xschop

I'm going to chronicle what I'm doing to a 1-off BBK for the 86 951. Thicker yet Light-weight Wilwood rotors and billet hats.....10.5 LBs total compared to the all steel 951 rotor at 16.2 Lbs.......Built a set a few years ago and forgot what I did LOL. Dejavu......

Mill down the inner rotor sweep nodules to clear the 32mm thick rotor....



Take off 150 thousandths from the spindle ear interfaces....



Drill and countersink the hat (1.5 Lbs) to the Early Porsche hub PCD 127mm...



Drill and tap the Billet hat for 8 x 7" PCD for the Wilwood rotor (Weighs 9Lbs)

xschop

What type brake fluid did the 86T use? I'm replacing the piston seals and re-installing the pistons.

xschop

I had to trim 1mm from each side of the pad shims for the thicker rotors....



I always use Red Loc-tite on my Rotor/hat bolts, but I went the extra distance and cross-drilled each one for safety wire for whoever acquires this set.....



I lightened the hats even more by cross-drilling the thicker portions on the same 5 x 127mm pattern......T-6061 T6 hats will keep the heat off the hubs/bearings....

xschop

New piston seals installed and New OEM pads and Fresh VHT ceramic caliper paint. Also throwing in a fresh tube of Red Loc-tite for the hat/rotor bolts. Also changed the Hub/billet hat bolts to 5/16-24 Fine thread with full metal Locker Nuts just like the factory setup.... $550 shipped anywhere in the US-48....Just PM

xschop

Checked Shipping cost.....$550 Shipped ....US-48 ONLY

86 951 Driver

Where do you get replacement rotors at?

DFASTEST951

I second that question and is this only the front set or the whole set?

xschop

This is a 1-off upgrade for the front ONLY. The Pistons are 36 and 38mm with new piston seals installed.
Everything is included for 100% Bolt-On...... Brand new Wilwood 11.75 x 1.25" directional rotors...

Wilwood 160-2898 1.25" X 11.75" X 7" Ultralite 8 Bolt Brake Rotor
$36.68

Wilwood 160-2899 1.25" X 11.75" X 7" Ultralite 8 Bolt Brake Rotor
$36.68

piperporsche180944

Looks great!!!

xschop

Still Available..... $525 Shipped US-48 ONLY

ausgeflippt951

What did you use for the top hat?

Looks great!

xschop

Billet 7075 aircraft aluminum

ausgeflippt951

Ha sorry should have been more specific.

Did you source the top hat or did you custom machine it. I'm aware it is Al....

xschop

I machined it from a 911 top-hat I had on the shelf for a couple years. Removed even more weight from it with the perimeter holes that will radiate more heat away from the hubs.

These hats do not exist elsewhere as they are 8x7" PCD specifically designed for the Wilwood rotors. You could mount a 13" Wilwood rotor as well and adapt bigger calipers later if you choose.

odurandina

i've been getting lousy braking to the rears. running GTS brakes in the front, i can get them to lock up. but not the rears... also i need to push down pretty hard to get good braking.... on the left rears, the rotors aren't shedding the small amount of rust that builds up near as quick as they should.... i haven't changed the fluid in a while [like, maybe 16 k miles]... still, i suspect my 19 year old rotors are, [as in, of course they are] shot.

running a 5-33 valve, but still never great braking back, there.

wondering if i'm better off with beefier rear brakes. preferably aftermarket.

thoughts ?