Quote:
Originally Posted by coachwinbush
mark can you tell me the advantages of your rear end
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Sorry this will be a bit long so bear with me.
I wanted to add ABS to Red Devil when I built it. The first thing you need for ABS is good wheel speed sensors. I planned on using the DSE front sub frame so front wheel speed sensors were easy. DSE uses C-6 Corvette knuckles with bolt in C-6 hubs with built in wheel speed sensors. On Red Devil I started out with the DSE C-6 bearing in the front and a cobbled Mustang style Currie Tone ring set up in the back. Currie made this set up with the “Big Bearing” style axles and I modified all of it to work. See attached photo.
The tone wheel set up would work for low speed stuff but would drop out under high speeds and load. My theory is above 100 MPH and over 1 G caused the air gap to change enough to set a fault code in the ABS module. At the 2010 OUSCI event it worked for the Auto Cross and the Speed Stop but dropped out on the road course. Intermittent ABS is almost as bad as no ABS. I had things I did not like about the tone wheel / “Big Bearing” set up:
Intermittent signal and signal drop outs
Rear axle seal leaks
Brake knock back
Poorly integrated park brake set up.
I needed to design something new. The stock front wheel bearing worked great. I set out to design a way to put a C-6 bearing on a Ford 9 inch. The setup I wanted to design would accept all the stock Corvette parts to make it robust. The bracket we designed allows the use of a C-6 ZR-1 Bearing, Stock C-6 park brake, Any C-6 brakes will bolt on and I made an axle seal system that does not leak.
The Delphi ABS system I use needs a passive wheel speed sensor the ZR-1 bearing uses active wheel speed sensors that work with the Bosch ABS system. I worked with SKF to make me one off ZR-1 SKF bearings with the passive wheel speed sensors.
In 2011 I installed this new axle set up in Red Devil and it works flawlessly:
No ABS signal drop outs
No brake knock back
No axle leaks
Robust park brake
The parts required to make it all work:
Steel Axle ends that weld to the Housing ends (DSE and Myself have fixtures now)
Aluminum Spacer (Sets up the proper spacing for the caliper offset)
C-6 Corvette Park brake parts
C-6 ZR-1 bearing (Off the shelf will work if you don’t have ABS)
Custom axles (Strange, Moser and Sway-A-Way have built them for me)
2013 Full Size truck axle seal (GM made millions of these so easy to get)
Corvette axle nut.
I have this parts running on Red Devil, Mayhem and my heavy test vehicle (Chris Smith’s C-10 pickup). Chris was having issues with brake knock back on his truck and this system fixed his problem in the rear. Now his is flexing his front uprights.
I originally designed this to fix my problem so I was not worried about cost because this stuff is all one off. I have lost track on how much CAD and design time I have in these parts. It looks simple but the devil is in the details. I have made a few parts and Kyle at DSE and I are working on selling them through Detroit Speed.
When we finalize the details I’ll let this community know.
This is my third itteration with lightning pockets added. I'll use these on Hellfire.
This is the alignment tool to set the steel bracket square to the housing.
The Full Size Truck axle seal
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
Linear Mode
