Front brake caliper pressure

[Dwight]

A few years ago Gene brought his 64 Plymouth and asked me to change the brake fluid to Dot 5. I did and a month later he returned and ask me to change it back to Dot 3/4 because the breaks were to spongy. So back to Dot 3/4 and he has been happy for several years.

I think that in Cobras we need to change the fluid every three or four years.

Mike brought his Cobra in and wanted me to work on the brakes. I did a test drive and they were BAD. You could not stop that car in 300 ft (well maybe 100) but it was scary.
I took it back to the shop and changed the fluid. Then I could slide the tires. Never have I seen such a huge change in brakes.

I use Dot 3 or 4 synthetic brake fluid in all my cars.

[DanEC]

Originally Posted by FredG

My C2 corvette used DOT 5 as per their recommendation when I swapped out the calipers for ones that were stainless steel sleeved. Corrosion was a problem in the originals.

Mine too - never noticed any issues from it. Less stressful when the inevitable caliper piston seal gives out and I have to rebuild a caliper. At least I don’t have to worry about fluid eating up the paint on my detailed chassis. But I do use DOT 4 in my ERA.

[classical glass]

After reading through all the replies (some were interesting) I still don't know if 760 lbs pressure at the caliper is good or not. Any help on this issue?????