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930 rotors w/ big silver-fvd caliper adapter needs washers?

I have just installed late model 930 rotors with 993 front calipers on my 79 sc using FVD adapters. the adapter fits the strut, but the adapter needs about 3/8" in washers to clear the rotor.

Is this normal to use washers with this setup, it just doesn't look right?


Last edited by sc; 03-22-2004 at 05:27 PM..
Old 03-22-2004, 02:22 PM
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Quote:
I have just installed late model 930 rotors
The 1 piece '82-89 versions?
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Old 03-22-2004, 02:39 PM
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Yes- 930 rotors from a 86 turbo. Any clues?
Old 03-22-2004, 04:20 PM
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What hubs?
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Old 03-22-2004, 04:30 PM
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I'm using 930 hubs as well. The calipers are dead center on the centerline of the rotors, but without the washers the caliper makes contact with the rotor.
Old 03-22-2004, 04:51 PM
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If I understand you, it is fine to use some spacers to center the caliper on the rotor
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Old 03-22-2004, 06:20 PM
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A washer yes, but 3/8" seems to be a lot. Have you contacted FVD? The 993 front caliper has the same o/s as a Big Red neither uses more than a thin washer when used w/ 2 piece rotors and the correct flat hat. ANY caliper o/s is supposed to be in the caliper adaptor



This is what a correct installation should look like. I suspect that the issue is related to the use of the 930 rotors and hubs on the SC. When those kits are sold for the '80 on 930 they use a different caliper adaptor than when they are sold for SC or '78-79 930
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Old 03-22-2004, 08:20 PM
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Its not the adapter to strut in question, that fits fine. Its the adapter to caliper that needs the washers.
Old 03-22-2004, 10:02 PM
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Are you sure it's a 993 caliper and not a 993tt Big Red? The difference is in the height of the caliper. The Big Red is ~10mm taller and needs a larger rotor. The 993 can be used w/ the 930 304mm rotor the Big Red cannot, it is usually used w/ a 322mm rotor.
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Old 03-22-2004, 10:11 PM
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Its a 993 caliper. The person I bought them from put big reds on to replace these.
Old 03-22-2004, 10:29 PM
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You have the wrong adapter if you need washers between the caliper and the adapter.

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Old 03-23-2004, 02:24 PM
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Thanks Bill. Thats what I thought. I don't think they do much work on early cars, this is the second set of wrong adapters. The first set I ordered for a 911 with big black calipers and they were also did not fit correctly. FVD stated that if I were using 930 rotors I needed a 930 adapter. I thought all 911/930 adapters were the same, since if you were using a radial mount caliper and a 32mm rotor the only other factor is which hub will be used. If you look at Vehicle crafts adapters it is only one type and part number.

Old 03-23-2004, 03:51 PM
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