[img][/img]bracket difference

Last edited by 50vert (12/13/2019 1:50 PM)

I have verified I have correct 11.65 rear rotors. Correct cobra rear calipers. Im thinking the information ive read was wrong and my customer purchased the wrong rear axle caliper mounting brackets # F42C-2C10x-BA the axle caliper brackets are mostly flat with a slight raised surface around where the caliper should mount.

Last edited by True74yamaha (12/13/2019 4:06 PM)

The bracket from LMR, is the Race Cars North bracket.
There's also someone on Corral selling a pair for $130

The rear is an 92 mustang 8.8 that my customer wants cobra rear disc brakes installed.

So my Boss ordered the Northracecar.com brackets for the rear. So Im curious which would be the best bore size master cylinder for the fox body. It has dual piston cobra calipers up front and cobra calipers in the rear. Im wondering which would be the best master cylinder to go with. The 1993 Cobra 1" bore, 94-95 GT 1 1/16" bore, or the 94-95 Cobra 15/16" bore master cylinder? Or should I order a newer different year master cylinder? All my local parts stores have to special order any of the mustang master cylinders listed.lol I did notice that 93 Cobra master cylinders have the same size ports as the 94-95 cobra the GT has the same size but in the opposite port orientation.

For the Fox body the best option is the '93 Cobra power booster and master cylinder, both of which are available from the aftermarket. 

The other thing you will need to do is convert the lines on the car from a 3 port master to a 2 port master.  There are kits for this from places like Maximum Motorsports.  Or there are other options.  Regardless of what you do you need to remove the proportioning section from the factory combination valve and install a plug (Maximum Motorsports or other).  Then install an adjustable proportioning valve in the line for the rear brakes to set the bias. 

Not '94 Cobra, '93 Cobra.  There are differences, and the '93 is preferred.  The stock Fox booster is problematic because it wasn't designed for this type of application.  The '93 Cobra one was.  In researching this swap myself I read several posts where guys complained about the brake assist from the stock Fox booster and swapping to a '93 Cobra booster solved the issue.

A little more time and/or money now is well worth it to prevent the car coming back because the customer isn't happy.  This falls under the mantra: there's never enough time to do it right, but always enough to do it twice.