why is there so much play between the holes in the wilwood rotor hubs and the axle studs? when i drive i constantly here the tapping of this over bumps and such

 

How is this possible? Aren't your lug nuts tight enough to hold it all together properly?

 

yes the lug nuts are tight, but if i jack the car up with the e-brake on i can move the wheel a tad bit forward and back the axle hub moves within the rotor, i just did some research, this brake kit was already on the 12 bolt i bought, and it seems they have .52" stud holes and the rear has 12mm stock studs.

 

If the wheels are tight and the rotor hat is moving something is very wrong. I agree with Sofa that if everything is tight the hat cannot be moving. Now if the wheel is not flush against the hat and or the hat is not flush up against the axle flange something could be moving and it would not be safe to drive.

It could be that you are hearing the brake pads moving in the caliper.

 

Rotor should self center on the end of axle. Hub centric.

If the mounting surfaces are square and the bolts are tight there can be no movement.

Make sure that you have the right lug nuts. If they are the wrong taper where they meet the wheel, it will cause what you mentioned. Also make sure that the lug nuts are not touching the rotor. They couls be too long.

I vote for wrong lug nuts.

 

did you figure it out yet

 

i did not get the rotors back from my uncle yet, the lug nuts are fine, the wheel doesnt move on the axle, the axle moves within the rotor stud holes. when i get the rotors back i'll check it out.

 

with 5 studs clamping down the rim to the rotor to the axle through the studs each at 90-110 foot pounds, it is highly impossible to have any movement between these pieces unless there is no clamping force due to rim interference or lug nut interference.