qfrog Ti20

Pictures of the unique 996/B8 brake system on my sedan.

The most obvious change beyond calipers with some luster is how there are no vane inlets on the outside rotor surface at the hat. Typically the B5 with OE rotors will have the vane inlets on the outside, mine are on the inside where it is easier to duct air into the rotor for cooling. I'm still using my PureMS backing plates and air ducts.

I have not even taken the time to bed the pads in yet, right now the pads are just OE Porsche textar. The system has ~35mi on it to date.

<img src="http://qfrog.smugmug.com/photos/486367691_4dcdd-L.jpg">

<img src="http://qfrog.smugmug.com/photos/486366707_PcKD2-L.jpg">

<img src="http://qfrog.smugmug.com/photos/486367983_CGuhD-L.jpg">

<img src="http://qfrog.smugmug.com/photos/486368587_JBXAN-L.jpg">

qezel

so jealous

bassed-ndzmorezone5

Looks really nice Phil. It's certainly unique.

@wesome

*bows* you sir have an amazing setup all round

Chicktronic

hows the car runnin? i ran into you on 280 last summer and the car was movin pretty swift with low boost. did you crank it up yet?

TEB

What did you use for carriers? Any other mods required?

qfrog Ti20

The B8/996 setup only works if one has the larger 82mm or possibly 85mm front wheel bearings. If you don't have those bearings you will need different wheel bearing housings which accept said larger bearings. 82mm bearings are less costly than 85 so I went with 82mm. These are required as these bearings accept the required hub. The hubs are required as the B8 rotors are about 6mm taller than stock B5 rotors, the hubs are just about 6mm taller too.

A possible alternate application for the bracket is using standard hubs with B5 S4 front rotors. I prefer the B8 rotor to the B5 S4. The bracket is not tested for this application and it may require a tiny bit of adjustment. I did a brief test fit with a 996 caliper, B5 S4 rotor and my custom Apikol brackets on my Avant.

<img src="http://qfrog.smugmug.com/photos/464688931_Vswb9-M.jpg">

<img src="http://qfrog.smugmug.com/photos/464688990_7GT3V-M.jpg">

<img src="http://qfrog.smugmug.com/photos/464689050_Jzcyu-M.jpg">

The quick measurements I took during the pics above are as follows.... and this was with a modified caliper (reduced length brake pad pins for rotor expansion room).

Outside pins (modified)
Upper 1.45mm
Lower 0.889mm

Inside pins (stock)
upper .254mm
lower 0.82mm

My caliper may not have been perfectly seated and that would account for the slightly skewed measurements I took.

I think as stock the caliper has just about 31mm of space between the inside and outside pins. The stock 996 rotor is 28mm So if we go with what Porsche allowed ~1.5mm should be allowed between the rotor and pin on each side. Thus for 30mm rotors ~33mm of spacing between inside and outside brake pad slider pins (what the pad rests on and slides on). For my 996/B8 setup I think I ended up with 1.35-1.40mm of clearance on all of the pins before I was satisfied.

Clearly the bracket places the caliper within a fraction of a millimeter of the ideal. Ideally the upper and lower clearance numbers should be equal both inside and outside. As stock the pins in the caliper may not be exactly the same from pin to pin, I had also used sand paper on mine to clean off the surface which is parallel to the rotor's friction surface.

If one was really interested in using these brackets on an A4 with stock hubs they would need to do a little bit of test fit work to verify my findings and then make adjustments as necessary, those adjustments are likely very minute if at all.

qfrog Ti20

I'm just starting to figure out how to make the brakes work well. I've been tinkering for years and I've got some more work to do before the system works as well as it can. Things are just starting to get fun.

qfrog Ti20

Rears are 300x22mm with B5 S4 calipers.

qfrog Ti20

Unique, yes... hopefully they will also be effective.