Carl Fausett

Ever since we introduced the Hypercoil spring and spring perch kit with Koni rebound-adjustable shocks, there have been occasional calls for the same kit with Bilstein gas shocks instead.

Here it is:
http://www.928motorsports.com/parts/...lstein_kit.php

Took a little time to develop until I could get a guinea pig car to confirm the fit, and we have done that. I will post pictures of the installation shortly.

Thank you for your interest.

Pricing, and more info about the kit are available on our webpage
http://www.928suspension.com/

BC

Do you have to use the spacer on the front to allow a shorter spring because it does not come in a longer version of the same lb?

I was making some parts to do this, but I was only going to make a small base for the front perch that is already on the bilsteins.

Lizard928

It looks nice Carl.

though I see an error on your website.
It says in the description
"Separately, these items sell for $1,769.00 This kit will save you $200.00."

Then the price to purchase it below is "$1,769.00"

ubercooper

looks like I'm going to have to sell a kidney..

Lizard928

I was also wanting to ask Carl, do you offer the option of having bilstein custom valve these for the spring rates offered? If so how much does that add to the cost?

Carl Fausett

Thanks for the comments.

The spacer is more to mount and position the spring correctly, as opposed to just using a longer spring and letting it rattle around on the spanner nut.

I have not discussed custom valving with Bolstein, but I have with Koni. We can have the Knoi Reds customized to dual-adjustable, externally adjustable for $395 each shock, plus the price of the shock.

IcemanG17

Great looking kit Carl!!! As always.....

Track shark has your koni kit on it......& was quite surprised at how well it rides considering the heavy springs and light weight.....

atb

Any chance of taking a set of external single adjustment (rebound dampening only) and getting a compression dampening adjuster added?

Carl Fausett

"Heavy" as in stiff spring rate, not heavy as in weight of the spring. These are significantly lighter than the OEM springs.

The Koni reds are rebound-rate externally adjustable with the shocks on the car. I designed a tool for that and we sell it here: http://www.928motorsports.com/parts/shocktool.php

You can add the external adjustable compression dampening for $395 per shock pluys the price of the shock.

Bilstein does not offer this option that I can find.

RyanPerrella

Carl,

I was just going to send you an e-mail about this exact thing. I am a Bilstein guy and i think i like the idea of the hypercoils too to the stock strings for their reduced size and weight and huge assortment of spring rates (Not that i would likely ever swap springs mind you)

Glad to see this is available, but is there another solution to the fairly large spacer that you are using? Longer spring was mentioned, although i guess a longer steel spring would be heavier then the spacer made of aluminum.

I like the Koni package but dont really like the Koni dampers, (The bilsteins really are very nicely made)

Also as i understand it, the Koni's are adjustable, BUT you have to full compress the piston to adjust the rates, but this seems only possible when the shocks arent mounted or are they adjustable while mounted in the car with the simple tool?


EDIT:

Just saw the link Carl. It seems you have to remove the nut and compress the piston still, but you can do it in the car. But i would then worry about stripping the nut every time i played with this. Also it seems like it would take probably 2 hours at least to make the 4 adjustments.

But i see you mention that Koni can make them externally adjustable for $100. Do you or have you considered selling externally adjustable versions of the shocks? Is that $100 per shock i assume and not al 4? If its per shock i wouldnt bother but if its for all 4 its something to look into. Otherwise with the hassle of adjusting shock rates i think i would never adjust in which case i should just stick with bilstein.

Ispeed

I found that 600/400 Hypercoils were way too much spring for stock valved Bilsteins. I got a revalve for $65 a corner and I am satisfied now. That was spring of '08.

I will also say that the more I drive cars with Bilstein/Eibach it makes me want to vomit. The progressive springs I think are total crap, and allow the car to wallow and pitch in a way that is gone with the straight rate 600/400 Hypercoils. I would rather drive a 928 with soft stock springs and Bilsteins than with the Eibachs. At least the valving is a good match to the springs.
Sorry to be such a bastard about this, but my quest for better suspension was a long one. I also found that the Blue Ridge Parkway was the only great place to test suspension, and we only go there every June for SITM... My local roads are no good for testing stuff.

Carl Fausett

I adjust the rebound rates of my Koni's in 10 minutes or less per wheel. Its quite easy, and there should be no reason to strip the nut on top (although spare nuts are easy to have on hand if you are worried about that.

Because it is so fast and easy to adjust the rebound rate with out tool, I have never paid the $100 per shock to have Koni add the little white **** on top.

But: back to Bilsteins. Racers have told me that when spring rates get high, the Bilsteins do not keep up as well as the Koni's. That makes sense to me as the body of the Koni (and therefore the piston inside) is larger on the Koni. As for street use, I think they are both quite good, and the fit and finish of the Bilsteins is a little better.

Jim bailey - 928 International

The outside tube on a 928 Koni shock is the fluid reservoir the smaller inside tube has the piston and does the work , very old twin tube technology. The Bilstein is a single tube mono shock design and as such can have a larger working piston in a smaller body as well as other design features. Koni offers mono tubes as well just not for the 928....

RyanPerrella

Thanks for this little nugget Jim

Bilsteins it is

Carl, i was thinking of the "street +"for a 99% street driven GT. (I do love driving through canyons mind you)

I do like a very tight suspension, i dont mind a little harshness but i dont want crashing.

atb

Carl,

I think I need some clarification here.

I have the externally adjustable konis. My understanding is that the external adjuster does the same rebound adjustment as the internally adjustable (compress and twist) shocks, only allows for smaller increments of adjustment between max hard and max soft, and of course allows the adjustment without having to compress the shock first.

From your explanation above, it sounds like you are saying that on my externally adjustable konis, that I should be able to compress and twist to adjust the rebound dampening like the internally adjustable shock and in addition use the external adjuster at the top of the shock for compression dampening. I don't think that is what you mean is it? That I already have a two-way adjustable shock?