Squishy
 

I've had an ever increasing difficulty dialing in my brakes.

Seems no matter what I do the top half of the pedal is squishy.

I've bleed and bleed the brakes, not sure if I should pull the master and re bleed it.

It's a Belair with a Dutchman/willwood 4 piston front conversion.

I may also not be creating enough vacuum, as the cam makes the idle pretty lumpy.

Considering pulling the vacuum booster and going to manual, can't decide if I'll need a new master.

And or the advantages over manual vrs power.

I eventually will do some auto crossing with it and heavy river road use.

Just trying decide my next move, any suggestions are greatly appreciated.

You need to measure vacuum.

Sounds like trapped air though.

High spots (low-high-low) trap air, caliper mounting, bleed position, and line routing could contribute.

I'm a manual master fan, mainly due to motorcycling background. I prefer the feel/feedback and simplicity.

Thanks! I'll definitely get back in there and see if I can find any more air.
I like the feel of manual brakes, just never done on a car as large as my '55, mostly old bugs.

Can I pull the booster and remount my master to make it manual?

Or would I need a different master cylinder?

It gets a lot of street/day to day traffic use also

I'd go with a Wilwood manual master, probably 7/8" bore, but you need to run the numbers (caliper volume) to determine. Give Tobin at Kore3.com a call, he'll deliver accurate and honest solutions.

FWIW - My car is 3460 lbs with 245/275 200TW tires. C5/12.88"/Hawk HP+ pads front and Dynalite/11"/BP20 pads rear and feel they are 'respectable' brakes, I've driven a C7 Z51 relatively hard and was very impressed with the brakes though they didn't demoralize my perception of my system.