RX7Club.com - Mazda RX7 Forum - Can I use 4-piston calipers on upgraded 4lug GX Rotors?

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Can I use 4-piston calipers on upgraded 4lug GX Rotors?

Here's the deal. I've got an '87 GX, which has the 4lug hubs/rotors, I need to replace brakes all around as I'm somewhat restoring this car and the brakes are basically non-existant..

I don't wanna upgrade everything I'd need to to put 5lug stuff in there, so I was thinking I'd pick up some new rotors off ebay like these ones:
http://cgi.ebay.com/ebaymotors/86-88...spagenameZWDVW

And then buy some TII calipers for the front and rear, like this:
http://cgi.ebay.com/Mazda-RX7-RX-7-T...QQcmdZViewItem

Would those calipers work with the rotors I linked to?.. what would if not?

I basically just need to know what do I need to run the TII calipers w/ a 4lug setup, or if that's even possible.

Another thought I had, was how good are the standard single piston GX calipers?.. if I just had some good new rotors, and really nice pads, would that give me half decent stopping ability? or am I asking for trouble with that if my car's gonna be making a bit more power than stock..? like these bonez stage1 pads:
http://rx7.com/store/rx7/fcbrakes.html

I dont' know much about Rx7 brakes, so I'm sorry for the noob questions here.

thanks for any help on the matter

Getting the 5 lugs would be better in the long run.

Any idea if I can run the 4piston calipers with 4lug rotors?

Quote:

There are three factory brake setups (at the wheels) on FCs.

4 bolt, single piston front and rear disks (found on base S4 cars only)
5 bolt, single piston front and rear disks (non vented rears) (found S5 cars only)
5 bolt, 4 pot front, single pot rear, 4 wheel disk (vented rears) (found on both S5 and S4 cars)

As far as the differences and similarities between the two 5 lug setups:
The front rotors are the same.
The rear soft lines are the same.
The calipers from either setup will bolt onto the other.
The rear rotors are different
The rear calipers are different.
The front calipers are different (DUH).
The front soft lines are different and not interchangable IMO.
The front 4 pot calipers require a small hardline mounted to the caliper and the strut. The single pots do not.

It is a huge upgrade to go from the 4-bolt to the 5-bolt 4-pot setup. As the 4 bolt brakes are aweful, I used to burn up calipers, pads, and/or rotors every other month on my 87base with the 4 bolt brakes. They didn't last half a day at the track no mater what pads i used.

The upgrade from S5 5-bolt single pot to 4 pot with vented rears is a minor upgrade, but important if you use your car at the track. I don't think there is alot of benefit for a street driven car between these two setups, but some.

:dunno:

I think I've decided I"m just gonna get some nice 4lug rotors and pads, and that should do the trick.. I'm not gonna be racing this car on a road course or anything, so I'm not too worried about break fade or anything like that..