I wanted to revisit this after the someone started a similar thread and I had an event to drive my car in an event.
Through the event I slowly moved my bias forward over the weekend which I felt made the car feel more stable. After looking at the pedal post event, the balance bar was moved to about 75% of being fully toward the front master.
I just came in from the garage and was looking at the stroke of each master cylinder. The rear from rest to full lock up moves almost half an inch and appears to be rock solid when it stops, but from there, the front master moves another 3/8" ish and is pretty spongy. So the pedal is having to travel most of its distance to make up for the front master.
Since I used Tilton cylinders, I asked him where him would start given the data I gave from the front page and he says from a spreadsheet standpoint, I should be running out of rear brake and I should be running 13/16" (what I have on the rear currently) on both front and rear.
I am trying to figure out why the discrepancy between what Cosworth and Tilton recommended. I ran the calculations on my computer but I don't understand what I am looking for in the numbers.
If I had more money to throw around I would buy another 0.75" and try it on front and rear and another 13/16" and try it on the front. But that isn't feasible as the last event nearly gutted me and I would still like to make another in Sept of this year.
So how should I go about this? What am I looking for in the numbers knowing my current setup and that I moved bias from 50/50 f/r to 75/25 f/r? My initial concern is if I go with a larger front cylinder, I will loose brake torque for the front so it will be more rear biased. If I decrease the size of the rear cylinder, I will increase brake torque in the rear and once again move bias rearward. But if I decrease my front master cylinder I will increase front brake torque, moving bias forward, increase pedal travel, but will create a larger discrepancy between the distance each master cylinder will travel before it reaches lock up.
Is my thinking correct?