Superformance rear rotors

[wanab5150]

I have a Superformance #2769. Prior to about #2700 all SPF came with 4 piston calipers at all 4 corners. After about #2700 they all came with 41mm single piston calipers with a built in emergency brake.

I am changing all the pads and turning the rotors. The fronts came off like any normal car but the backs I cant figure out. I removed the 5 allen studs and the knock off adapter. There are six allens through the hub holding the rotor but there's no way to get the rotor off over the center of the hub.

I'm wondering if I have to remove the center nut to pull the entire hub off or if I'm missing something............... Any knowledge of this? tom

[PANAVIA]

The Allens hold the rotor down like lugs. - there is no Slipping' -- careful on pulling the allens , use a proper fitment of wrench.

[wanab5150]

Yes, the 6 allens are out and the rotor is free. I don't understand what you mean by"slipping".

[wanab5150]

Originally Posted by wanab5150

Yes, the 6 allens are out and the rotor is free. I don't understand what you mean by"slipping".

the rotor is off but held behind the axle stub. I have to assume that I woll have to drop the spindle and remove the axle to get the rotor off.... Yes?

[wanab5150]

I guess not even the experts have the answer or don't want to give up the secret. Rather than taking the entire rear end apart I re-attached the rotor and just put new BP-10 pads back on.

Some of you with later Superformance cars after #2750 have the same Wilwood Dynalite 4 piston calipers on the front with the (CPB) Hydra-Mechanical Caliper 1.62" single piston in the rear.

Wilwood said they would normally recommend BP-10 pads front and rear. I informed them that I had front end lockup in heavy breaking or panic stops so they recommended the least aggressive pad, the Poly Matrix "Q" pads for the front and the slightly more aggressive BP-10's for the rear.

One possible explanation for the lock up issues is that the cars originally came with 275x15's with 295's as an option. Possibly with the giant 315x17's and the 265's on the front, the front is overwhelmed... That and the fact the rear caliper is a tiny 1.62 inch single piston which replaced the same Dynalite 4 piston calipers Superformance cars before mine had.

The BP-20's (even more aggressive) pads were not recommended except for racing as they are much harder on the rotor and for an unexplained reason are beveled on both ends. The pad has less that 70% or the pad material that contacts the rotor until they are worn down about half way. When I asked why, I was told "that's just the way their made." ??????????????

We'll see what happens.

[jcam]

Tom,

Try contacting Randy at Cobra Valley. He has been extremely helpful with all things concerning Superformance Cobras.

Jamie

[PANAVIA]

Havent had time to be on the forums of late -