Dont overthink it gents.
On beetle IRS/ swing axle (ie early 944 setup): For 986 caliper use the 83-85 944 rotor 289x20.4. Test fit the loaded caliper with radial adapter without rotor, you will have to grind the inner pad slightly so pad doesnt interfere with radial adapter or 944 backingplate. You are grinding the metal support plate of the pad, and not the actual friction material. Now assemble again with rotor and grind same on outboard pad to just clear rotor. Its a small amount...2-3mm.
The 986 rotor is useless. Using the late rotor on early setup doesnt work, late rotor hat is too big. Late 944 (alum arms) has no cross compatibility with early 944 (steel arms)...its completely different the way the hub mounts in arm. About the only things that work between early vs late are na calipers and ebrake hardware.
For 996 or 986S rear caliper, use 944 86T rear rotor 299x24.
Advantage of using the 986 caliper with 944na rotor and slightly clearanced pads is that 15" wheels fit. With 986S caliper and bigger rotor you will need 16" wheels.
Clear as mud?
October 7th 2015, 02:08
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