I have the Wilwood Drilled & Slotted brakes on my FFR '33 & it seems like a constant battle in keeping them bled & operating correctly. The brakes will work amazingly until the first drastic temperature drop & then they go to nothing. There are absolutely no leaks in the system, the reservoir stays static, no fluid in the floor of the shop or along any of the lines - & again, when the ambient temperature is warm to hot, they perform as expected. When the temperature changes, I have to rebleed them & then they will work fine again, so it has to be a bleed or air in the system issue. I have reached out to Wilwood directly on this & they assure me they have never heard of ambient temperature affecting the brakes, however I spoke to a mechanic & he compared it to those annoying tire pressure alarms when the temperature changes. If you have air in a pressurized system & the temperature drops, the pressure in the system will drop as well. Wilwood's specific advisement on their FFR Balance Bar system has been this...

"With a balance bar pedal and dual master cylinders you really need to do a three person bleed to get all the air out. If you don’t do one front and one rear caliper at the same time, you won’t be able to get both master cylinders to stroke fully. Theres a video showing how to do it here - https://youtu.be/jELllXdtjdc"

I have had the car on the road for 5 years & 32k miles & have tried bleeding the brakes everyway I know how & I might add, to a point that I feel they are successfully bled - that is until the temperature drops again. I have bled furthest to closest, manually & with a vacuum, I have bled front & back at one time, manually & with vacuum, etc..

Just wanted to see if anyone else had experienced this?

Thanks in advance!

J