Well, It’s time for another update with a little “splainin” to go along with it all. Way back about 9 months ago I started looking for some aftermarket brakes for the early C4 corvette suspension. Never having ventured much into this area of car workings other than to change the pads on all my cars in the past, I had no idea what was available out there. All my searches led to nothing. About the time I discovered a local Corvette race team, I stumbled onto one Chevy dealership that raced corvettes that offered a Wilwood setup. I was not familiar with what was needed to do setups like AP and the like. Since I was getting my seats from the local race shop, and they were going to set up my suspension, I asked them if they could acquire the brakes as well. He informed me that he could fab up whatever I needed. About that time I received a message from Fran Hall that he had all that I needed for the brakes. Well since the local shop was only a 2 man operation, and Fran’s standing with me is very high, as he had offered some equipment out of the blue once before for me to try out and see if I could make it work (steering rack). I also was impressed with the caliber of work his shop was turning out at the time. So I opted for him to do the brakes as he could furnish many other suspension pieces that I was in need of, not to mention other GT 40 equipment that I was in search of(axel stubs, CVs etc.). So off went a front and rear upright for him to work his magic. Over 6 months time Fran tried several approaches to solve the upright issues that the C-4s presented. Some of my equipment was rather worn and several pieces were replaced.
When all was done, Fran was ready to ship the parts, new pieces and several other parts, which I had requested. With his commitments (unbeknownst by me) to prepare 4 cars for Carlisle, some delays occurred and then there were some mix-ups with the individuals in shipping, and after many weeks, only part of the parts came in. There were then several miscommunications between us. I later learned Fran’s server was down and he didn’t know I had tried several times to contact him.
Well, that’s all been straightened out and is water under the bridge. All is back on track, and Fran has sent almost all of the remaining parts (some he didn’t know I wanted, and some shipped to who knows where). I did get the brackets and spacers, and bolts and taps needed to get the brake parts together. Now outside of some minor alignment issues the calipers are in place.
I discovered while installing the pieces that the bells, due to the replacement of the parking brake with Fran’s spacer, are now reversed. The deep bell on the stock setup is on the rear, and the front is shallow. With Fran’s setup the deep is on the front and the narrow is on the rear. Really threw me a curve when I first started to install them. There is a parking brake option, which I will probably add later on.
There are a few areas that need notching. The fronts need the steering arm and the mounting for the old dust shields to be slightly notched. The rears have a section of the upright that needs slight reliving.
I think Fran has a business plan that is really quite unbelievable, in that he has things that he can adapt to other brands, or supply to the other brands. He isn’t afraid to step out there and give a lending hand. It could lead to other business/sales/ market share. In my case, the steering unit he offered was just out of the blue. May have been to adapt to other brands or scratch builders, as that is just about what mine was, or is. The brakes are basically from his own design of front end, which was modeled after the corvette. We even tried to adapt his upright to my unit, but it just wouldn’t work engineering wise. The brakes he has supplied will give him a product that will work for those units like the DRBs, which don’t have many options if they still supply the older units. Could be wrong on this, as they may have upgraded by now to the C-5. Several of the C-4 aftermarket parts, like the wheel bearing and hub assembly have been dropped. Fortunately some of the C-5 stuff is adaptable.
I do remember the thread on the test that Peter Delaney had to go through for rego. They showed the lasting ability of the stock brakes. Before that time I had read on several Corvette forums how the stock setups would not last on the track, and suffered badly from fade. I was always impressed with the suspension on the Corvettes and always thought I could get something aftermarket to work with it. I will admit that I was after a little bling as well. When I couldn’t find anything I thought I was going to be stuck with the stock setups. After having the parts in hand, I can see how the other stuff that wasn’t widely circulated (Aps etc.) would work. It is geometry and aligning.
Since getting the parts, I have discovered one rear bearing to have too much play and will be replaced. The trans is out for the spray bar fitment along with the slave cylinder placement, pilot bearing, etc. I believe it will be a 993 setup. Could be wrong on that. The Porsche shop foreman at Jim Ellis is doing this one for me. One of those areas I have no experience in, much less what is required.
I have also discovered that I may have to alter my gauge arrangement in that I opted for manual gauges for the water, oil temp and trans temp. They all may be too short without them being a little unsightly leaving the dash, so I may have to go to electrics instead. That may work to my advantage, as I have to have several functions that have to be linked. There is the low oil pressure (7psi) linked to the fail-safe inertia switch for the fuel pumps, oil temp and pressure warning lights along with the gauges. There also has to be another oil pressure valve (20 psi) for the accusump.
The really good news is that the car is now able to come down off its stand after 3 years and get to the shops that are going to do the finish work, that being the welding that I could not do, or get to, and final engine assembly and fire up (which I feel should be done by the experts). I have put too much money into the setup to screw things up. This has to be done around the shops other commitments so it may be a week or two.
The LineX shop is ready to do the undercoating and probably will see the car first if the weather will break long enough to get it over there. With that done, all the finish work including carpets, interior bulkhead and door upholstery, can be done. Lots of little things like regrinding the mounts for the shocks, as they are too tall for the QA-1 shocks. This means they will have to be re ceramic coated. I also found that with adding the stainless to the bulkheads, the trailing arms are now too long and will have to be cut and new appropriate end adjustments added.
What this all means is that things will move much more quickly (finally), and the end of the tunnel can’t be that much further ahead.
Bill