What to do for my rear brake upgrade?

z26guy

Ok I'll be doing the front using the stuff from a Grand Am......now I thought about doing the Neon rear disk swap but I would much prefer the larger bolt pattern out back. I beleive Curtis had this done on his turbo Z24 but.....his site was down the last time I looked. I''am open to any ideals or info.........I was also looking at the rear disk brakes from the Grand Am as well but haven't had the time to really think about it. Also was thinking the rear disk brakes from a older pontaic 6000....

Come on James!!!! This car has to stop as good as good handle!

Ideas people......

v6bluebird · Posted: Thu Nov 20, 2008 9:15 pm Post subject:

firstly we need a list of FWD cars with the 5x114.3 bolt pattern. Then narrow it down to cars with rear disk(prefferably with internal drum-style e-brake). then look at how the bearing mounts up and make something work.....

been planning it for a while but never have the time....

barrok69 · Posted: Thu Nov 20, 2008 10:39 pm Post subject:

Grab Alero rear disc brakes, and all you have to do is get a piece of plate steel cut with 2 holes for the caliper and another 4 holes for the wheelbeating bolts, and a bigger hold in the center of that wheel bearing pattern for it to clear.

z26guy · Posted: Thu Nov 20, 2008 11:22 pm Post subject:

Yeah I have been thinking of that set-up Rob ....the Alero and Grand Am are the same I do beleive but now I'am rather interested to see how the e-brake cable would have to run. Getting this parts to test my theory is not a issue nor the machining really........

Did anyone remember what Curtis used?

Six_Shooter · Posted: Thu Nov 20, 2008 11:35 pm Post subject:

What year Grand Am? Older Grand Am is exactly the same as the J-body, the newer isn't much of an improvement as they should be the same as what my Malibu had stock, 11" disc or so. I upgraded to 12" disc, pretty easily, so if you are looking at the N-body front brakes, step one step farther and go for the W-body rotors (12") and Corvette/F-body dual piston calipers. IIRC it was '98 to '01 F-body. I used the W-body caliper for my upgrade, since I couldn't find the caliper anchors at the time for less than $200 per side. Now I can buy the caliper WITH the anchor for less than $100 per side.

It would be too much work to go to the F-body calipers now, since I had to open the anchor to knuckle bolt holes to 14mm. The F-body and 'Vette use smaller 12mm hardware, that is the same as the N-body.

I have some ideas for a rear disc set-up as well, for the J-body, that could be a bolt on affair with properly designed brackets. This would retain the smaller bolt pattern though.

If you really want the larger bolt pattern you pretty have to go with late model N-body, or W-body wheel bearings, and then come up with some sort of caliper anchor bracket.

cahilj · Posted: Fri Nov 21, 2008 10:15 am Post subject:

This is something I really never looked into. I always wanted to keep the 5x100.

I would have to say go the N body route like Six said. I know there have been a few 3rd gen guys who have swapped the entire rear subframe out for the IRS, and AFAIK, their ebrake cables worked fine. Considering our drums are the same, it would be good to go. Just adapt the bearing mount plate for the N bearing, design a caliper bracket, and thats it. You may even be able to use the N caliper bracket, but I'm not sure.

Six_Shooter · Posted: Fri Nov 21, 2008 11:24 am Post subject:

No, the "caliper mount bracket" or more properly where the caliper anchor attaches is part of the knuckle. So a new (custom) piece will be needed for this application, no easy bolt on afairs here.

troublesomez24racing · Posted: Fri Nov 21, 2008 11:24 am Post subject:

xbot · Posted: Fri Nov 21, 2008 11:31 am Post subject:

troublesomez24racing · Posted: Fri Nov 21, 2008 11:43 am Post subject:

psquare75 · Posted: Fri Nov 21, 2008 12:01 pm Post subject:

I'll go out on a limb and say drums will stop just as well as rear disc, the only real advantage is brake fade.

Six_Shooter · Posted: Fri Nov 21, 2008 12:05 pm Post subject:

xbot · Posted: Fri Nov 21, 2008 12:06 pm Post subject:

Six_Shooter · Posted: Fri Nov 21, 2008 12:09 pm Post subject:

troublesomez24racing · Posted: Fri Nov 21, 2008 12:16 pm Post subject:

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