Porsche 996 caliper project is under way by Philo

4 minute(s) of a 34 minute read

12-22-2011

I already have an update. The prototype bracket for the e31 rotor that we are trying to fit is available off the shelf. This is really great news and will allow me to throw these brakes on my car and do some testing in early Jan. However.., to get the off the shelf brackets to fit the caliper mounts need to be shaved. Something the e36 M3 race guys do as well I'm told. Ultimately though I think it would be best to have a proper bracket made so we'll have a simple bolt-on BBK. Shaving mean sourcing a machine shop.., run the risk of having the machining improperly performed, etc.. This just adds to the cost of the BBK and adds a possible headache. 

So.., I'm enlisting feedback from everyone. Are we ok with machining calipers or would we rather have a proper bracket for a direct bolt-on with the e31 324mm rotor ?

Here's some answers thus far.. 

Coldswede wrote:

How much weight are we talking about for this conversion?

Not sure yet but will weigh the 996 calipers once I finish prototyping. The've got to be lighter though..., the stock M5 cast calipers are heavy pigs.., and the 7 series upgrade is even worse. 

n all-in kit for the win. Purchase kit with bracket, rotors, calipers pads, lines, sensors. Oh, and the brake lighting upgrade kit so when these BIG BRAKES are applied the drivers behind will know the car is stopping right now!! Shocked

The plan as of now is to just provide the brackets and all the information needed to build your own BBK. I may have to include brake lines since they will be unique to the Brembo 996 setup. The nipple faces differently then the stock M5 calipers. Haven't looked into the pad sensor yet. Regarding pads I'm told there are countless pad choices. Another reason the 996 calipers is such a great unit for this BBK. 

Be sure to let the Yahoo group know you've started a thread on mye28 too.

Thanks.., will post this evening. 

I should have some mockup pics by tomorrow. I also asked my buddy to do the engineering for a custom bracket so the calipers do not have to be shaved. 

Question, what do you guys think the percentage split is of e28 and e24s owners running 17" wheels ? There may be a minimum for machining the brackets so I may want to do both all at once.

12-29-2011

I got a report back on Tuesday. The test calipers have been shaved and mounted to the hub. Clearance is tight but they say the fitment is pretty normal and works well with the 324mm E31 rotor. The hub and strut still had the splash shield mounted and I don't think it was removed prior to fitting. So it looks like no modifications are required to the splash shield, which was a concern of mine. I have some pics of the test fitting and will post them soon. 

Still waiting to hear back about how the brackets will get made. Not sure if ST can make the custom brackets, one of their contractors, or if I'll have to find my own machine shop. I will have a digital file of the bracket design that I can take to a machinist and have them make a CNC file from. But the upfront cost will be rather pricey so not sure which way I will go just yet. 

Things are progressing...