ITA240SX wrote:I'm 99.9% sure the price is just for the housings; he might be able to get you the sleeves but I'm pretty sure you'll have to pay extra for them. And yes, both the 8610 and 8611 are inserts (that's why he also makes the housing for the rear); the 8610 is rebound adjustable while the 8611 is both compression and rebound adjustable. If you were to use the standard yellows on the rear you wouldn't need a separate housing, but would still need the sleeves.
I currently have the yellows on both ends of my ITA car, but am thinking about upgrading the fronts to 8611s. I'm not sure, but I hope they can be installed in the oem housing the same way you do the yellows. I'm also not sure about how much, if any, stiffer the 86 series are than the yellows, or whether they are just a stronger shock. I was going to call Lee Grimes at Koni next week to get his opinion on the upgrade. FWIW, I've had the yellows on the race car for almost 5 years now; I installed them while it was still a street car, and they have been through numerous track days and close to 20 races and are still in great shape.
I didn't look at the original post, but I'll explain this. I only sell the housings, so you'd need to source the dampers and GC setup. The damper (86 series insert in this case) is just as you said. The 8610 is single adjustable (rebound), and the 8611 is double adjustable (rebound/compression).
The 86** series dampers require a gland nut to retain them in the housing. So unless you have a REALLY big tap, you can't use the factory housings like a standard Koni Yellow. (I have said really big tap for sale if someone really wants to give it a go...)
The Yellows are a linear valving setup, while the both of the 86** series are digressive valved. It gives you more compression at low speeds, which offers more control and less roll. The damping is also stronger and capable of handling much higher spring rates. A typical S13 Yellow will handle a 400-450 lb spring, whereas a 86 series damper will handle a 700+ spring.
Modified by veilside180sx at 6:06 PM 1/6/2009
Modified by veilside180sx at 6:46 PM 1/6/2009