Hi everyone. Your thoughts please. (BTW not many Help threads. Only one this year)
In any case:
- on the coupe I've been working on forever, I have an underfloor master with dual diaphragm booster.
- disks on all four corners. GM 154 style calipers in front and Wilwood 4-piston rear
- residual check valves front / rear
- 14" Vac at idle (383) - tested at the vac hose at booster location.
Issue
- after bleeding numerous times and without engine running, pedal is very firm
- with engine running, pedal is very soft and doesn't get firm until at least 50% pedal travel.
I have to assume that the booster is working as the very hard pedal disappears after start up BUT why the excessive travel?
Thoughts?
In any case:
- on the coupe I've been working on forever, I have an underfloor master with dual diaphragm booster.
- disks on all four corners. GM 154 style calipers in front and Wilwood 4-piston rear
- residual check valves front / rear
- 14" Vac at idle (383) - tested at the vac hose at booster location.
Issue
- after bleeding numerous times and without engine running, pedal is very firm
- with engine running, pedal is very soft and doesn't get firm until at least 50% pedal travel.
I have to assume that the booster is working as the very hard pedal disappears after start up BUT why the excessive travel?
Thoughts?
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