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Of course I am determined to
not have this type of brake system failure again, and we've taken measures to that end, as shown in my last post. The 3" brake ducts, while more than adequate for so many S197 track drivers and racers, were not keeping the 14" front Brembos cool enough on our exceptionally heavy TT3 car (3802 pounds with driver). The Alcon temp strips indicating 490°F temps at the caliper should have been a BIG red flag, which I ignored (and we saw the results of that). That's near the boiling point of most hydraulic fluid and was just not a safe condition to leave the brakes at. So we have upgraded to larger 4" front bumper front duct opening using aluminum tubing and opening up the CS lower fascia from the 3" foglight hole with some careful cutting. You can see the new rear splitter mounting stanchion in the picture above right, and also where the old mounting holes in the splitter were torn out in the crash. That's all of the damage the splitter took.
The new front brake cooling duct openings were routed with 4" hoses but necked down onto the old brake backing plates' 3" ducts. We ran out of time to make new brake backing plates before the ECR track event. I was also curious to see if the larger hoses and front openings would help the brake cooling when even with that smaller restriction at the rotor. Our guys here at Vorshlag got everything repaired, new brake pads/rotors/fluid, nut-and-bolt checked, re-aligned, weighed and corner balanced, and the front brake ducts/hoses upgraded in about 2 days time, then loaded the car into our trailer to verify the repairs at a local HPDE event at Eagles Canyon on May 24th - less than 2 weeks after the crash.
Front Wheel Hubs - Diagnosis and Repair
One of the common wear items on an S197 Mustang, and all cars for that matter, is the front hubs. We recently had to replace the fronts, so I made this little video to show what bad bearings sound like, and what it takes to replace them.
The video above shows what you should do for quick diagnosis, and should be on your pre-track check list. Every. Time. We check the hubs whenever we do any track inspections here, and we've found bad front hubs on Mustangs a number of times. This is actually the 4th set that we've replaced on our 2011 GT since we picked it up in August of 2010. As the grip levels and brake heat go up the lifespan of the hubs goes down. 4 sets of hubs in 4 years ain't bad, considering the lap times this heavy beast puts down and the brake heat numbers we've seen.
We actually replaced these hubs after the ECR event (detailed below) but before we went to Hallett. They were fine before ECR but they weren't afterwards. Vorshlag stocks and sells this
FMS-M-1104-A motorsports hub kit, which comes with the 3" ARP hardened wheel studs installed plus new spindle nuts (which are one-time-use nuts that need 250 ft-lbs of torque to seat). This kit is cheaper than buying new hubs and wheel studs separately, and they are already pressed in place.
We also have a variety of wheel spacers for the S197 and our reduced (17mm) hex/enlarged taper lug nuts for this chassis. These are the same 1/2"-20 right hand lug nuts a Ford uses, but with a smaller hex drive to fit inside aftermarket "lug wells" with a deep socket with more clearance to the wheel. The larger OEM (19mm) hex lug nuts often won't work with some wheels with a tighter lug well (like Forgestars). These lug nuts and wheel spacers are what we use on our car, and they are located in a new section of our shopping cart we have created
here.
Five Star Ford at ECR, May 24th, 2014
We had planned on attending this event many weeks earlier and I was bound and determined to make it back out there in our car, even if I wasn't going to be doing any driving. A big chunk of the Vorshlag crew came out to this Five Star Ford sponsored event at ECR on what turned out to be a beautiful Saturday in May.
We brought our 2011 GT test mule to test the new brake upgrades and to verify the repairs after RA. Amy was driving all day and gave lots of people ride-alongs. Our crew worked on nearly 20 cars during the day, doing a lot of brake fluid flushes (replacing crap fluid), Carbotech brake pad swaps and other various trackside repairs.
Since Amy drew the short straw and didn't get to drive at Road Atlanta at all, this was to be her day of testing and track fun. We mounted up a set of 315mm A6 scrubs and had her on track for over 6 sessions that day - taking runs in all of the Red group sessions as well as some in Blue group.
She took over a dozen riders that Saturday, which Jason and I kept funneling into the right seat of the Mustang - as well as funneling fuel into the Mustang's gas tank.
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