75-79 X- Body -[9C1 police handling pkg]- questions

[CadVetteStang]

Originally Posted by Apogee

Obviously, the B-body rotor is 5x5 however the 1LE F-body rotor (88-92?) is the same as the B-body rotor only with a 5x4.75 pattern. This set up will still allow you to run 15" wheels if that's part of the plan.

Thank you for that information: However, another question: the 1LE F-body rotor (88-92) would require the use of that a high offset spindle because of the 88-92s greater positive offset, right? That would mean more scrub and less fender clearance with a standard offset 15” wheel. However, I could use 16” or 17” F- body wheels on the car with no problem. What spindle would that rotor fit on?

[Apogee]

The 3rd generation F-bodies don't use what I would call a "high-offset" spindle or wheel, hence the need to run wheel adapters when running high-offset wheels on such applications. You may be thinking of the 4th generation (1993-2002) F-body applications.

IIRC, the 1LE rotor has the same track width per side relative to the inner wheel bearing than the smaller 11" brakes used on your factory Nova setup. The 1LE rotors will require a SET3 outer wheel bearing, so only the .844 diameter spindles will be compatible if you decide to go that route.

Tobin
KORE3

[CadVetteStang]

Originally Posted by Apogee

You may be thinking of the 4th generation (1993-2002) F-body applications.

Yes, I was thinking of 4th gen - oops

Originally Posted by Apogee

The 1LE rotors will require a SET3 outer wheel bearing, so only the .844 diameter spindles will be compatible if you decide to go that route.

.844 diamiter spindles? So are the B-Body spindles .844 diameter? If that is what you meant, then they would be a direct swap to B-body spindles without thickness issues or caliper bracket spacers - right?
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[Apogee]

Originally Posted by CadVetteStang

.844 diamiter spindles? So are the B-Body spindles .844 diameter? If that is what you meant, then they would be a direct swap to B-body spindles without thickness issues or caliper bracket spacers - right?

The 91-96 B-body spindles use SET6 inner (1.250" ID) and SET3 outer (.844" ID) wheel bearings. There are two versions of the B-body spindle with respect to the lower ball-joint size, with the smaller one being 9/16" and compatible with the 75+ X-body control arms. The 5/8" lower ball-joint spindle found on the 9C1 Caprice and wagon applications is the same casting and spindle pin, it just has the lower ball-joint hole machined for the larger ball-joint.

You can buy new B-body spindles from GM or find them readily in most wrecking yards. What you won't find are 1LE rotors in most salvage yards since they were fairly rare to begin with and highly sought after in the early to mid-90's. The 12" upgrade is a pretty easy, all GM upgrade that doesn't require any spindle modifications and will give slightly more performance than the factory 11" setups without a lot of cost.

Tobin
KORE3