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Initial setting of spring perches for stock height with Eibachs?

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Old 08-20-2010, 01:30 PM
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SQLGuy
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Default Initial setting of spring perches for stock height with Eibachs?

Hi folks,

I've got my Eibachs from 928 International's special sale, and my Bilsteins from 928sRus' special sale, and am now getting ready to install them.

I searched and found some discussions of perch and ride height with these springs, but I didn't find any final conclusions. One poster said he had to max out the perches for factory height with the Eibachs, but Dr. Bob said the rear perches were pretty close at original settings...

Any final conclusions on where I should set the perches, while everything's apart, so I don't have to do too much adjustment once they're installed? I want to stay pretty much at stock ride height - the roads in Colorado Springs aren't very tolerant of low-clearance vehicles.

Thanks,
Paul
Old 08-21-2010, 01:27 AM
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dr bob
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Paul--

Iamd as high as I can possibly go on the front, with new Boges, and still not up where it was with the sagged stock springs. The rears had the sleeves set where they were with the stock springs, and ended up about 5mm lower ride height as a result. Eight turns more and they were OK.

I'm at a point where I'm seriously considering shopping for a set of new stock springs, and offering the Eibach's to someone who needs the sharper handling.
Old 08-21-2010, 03:15 AM
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SQLGuy
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Interesting. I assume these are the 928 International Eibachs? I had thought that Mark said they were adjustable up to stock ride height...

Was yours maybe higher than stock before swapping in the Eibachs?

I may need to add a spacer or something if all the way up is lower than stock.

Thanks,
Paul
Old 08-21-2010, 02:06 PM
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NoVector
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Paul - Like Dr. Bob, I had to go all the way up on the front to get it to the WSM height. The rears were about the same as factory springs. You can try lower and crank them up as needed, but you'll have to wait on your alignment 'til you get it right (or where you want).

/ Bruce
Old 08-21-2010, 03:43 PM
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dr bob
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You can get them into the WSM-allowable range OK in front, but my house driveway has a steep contour at the apron thanks to the slope of our road passing in front. I need to have the car at the original height of 180-190mm if I want to have full use of the apron, not the allowable-droop minimum height of 170. I can get it to 175, but that's with half of the threads on in the inner sleeve exposed.

The apparent handling improvement with the Eibachs is impressive. Lots less body roll thanks to the higher rates and all. But my touring-car ride is gone, even with just the standard Boge gas shocks. You folks with the Bilstiens or Koni's must love to feel the road a bit more than I do.
Old 08-21-2010, 03:53 PM
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James Bailey
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Dr Bob you might try spring rubbers to spread the front coils just a bit .......
Old 08-21-2010, 04:01 PM
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dr bob
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Thought about that Jim but it seems kind of cobby. Plus it will make the ride even harsher. I'll call the usual suspects next week and see if there are new stock springs available. Mark doesn't show them on the website.
Old 08-21-2010, 04:48 PM
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James Bailey
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If you put them in the softer progressive area it should make little difference since they are pretty well compressed with the static weight of the car. When I have my front suspension apart soon I plan to cut a coil on the other end of the Eibachs (too stiffen them a bit probably add some rubber too !



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