Fabricated A-Body spindle ideas and discussion

DionR said
The one drawback to the S550 rear hub is that it requires a bolt to squeeze the bearings. The Mach 1 hub doesn’t require that and doesn’t seem to be more expensive, but the bolt pattern is not symmetrical and might be difficult to fit around the LBJ bolts.

There are two different front hubs for the GT350, GT350R and Mach 1.

HUB395 has the longer wheel studs that would have been on the GT350R
HUB328 has the regualr length wheel studs.

swisswill said
I'm with you guys, my goal is around wheel bearing, ABS, and better/more simplified brake options. Improved geometry is a side benefit for me, but if we can do it, let's do it. I only throw out alternative designs and production options because that's what I found in my research. I think we're best off coming up with a design that we can have a few sets made up to begin with, then others can have the files and build their own if they wish. Michigan Metalworks takes a different approach and I bring it up because it's stout, maybe lighter/maybe not, and they've already said they could do it, and if we brought them the design and files, it'll cost that much less to have it produced. But just another option.

On the rotor, if using a Ford hub, why not simplify the rotor fitment and use a Ford rotor? The '15 Mustang has a rotor that is 13.9" diameter while the SRT rotor is 14.17". All the necessary holes are perfectly sized to the hub already, same thickness, almost same diameter which means the four piston SRT calipers should have no problem playing nice with the rotor, and there is no need to use feeler gauge material.

Mustang
View attachment 1716391448

SRT
View attachment 1716391449

Have you seen MillerBuilt's fabricated spindle? It's a super nice piece.
Fabricated C5/6

Years ago I bought suspension analyzer to layout my '69 front and rear suspension. I'm going to see if I still have the CD for that. I was on a mac at the time and when I went back to PC forever later, I had all but forgotten about it. I might still have it. I'm going to look this weekend. If I do, I'll get it installed and then we can start getting measurements. Or maybe I send it to one of you guys that has better access to a vehicle than mine in storage.

The 14.2" SRT rotor has a lot more offset to is as opposed to the S197 2012 14" GT500 rotor. Using the SRT rotor will move the calper away from the wheel spokes.

DionR said
The S197 rotor is a better idea, still 14" and a better design. And if the knuckle were based about the S197 4 Piston brakes, the S550 6 piston calipers would bolt on with the 13/14 GT500 15" rotor. Or so I have read.

The SRT rotor has the advantage in my mind though as it is slightly bigger in diameter and has more offset so the caliper doesn't stick out as far.

That said, the S197 setup has the advantage for upgradeability. The SP setup upgrades to the HC 6 piston brakes but that takes a wheel bigger than 18".

I looked for GT350 calipers on RockAuto and didn't see any. This makes me think that while they might be easy to source, they aren't as widely available as the 14" S197 and S550 stuff.

I have all the part numbers for the S550 6 piston Brembos and the GT350 6 piston Brembos. The GT350 calipers are radial mount and not a bad price right from your local dealer. I'll get the part numbers added in here later.