I'm having problems with my pedal box it runs 3 reservoirs, front, back and clutch. I've adjusted up rear shoes (new cylinders also shoes).
I have Hi spec 4 pot calipers with 2 piece brake discs.
Non servo. Bias valve.

I don't know much about pedal boxes but when I'm putting my foot down at high speeds I feel like there's not enough to stop me.

Brake pads maybe for track spec? Not sure.

I've tried new fluid and bleeding them out.

Could it be down to settings at pedals?.

Starting to get frustrating........