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My 81 has 33 bar bias valves from the factory along with 993 calipers I added and it feels much better to use the brakes in than my 89 which still has the 18 bar valve in it.
Even without ABS I can stop my 81 much sooner than my 89 and in a much more controllable fashion to boot.
I have learned that getting too much bias in the rear could cause a bit a drama in the rain (wet) depending on your braking style. Something to think about.
I just added a 55 bar valve to the Coke car, replacing the 33 that was in there. I have run 2 season on the same set of rear pads while going through about 5 sets of fronts. Granted this is track driving which is different than street. I just need to wait for the snow to melt so I can give it a test drive to see if I like the new setup.
I just added a 55 bar valve to the Coke car, replacing the 33 that was in there. I have run 2 season on the same set of rear pads while going through about 5 sets of fronts.
That is weird, as I am now using up fronts and rears at roughly the same rate with a 33 fitted
This is with a mix of track and road - although the track is solely Nurburgring which is not particularly hard on brakes
The road element does include both the Alps and the Pyrenees, not sure whether that makes a difference
I have learned that getting too much bias in the rear could cause a bit a drama in the rain (wet) depending on your braking style. Something to think about.
That is weird, as I am now using up fronts and rears at roughly the same rate with a 33 fitted
This is with a mix of track and road - although the track is solely Nurburgring which is not particularly hard on brakes
The road element does include both the Alps and the Pyrenees, not sure whether that makes a difference
My driving is exclusively on-track with this car and it is primarily threshold braking. But I was just given some advice to NOT use the 55bar on track as 75%-80% of your braking is done up front due to weight transfer (Duh!). So increasing the rear bias may actually reduce the threshold at which once can apply brakes (due to the rears having a tendency to lock up). This makes a lot of sense. And then there is the issue with trail braking, which I hadn't considered.
So I may opt to go back to the 33bar valve. Need to take it out for a spin to see how it "feels". Unfortunately there are still several inches of snow on the ground, so I need to wait no matter.