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Author Topic: the problem with single adjustable shocks  (Read 1424 times)
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Fifth Gear
Posts: 524

« on: February 11, 2008, 06:59:20 PM »

I've been having some difficulties getting used to my Koni adjustables.  I've had a couple of track days and have not yet been able to balance the car in the way that I'd hoped.

The problem for single adjustable shocks is that the compression dampening is linked to the rebound dampening.  

In looking at other shocks I was told that the Tokico's dampening was heavily biased to compression, in other words when you turn up the dial you get more compression dampening than rebound dampening... which is a nice way to compensate for the low spring rate of a stock spring.

I've got higher spring rates than stock.   I chose the Koni's because they were supposed to have more of a rebound bias, (when you turn up the dial you get more rebound dampening than compression dampening)... which would be more appropriate for a higher spring rate.  Unfortunately I have not found this to be so... at least there's not enough rebound bias to make reasonable changes to cornering transitions to tune the car as you would with a double adjustable shock.  

What you want to start out with is a spring/shock package that roughly gives you as much compression dampening as it does rebound dampening. A neutral set-up that you can then alter to tune for your own style/handling needs.

When you go up in spring rate, then you'll need less compression and more rebound dampening to keep it balanced. I haven't been able to get there with the Koni's.  The shock dials in too much compression and not enough rebound to adequately effect the handling change that I was expecting.

I think that a better option will be to go for a fixed valved shock, something like a Spec Miata Bilstien -20%.  

Anyone want to buy some low mileage Koni's?
I love humanity. It's people I can't stand!
Fifth Gear
Posts: 4758

2005 MSM Ti #1255

« Reply #1 on: February 11, 2008, 08:05:10 PM »

That's quite a sales pitch!  Stand back and wait for the offers to rebound in (with little to no compression dampening)! Smiley

Hydra Nemesis; 550 injectors; Flying Miata Full Intake Kit w/MBC (MAFless) & GFB recirculating bypass valve; Flying Miata DP; Flying Miata Full Exhaust; FMIC 28X7X2.5; Fat Cat Motorsports Elites (single adjustable) 800/500; Racing Beat 1.25" Tubular Front Sway bar w/Brace Kit and Gearheads Gauge Adjustable endlinks; OEM 14mm rear sway bar; FM Frame Rails; HDHCDDHT Rollbar; Hard Dog Harness Bar; G-Force 6-Point Pull-Down Camlock Harness; Ultrashield Rally Sport Seat; Energy Suspension Diff Bushings; Carbotech XP10/XP8 Brake Pads;  Stainless Steel Brake Lines; 15X9 6ULS (Nickel) & BF Goodrich g-Force Rival (225/45/15) street; 15X9 6ULS (Nickel) & Hoosier A6 (275/35/15) track; 15X9 6ULS (Nickel) & Hoosier H2O (225/45/15) wet track; Stewart-Warner Boost Gauge; Thompson Nautilus Air Horn; Mobile 1 0W-30; Redline MT90; Redline 75W90; BEL-tronics Pro RX65. 1/20/08 190.06 HP @ 178.36 Max Torque (Need a new Dyno run because this is inaccurate with current mods!)
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