BC

What to say? These are new, and paired with the 600 fronts and 400 rears of the hypercoils. The variance between shocks is normal, ProParts said, and I can expect quite a bit of life out of these.

Do these charts mean anything to anybody? Can they tell me anything about how to tune the rebound to the car and springs?

Tony

How many pounds of boost are you running Pretty flat curve...yadda yadda

Never seen such a chart...thanks for sharing! Where did you get it done?

how $$

BC

Hey Tony - Proparts - in Canoga Park, CA - up from LA. Dyno curves come after "some assembly required," It was 100 bucks for all four shocks to be dynoed. I'm not sure why I did it now, other than to say I did it because Bill Ball had all those issues with his konis. Ride problems, jacking, etc. I want to avoid that. So per specs, these are "acting" properly.

He said that while they will last for a long time (though 50,000 miles as a wear point drop out was mentioned) that they should be checked every year.

Fabio421

I would think that the people who dyno'd them would be the best ones to explain how the chart can help you.

It is cool that you did this though. I have heard of it but never seen a dyno chart.

Bill Ball

I'll have to dig out my charts. Yours look much different than I recall. Yours are closer to what you want to see. Mine we almost new Konis, used only a couple of months, and the curves were awful. Those shocks are sitting on my garage floor. I'd be ashamed to sell them to anyone.

BC

Well, Bill, can you dig that up and post it here? I for one would appreciate that. I remember some curves on yours, but not clearly. My photographic memory is failing I guess, or I never had it in the first place. Your fiasco, as I mentioned, is the exact reason I did this.

Fabio - the company that did this test simply said they look just fine, and are well within spec, and that there is no need to "break in" the shock at half setting. The 10% variance in curves between shocks is no big deal, but I may wish to pay closer attention to where they end up on the car if I notice any anomolies in the way they handle. He said that if I get wierd results with my setup and want to switch stuff around, its a bit less than 200 a shock for external adjustment and a rebuild/revalve to what I want, but the 600/400 is well within the limits of this shock.

ceedee

i like your new avatar fabio... really creative
what happened to the pic with the BIG *****?btw

Bill Ball

Here are my charts. This is a different kind of analysis. Actually he produced about 15 charts on each shock. These are representative. It shows the min and max range (rebound damping). Even an idiot can tell you there is hardly any adjustability in the shocks. Notice how straight and low the curves are. A "nose" or ramp up in damping would be better. The tester went through a whole discussion with me, but I can't recall much of the interpretation other than he thought the shocks were terribly underdamped for my spring rate.

IcemanG17

Hmm
Assuming your top graph is front shocks and bottom is rears.....it looks like they could only control 500lb springs front and 200 lb rears? Or am I reading the graphs wrong (distinctly possible)

Tommy928

Looking at Bill's charts I would suspect they were soft in ride and handling, but very hard at expension joints types impacts. For good body control (like for cornering and road dips) one needs high damping at low stroke volocity. The charts showed little damping at low volocities indicating soft willowing ride and handling. The relatively high damping at higher volocities point to a rather harsh ride.

mark kibort

Bill, what koni's are those. Devek Level II?? did you upgrade? what ever happened to the shock/spring combo issue you had at high speed.
I forgot to ask you when i saw you at Sears Point.

This all is still a little voodo-ish. i should probably get mine dynoed and then revalve my devek levelII set up to be set where it is, but the settings to be at the middle, rather than how they are, maxed out right now. ive never adjusted the level II stuff since i installed it 8 years ago!!!!!!

mk


Mk

a4sfed928

The two sets of graphs are not comparable due to the fact that force is plotted against displacement on the first set and against velocity on the second set.

Giovanni

Heheh, what else can you get dynoed these days? Windshield, speakers, gauges?

Bill Ball

EXACTLY. Deplorable handling, and these are new replacements I got from Koni. The original Konis I got from DEVEK were worse than that. The day I put them on I knew something was way wrong. They were setup by Marc. The ride was like a bad Cadillac. I complained and got no satisfaction. I suffered with them for almost 3 years. I adjusted them to near full hard rebound and all that happend was the ride got harsher but bump control was no better. So, I called Koni and they were happy to replace them. The replacements, dyno'd above, were better but still not very good. So, I removed them, had them dyno'd as shown above, and put them in the corner of the garage, totally disgusted. I now have Bilsteins with my stock springs and I am very happy with the ride and handling.

Bill Ball

Correct.