You are talking about disks so the pads are right at the rotor most the time (not retracted). Therefore the only increase in pedal travel will be from the increased volume attributed to larger diameter piston bores. What should not be significant since the pads are already "right there".
The PDWA works on pressure differences, not flow. You would have to have a very significant volume difference for the pressure to be so off that it will shuttle the valve in the PDWA. I would not anticipate a problem.
There should be a lot of background on Toyota calipers on sites more focused on the TR6 so you may want to visit some of those sites. I have a friend whose Chump Car team was considering the Toyota caliper conversion but I don't think they carried it out but with with better brake pads instead.
Doug
--Previous Message--
: Hi All,
:
: I'll be fitting the Toyota four piston
: brake calipers to the
: "Franken-6" (catchy, ain't
: it?).
:
: Question: I have to assume that the
: Toyo brakes will use a bit more brake
: fluid, which will mean further pedal
: travel. Won't that cause the rear
: brakes to lock-up early and continually
: give me a differential pressure warning
: light?
:
: If anyone has the answers to these,
: please let me know of a good
: mitigation(s). (TR6 rear cylinders,
: maybe?). I'm thinking of designing a
: diagonal braking system to avoid the
: differential light problem (messy - it
: would probably make Medusa look like
: she needed a perm)
:
: Ciao Y'awl - Jim M
:
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