/highway driving, I, set them to 25% from the soft stop toward the firm stop. I've also understood that only the 'up stroke' (rebound) is being adjusted, that the adjustment has no effect on the resistance/stiffness of the down stroke (jounce).

Gary

Landseer

Gary, I have the reds on front, they've been fine.

Rears, ok, I'll do that.

Question, would you advise using stock springs, or this new set of 928 Intl progressive's, from an old group buy or offer Mark had arranged years ago?

Gary Knox

Landseer,

I've used Konis with stock 928 and BMW 3.0 CS springs.. These were for strictly street/highway cars. I've also used them with the progressive springs for cars that were combination street/track driving. I believe I used about 35-40% rotation from full soft to full hard for the combination cars. Yes, they rode more harshly on pothole roads!!!

Good luck with the installation.

Gary