Can anybody tell me differences or experiences with the coilover options from Devek (Hypercoil springs & Koni shocks) vs. 928 Intl. (Eibach & Bilstein) vs. just replacing my original Sport Shocks on my late 1986S ? I've just started autocrossing my car and would like to go to the track later this year.

Thanks.

 

I am running the Koni package on my car with a lowered suspension. The Koni shocks are internally adjustable were I believe that the Bilstein are externally adjustable (BIG DIFFERENCE). I do not know handling differences between the two, however mine are a lot stiffer then stock. If you autocross you really have to find your comfort zone and ability.
Most clubs follow the SCCA category and have all 928s in B class. If you run stock I hate to say it but over all a 928 is not going to beat a Honda S2000. They have almost 1000 lbs less weight and are smaller to get through the tight courses. The top 10 cars in nationals were S2000's. With only a few 928 running, they are not going to reclassify the Honda’s or us.
With that said, spend your money on what will help you on the track and not auto crossing. Don’t get me wrong, you can learn a lot about driving these cars by going to the autocross events and they are a blast.

Happy driving

Ell

 

Dion,

(In my experience, most stock autocross classes won't allow a spring change. That said...)

I can't compare the various combinations, but I have the Eibach springs with Koni externally adjustable shocks on my '86.5 (<a href="http://www.928gt.com/Suspension.htm#Coil" target="_blank">these</a>). The Koni/Eibach combo is quite good for autocross and track. My mechanic (who races his 951 at PCA club races) really likes the combination on the car as well.

The externally adjustable shocks are very handy for autocross and track driving, and adjusting to track and weather conditions. About $600 more, but worth it if you're going to hit the track or autocross regularly.

BTW, autocross is great for learning how to read a course--not just the lines but also how the pavement changes and affects adhesion. These are great skills to have.

 

Thanks for the feedback on your set-up. Have you changed from the stock swaybar, also?

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by SHRKBIT:
<strong>Dion,

(In my experience, most stock autocross classes won't allow a spring change. That said...)

I can't compare the various combinations, but I have the Eibach springs with Koni externally adjustable shocks on my '86.5 (<a href="http://www.928gt.com/Suspension.htm#Coil" target="_blank">these</a>). The Koni/Eibach combo is quite good for autocross and track. My mechanic (who races his 951 at PCA club races) really likes the combination on the car as well.

The externally adjustable shocks are very handy for autocross and track driving, and adjusting to track and weather conditions. About $600 more, but worth it if you're going to hit the track or autocross regularly.

BTW, autocross is great for learning how to read a course--not just the lines but also how the pavement changes and affects adhesion. These are great skills to have.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Arial,Helvetica,Geneva">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Originally posted by Dr. D:
<strong>Thanks for the feedback on your set-up. Have you changed from the stock swaybar, also?
</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Arial,Helvetica,Geneva">Dion,

I had the Ott adustable sway bar drop links front and rear, but reverted to the stock rear links due to excessive oversteer.

Next season I want to put a more easily adjustable front sway bar on the car.

 

Curt or Anyone,

How do I tell which shocks are currently on my car. It has the Sport Shock option code and the shocks are a dark reddish color with externally threaded adjusters. A friend told me that Koni's were red, but in my limited reading Konis weren't an original option. Do I have Boge's? If I want to replace with either Bilstein or Koni, I will need different adaptors?

Thanks for any input on this, too.

 

Can anyone advise on the most cost efficient way to replace the coil over shocks on my 1985 928 S4? i would just like it to hadle as new. No tracking for this car.

 

Use your stock springs and buy a set of bilstien shocks,
they are making them again,
I just put a set on an 84 928S the car rides great
you also need the 4 white discs and the 4 new bump stops
set it up for regular ride height for maximum performance from your new shocks

 

what stripes do you have on your springs? did you replace boge non-gas shocks? if so, did you have a difference in ride height?

 

the springs were on an 84 and might have had white stripes
the front shocks were black Boges and the rears were gray Boges,
whomever swapped the front shocks didnt use a thread collar or adjuster collar,
so the front end was sitting race car low,
now its sitting nice .on the hi side of factory settings

 

You should be starting at EVERY piece of rubber in the suspension first. Shocks are the last item on this list. So much is missing that in your mind might be something else, until these 40yr old MUCH softer then new, and in a few cases most likely BROKEN parts are replaced.

I would argue you dont need different springs other than what you already have either, UNTIL new rubber and shocks are in.

And..the most expensive parts, and the ones that contribute to "it feels old" and also "it feels new"..like the upper mounts which have collapsed, maybe up to 1/2", and put a lot of noise into the chassis and roughness, and the front LCAs, which have robbed you from a TON of spring rate (below AND above normal ride height on bumps/humps in the road).

You said like new.

The path there is probly going to put you, easily, at $4k and then some.. I was mentally at $2200 for just M474 OE shocks and upper mounts all around, before new front upper and lower LCAs which are finally new units from 928intl.com along with the rear knuckle...and the count of everything else you can still get from Porsche not in this short list.

 

As Speedtoys suggested, replacing all the rubber parts connected with the suspension would be the best move.
NOTE for most owners a swap out of the shocks will restore 75 to 80 percent of of the driving experience.

NOTE when doing all the parts VS just new shocks a clear difference in ride and handling can be felt between the two .

The full monty means the steering is more direct and the chassis has a more solid feeling while making turns,
as well as hi speed stability will feel more connected to the road.

I can usually tell when a 928 needs new shocks in first 10 feet,
by how much the rear bounces when letting off the brakes and giving it some gas.
If a bouncy butt is noticed then thats a good indication shocks are worn.

BTW this 84 that I just put new Bilstien shocks on, rides really nice.
It has a solid and well controlled ride but it is not jarring where every bump is felt.
These are Black capped Bilstiens .
They are comparable to the Red Boge shocks in ride comfort and control ability,
and come with new lower perches and adjuster collars.
NOTE the original piston shaft diameters have been decreased 1 MM from the originals fitted to the car

 

I dunno..Id bet 90% of 928s up to 1990 that are not parked garage queens, needs new LCAs and knuckles badly.

NO amount of shock can mask a whole set of missing springs...or a rear end that over toe's because the weissach is too soft.