On the brake issue, I can offer a conversation I had with the US Alcon road racing rep regarding brakes for a race car I am building (not a GT-40). The car will weigh approximately 2600 lbs, front engine but the engine is set back well behind the front axle line. You could consider the car similar to a Trans/Am car if you follow that series but with a '68 Mustang fastback body. I just could not afford to pay $2000 US per caliper for the high end Alcon/Brembo/AP Racing calipers that were marketed toward my application. So after a bit of looking around I noticed that the calipers marketed towards NASCAR were considerably cheaper even when new. NASCAR brakes are usually offered in kits aimed at the various types of tracks. Short track / road race, Intermediate, and Super Speedway. Of these the short track/road race have the most demanding braking requirements and as a result cost the most
The top of the line Alcon short track setup costs $4750 US and includes 4 calipers, 4 rotors, and 4 hats and all the rotor mounting hardware. Of course the hats would be specific to a NASCAR car, just wanted to give an idea of price. Their one step down short track package with titanium pistons is $4100 (F-Type front caliper). However that is still a lot of money. The solution is to look for used calipers from a WC team. I recently paid $245 US for two Alcon F-Type calipers (with Titanium pistons) from a WC team. All they should need is a new set of seals at $5 piece.
Before buying these I talked to the Alcon rep about them and whether or not they would be OK for my application. Since these are designed for NASCAR where they can only use a 15" rim, the max rotor diameter that can be used is 12.625" but 1.38" thick. I was assured by the Alcon rep that I would not run out of brake with this setup. And as a bonus can run regular stock car size rotors (ie cheap) and pads (again cheap). I was a little worried that the rotor would be too small. But he said I would not suffer. Further below is what a Wilwood rep said regarding rotor size:
<BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>Personally, I feel a 14 inch rotor is ridiculous. Generally you compromise the integrity of the rotor to have it so large and then trying to get the mass (weight) into an acceptable range. I prefer shorter / wider rotors (12" to 13" range) as they tend to be more stable under excessive heat cycling.
Nowadays with al the excess friction potential that the current racing pads have increasing the rotor diameter for torque value is not necessary.
Carl Rupprecht
Sales & Technical Representative
Wilwood Engineering
<HR></BLOCKQUOTE>
Back to the NASCAR calipers, if you are looking at used ones look for Type F for the front, part number CAL6665S05 with Titanium pistons. For the rear the Type H, part number CAL6346. Note neither of these calipers have dust seals on the pistons and therefore probably not a good choice for a car that sees lots of street use.
Question on the pin drive hubs above. What spindle do these require for the full conversion (not the bolt on)? I have been looking at putting pin drive (Centre Lock) hubs on my car, however the only source I have been able to find is Hoerr Racing. They use a common stock car spindle (Howe 5x5 stubby spindle). However to do all 4 corners would be about $4200 US including the nuts. What is the cost for the UK ones?