Miatav8,MstrASE,A&P,F wrote:
They also make a good choice because they are front steer and the arms are correctly angled for rack and pinion steering. Most 90 and older had 14 inch wheels with 10.6” rotors so the calipers would clear the inside of the wheel.
There were some 15 inch wheel trucks that used a 11.3” rotor but either the caliper or spindle was different to accommodate the caliper relocation. It appears the 90 and older rare 15 inch setup was essentially the same as the 91-96 setup which also included larger bore calipers (from 60mm to 65) with the same size master (15/16) for more pressure at the pads.
I suspect your dropped spindles are for the 14 inch wheel application and overkill in a sub 2000lb car but check. Don’t want to order the wrong size rotors!
FWIW, the 91-96 is the same basic design as the 87-90, uses the same screw-in joints, but has bigger rotors and bigger bore calipers.
Are you familiar with the first gen Dodge trucks? All the research so far shows the same inner and outer wheel bearings for the RWD truck regardless of engine or brake rotor size (even the 5.2L Shelby). I assumed that would mean the 11.3 or the 10.6 rotor would fit on the same stub axle. Like you said, I don't see any applications of the 10.3 in rotor passed 1989 trucks.
davew wrote:
I will 2nd MV8's "overkill in a sub 2000lb car" I would look at all your options when selecting calipers. I have 10.3" diameter front disc, and actually down-graded caliper size, from a 56mm to a 50mm Dia., because it was to easy to lock up the brakes. Using a 13/16" Dia M/C, with 5 to1 lever ratio.
Davew
That's good to know since the stock caliper on the base 2wd 4cyl truck is 60mm... Hahaha. I wonder how easy it would be to adapt a smaller fixed caliper. Maybe a 2 piston from the rear of someone's modern performance car hahaha.
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