2nd Gen F-Body 1LE Conversion - Light Weight Hub and Rotor Combo?

[VCT-TA]

Does anyone know of a light weight (aluminum) hub and bolt-on or “hat” rotor combo that will work with the 1LE conversion, stock B-Body spindle, 12” rotor and Wilwood D52 calipers?

The stock 12” 1LE rotor/hub with bearings and seals weights about 28 pounds. I would love to find something a lot lighter.

Thanks for any info

[BonzoHansen]

Never heard of anything that works for that. Maybe call wilwood?

[badazz81z28]

You're better off looking into Kore3 hubs for a C5 conversion. If you're looking for lightweight parts, it makes no sense to try and do it with stock parts

[F-Body International]

You're better off looking into Kore3 hubs for a C5 conversion. If you're looking for lightweight parts, it makes no sense to try and do it with stock parts

Kore3 uses stock GM spindles, calipers and rotors. A Wildwood hub with bolt-on rotor would be lighter than a heavy slip-on GM rotor like what Kore3 brakes are designed for. I don't want to downplay Kore3. Mr. Tobin does have an awesome design going.

VCT-TA, like I mentioned on the other forum, you may want to consider contacting Pro-Touring F-Body on this subject.

[VCT-TA]

Thanks for the replies.

The idea is to fit the stock B-Body spindle and D52 caliper with a light weight hub and rotor combination and keep the car track width the same.

I took some measurements of the original one piece rotors with bearings and compared to the Wilwood hub, hat and rotor drawings. Below is the best I have been able to come up with. It may be totally wrong. I just can’t figure everything out without the experience and knowledge or the parts to test fit. Need help.

If PTFB can figure it out, I would be interested in buying. I already have the B-body spindles and Wilwood D52 calipers.

Option 1 (like PTFB GT brake kit)
• Wilwood hub; 270-11048 (N=1.84”)
• Wilwood adapter ring; ??? no idea about this.
• Wilwood rotors; 160-13980/1 or 160-13978/9 (11.75x0.99)
• Is this rotor diameter large enough?
• These rotors are only 7.1 lbs., are these too light for street?

Option 2 (hat and rotor)
• Wilwood hub; 270-10494 (N=1.63”) for hats
• Wilwood hats; (need ~1.68” off-set), 170-0317 (1.59 o.s.), 170-0259 (1.71 o.s.)
• Wilwood rotors; 160-13980/1 or 160-13978/9 (11.75x0.99) (same as above)

Also, some day it would be fun to look at upgrading to 1.25” wide rotors and the Wilwood D52 calipers for 1.25” rotors on the stock B-Body spindles.

Thanks again for the help.

[Apogee]

We've teamed up with a company in the past (WX3 Performance/Bill Harper) to offer a wide-rotor kit for the 1991-1996 B-body applications, which use the same rotors as the 1LE, except with a 5x5x3.06 wheel pattern. The kit uses our GM tall-spindle hubs and a custom rotor hat paired with a DBA disc and the wide-body D52 calipers (or aftermarket equivalent). The end goal was to be able to run the 15" 9C1 wheels with a brake rotor capable of handling the abuse a 4400# car can dish out without any spindle modifications. There are some write-ups on the Impala SS forums if you're interested in checking them out. I know we've made some dual wheel pattern hats in the past, presumably for 5x4.75 applications.

At the end of the day, we're usually trying to maximize the thermal mass of the rotor and minimize the mass of the hub assembly without sacrificing reliability or rigidity, that way at least you're getting some added performance for the weight you're carrying, but that may not be what you're looking for. Drag racers are typically fine shedding brake performance along with weight, however strpro-touring and road course rbrake equirements tend to differ.