Brake line pressures

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Andrew thanks for the input-on disclaimer this car is for the time being(my project swap duties) going to be mainly a drag car, but most of the drag guys if it stops well enough to make the last turnaround that is OK,so maybe not the ideal for their car. I think the folks here have a better handle on brake stuff. Dustin at Wilwood did also say the pressure weren't that bad.



So you have a fixed caliper on the front(so only use 1/2 the sq in) and a small floating on the rear. The C4 rear is much smaller than the 2.5" metrics I have so they need a little less volume to move. No reason why a GOOD 1"(just a hair bigger than the 15/16" you have) shouldn't have made over 1000psi with as much effort as I used to the Wilwoods on the front. There is nothing for a restriction but the line loc acting as a T for the front brakes and the port for the pressure gauge.

Most of the master seem to use the larger 9/16 port as the "secondary" port-I assume the rears. That is how this MC is plumbed right now,it is on the rear port. An extra 81 TA 4WD master I have has the larger on the front port, as do most of Wilwoods, but the front reservoir is slightly smaller so I assume that it the rear(although I think I have my 78 with an 81 MC plumbed that as the rear and it is well balanced).

My biggest issue is the excessive travel with little effort to get low pressure, with alot of effort at full travel you only get moderate pressures. So with little effort and alot of travel seems like needs a bigger MC. The low drag calipers may be the biggest fly in the ointment also, and may need to be swapped out-heck maybe the actual ratchet E brake TA calipers might do better.