Who has B-Body spindles & 12" brakes????

[LS6 Tommy]

ALL g-bodies have pretty bad bump steer. The B-body spindle DOES make it a little worse, but generally only "9/10ths" drivers or people who have been told about it complain. Most people never notice how bad the stock setup is, but when they're informed about the minor increase with the B-body spindles they realize it for the first time. It's not that it's so much worse, it's that they never payed any attention before. 1LE rotors & 12" B-body rotors are the same except for the bolt circle. Pickup truck or late 70's Camaro calipers that use D52 pads are the ticket.

Tommy

 

[RatMalibu]

iirc the 1LE rotors are 1.10" thick and the B-bodies are all 1.25" thick....the parts store catalog will have the dimensions for sure though...I've misplaced my Delco brake catalog :-/

 

[LS6 Tommy]

iirc the 1LE rotors are 1.10" thick and the B-bodies are all 1.25" thick....the parts store catalog will have the dimensions for sure though...I've misplaced my Delco brake catalog :-/

You may be thinking of 67-70 B-body rotors. They have a different rotor than the ones used on the later years. It's 5 on 4.75" bolt pattern, 11.77" diameter, 1.25" thick. The rotors used on 78-92 12" brake B-bodies were 5 on 5", 11.88" diameter, 1.10" thick, just like 1LE rotors except for the bolt pattern.


78+ B-body 12" discs are the same, just the bolt pattern is different. Some early units had a smaller outer bearing. We need the larger bearing model. The '82-'92 12" B-body caliper is the same caliper (& pad) as the late model Camaro calipers that are used in the conversion.


Tommy

 

[Eldogg]

I also have the Hotchkis upper a arm tall spindle conversion. I would do the S-10 blazer spindle/C5 corvette brake swap if I were to do it again today. I also did mine almost 10 years ago. Bumpsteer is not as bad as everyone makes it out to be or I'm not a good enough driver to realize it.

 

[motorhead]

I've got the B-body set up on my Turbo T, it was made available by Robert Adams (c. 2002) as a kit 10 years ago before other affordable options were developed.

My car uses UB Machine UCAs (with the Mopar truck screw-in ball joint), reamed spindles, 1LE rotors, the mid-80s B-body caliper (going to move up to the Howe dual piston replacements soon) and Hawk HP+ pads.

I am also a firm believer that 99% of the people who have experienced bumpsteer aren't aware of it, nor have they experienced it at a time when it might have an adverse impact on performance driving.

 

[nillabu]

Heres a link I've held on to. Done the swap. Don't really notice the slight increase in bumpsteer as its only a street driven car.

http://www.fatherley.com/2009/07/20/12-front-brake-upgrade/

Steve