Brembos on rear

[07BLACKStang]

I'm pretty sure Bear makes a floating kit. The Shelby KR's have them.

I talked to Baer about this a while back and they are definitely a floating kit.

 

[Clipboard]

Wilwoods it is! Thanks for the replies and info

 

[retfr8flyr]

Earl's yours look awesome in person. I really want a set for my ride.

Thanks Cam, I have been very happy with them. Hooking up the emergency brake cable was a little challenging but they probably have a better setup for our cars now.

 

[Sky Render]

Are they using the floating rotor to avoid knock back?

That doesn't look like a floating setup to me. Unless I'm reading this diagram wrong, it looks like the parking brake and caliper are directly bolted to the axle tube, and that is most definitely not floating.

In case anyone is wondering what gmitch and I are talking about, pad knockback is caused by the axles moving left and right relative to the tubes. This is caused by heavy lateral acceleration, like what is seen on an autocross or road course. The axle moves laterally, which causes the rotor to move (it's bolted to the end of the axle, after all), which pushes against the pads and presses them back into the caliper. Because your pads are no longer close to the rotor, your brake pedal will GO TO THE FLOOR the next time you push it, because the pads have to move back to the rotor.

This, obviously, is a Very Bad Thing (TM) to happen when racing your car.

 

[retfr8flyr]

I have never experienced anything like that with my Wilwood's. I have a TruTrac in the rear and with the spacer installed between the axles, there isn't much movement like a stock setup may have.

 

[Clipboard]

I have never experienced anything like that with my Wilwood's. I have a TruTrac in the rear and with the spacer installed between the axles, there isn't much movement like a stock setup may have.

The 9" ends, offered in the package by lethal performance, would stop the lateral movement of the axles wouldn't it? This is the rear package I'm talking about

http://www.lethalperformance.com/sh...s-1/s197-gt500-rear-end-axle-upgrade-kit.html

I'm sure this kit would be overkill for a road racer. Again the rear brembos, or anything I put back there, would be for aesthetics. The rebuild would be insurance/peace of mind launching on drag radials/slicks.

 

[Sky Render]

The 9" ends, offered in the package by lethal performance, would stop the lateral movement of the axles wouldn't it? This is the rear package I'm talking about

http://www.lethalperformance.com/sh...s-1/s197-gt500-rear-end-axle-upgrade-kit.html

I'm sure this kit would be overkill for a road racer. Again the rear brembos, or anything I put back there, would be for aesthetics. The rebuild would be insurance/peace of mind launching on drag radials/slicks.

It's still a solid rear axle. There will still be lateral movement.

 

[Dubstep Shep]

It's still a solid rear axle. There will still be lateral movement.

I mean, there's always deflection in every single thing that goes under any amount of force. The question is how much deflection.

If you didn't have a limited slip and didn't need the relief the later force provides on the LS clutches, could you not shove a solid spacer in between the axles to minimize the axle deflection? That factory spring probably sees a lot more deflection than a solid spacer with maybe a millimeter or two of slop.

What do the high horsepower road racers use?

This is something I'm somewhat curious about as well, as I had thought about going to a 9" rear end or at least the axle ends until I found out they aren't great for road race.

 

[Whiskey11]

I mean, there's always deflection in every single thing that goes under any amount of force. The question is how much deflection.

If you didn't have a limited slip and didn't need the relief the later force provides on the LS clutches, could you not shove a solid spacer in between the axles to minimize the axle deflection? That factory spring probably sees a lot more deflection than a solid spacer with maybe a millimeter or two of slop.

What do the high horsepower road racers use?

This is something I'm somewhat curious about as well, as I had thought about going to a 9" rear end or at least the axle ends until I found out they aren't great for road race.

Lockers... some still use the Torsen T2R, some still use a clutch based diff like the Eaton Posi or the Auburn units in an 8.8. The pad knock back is an issue that is taken care of with the standard brakes reasonably well if you keep track of your axle end play. A tap of the brakes before the big braking zones helps eliminate some of it too.

 

[Clipboard]

Lockers... some still use the Torsen T2R, some still use a clutch based diff like the Eaton Posi or the Auburn units in an 8.8. The pad knock back is an issue that is taken care of with the standard brakes reasonably well if you keep track of your axle end play. A tap of the brakes before the big braking zones helps eliminate some of it too.

So even with a floating caliper,including the stock brakes, there is still some knockback present?

 

[Whiskey11]

So even with a floating caliper,including the stock brakes, there is still some knockback present?

Yes and if you don't call it knock back you can definitely see how it wears out the rear brake pads. My rear brake pads are uneven inside to outside... why? Because C-Clips and worn out T-lok...