As Paul mentioned, this will go in the Tech Section once it has been fully resolved.

If anyone is using a different set up and can provide the necessary details, please post them here or let Paul know so he can add them. Being an excel spread sheet you can always add things yourself once it has been posted, but I figured the more to compare initially, the better.

Having a standard set up for comparison would be good as well, but I think the calculations for the drums was a bit of an issue wasn't it Paul? If anyone has some insight on this, again, leave a note here or e-mail him.

Thanks.

Thanks Simon.

I would assume there to be a proportioning valve of some sort in the rear drum circuit. So in theory , if the front brake torque and the bias front to rear was known, then the rear brake torque for the drums could be calculated. If the original proportioning valve was maintained then the rear torque would be the same irrespective of M/C size (although the initial force might alter until the line pressure reached the "knee" set point of the valve).
If the original proporting valve needs to be removed, I would stongly recommend replacing it with an adjustable one to retain the brake bias with a front brake or M/C upgrade. On that point, I would recommend a proportiong valve for the rear disc set-up also to raise the efficiency of the braking system at lighter brake applications.
Peoples comments / ideas are welcome [^]

Agreed. Of course.

Thanks.

I will use it as a basis for my calculations.

I have a bias between the two 0.625 M/C's.

That fits in with the sheet. mmmmm

I think a change of pads may help too.

What pedal ratio are you using - this may be the problem as the standard predal ratio may not be giving you the output you require (if that's what you're using).
What size piston bores does the Corvette calipers have?
2 pistons?

The pedal box is a modified Escort item. I will measure the ratio.
The Callipers are 2 piston floating type, I will check on the bore size. No worries.

Mark,

With moderate pedal pressure you will need 1200psi + from your master to provide efficient braking.

Pressure = Pedal force / M/C area.

Your pedal ratio will have a direct relationship to the output of the M/C.

To be honest, with the 0.625 M/C I thought you would have plenty of pressure unless your caliper bores are quite small or your pedal ratio is not right. Either one will give you a hard pedal needing a decent push.

Well it's been a while but a significant event has occurred - the shell is finally on the rotissorie!
After a major redesign the car is up, on and rotating
Time to start playing with the car and making some REAL progress [:I]



Download Attachment: Side.JPG
94.88 KB

Download Attachment: Front.JPG
95.74 KB

Some work to do here...........

Download Attachment: Underneath.jpg
62.47 KB


Also have bolted up the adapters for the RX7 calliper / Pug rotor combination. At least I know the idea works now - thanks Pete

Download Attachment: Brakes.jpg
60.1 KB

Download Attachment: Adapter.jpg
71.61 KB

No Probs

Keep on going Paul...........

I too, have soughted out my brakes.

OK, well this project has officially come to a close!

But, keep an eye in this section......