I have loved and enjoyed my Z since 2008. It has been a loyal friend to me over many many many miles. The other day I was driving her round and the brake pedal was starting to feel a bit hard. I mean hard in a way where no matter how hard you mash the pedal, the braking force does not increase. I find this entirely unacceptable. I am currently 100% stock. I have refurbished front calipers and OEM stock (but not original) rear wheel cylinders/drums. I think the time has come for me to take a serous look at my brakes. The time for another Zedyone Build thread is YEARS overdue and this is something I have always wanted to do. My options include:

1) Complete overhaul: Front redo/rear disk/larger master

2) Just do rear disk conversion (probably end up doing CV conversion as well from u-joints)

I worry about needing a larger master to handle rear disk brakes.

I have looked at Wilwood conversions and some from silvermine, etc. All appear to be the same thing packaged a bit differently. But I do think the time for 4 wheel disk brakes has come.

is there any advice from my Z buddies on this conversion. I want to entirely rejuvenate my braking power.

Front Willwoods are an easy install. Fronts are where most of your stopping power is. I just put the fronts on all but one of my cars…..they will really put your head towards the windshield. I use my stock Master cylinder with no problem even with the Z with front and rear Willwoods. A hard pedal usually is caused by a lost reaction disk in my experience. Don’t know what else causes a hard pedal.

I have a maxima rear disc conversion available you're interested...

I haven't posted in a while.....hope life is treating everybody with kindness

The single best thing I have done to my braking system was to install a larger 8" brake booster. Best of my memory 69-72's had a small 7" booster. Nissan updated the 240 brake boosters to a 8.5" in '73. They knew the boosters were to too small and corrected the braking problem. You also may want to inspect/replace your brake booster check valve. I did go a larger caliper but never got that great breaking feel until I completed this upgrade several years ago.......This made a HUGE DIFFERENCE in my braking power.

JDM-Car-Parts use to have an upgrade for 69-72 that had the correct bolt pattern to accept into the firewall. That made the transition from a 7 to 8" a breeze for me with no extra drilling.

https://jdm-car-parts.com/products/datsun-240z-1969-1972-8-inch-brake-booster-upgrade-kit?variant=31778739748973

Front willwoods look awesome. Will they fit under a 15" panasport though. I have no desire to change wheels. I love my old panasports.

Reaction disk had occured to me, but I was under the impression those fall out during installation. IF it was right for years, how could it fall out now? I need to go back to the manuals and check.

8.5" Brake Booster Upgrade Kit for Datsun 240Z 1969-'72 New Version – JDM CAR PARTS

they do still sell a 8.5" brake booster that uses factor that its a bolt on with 'no siginificant modifications' . Sounds like it may require the 70/71 Z's master mounting holes be be drilled out a bit like so many other kits.

I will run the vacuum checks on my check valve this week to see if it in fact malfunctioning. I replaced it a while back with a new one when I installed a refurbished brake booster back in 2013 or so.