1971 Automatic stopping takes forever
Thread Starter
Cruising
Joined: Aug 2020
Posts: 10
Likes: 0
1971 Automatic stopping takes forever
Hi all,
I have just changed master cylinder and booster, calipers all seem ok as well as pads but still takes forever with my foot all the way pressed down to stop. Is that normal? Is there something I should be trying?
Thanks
I have just changed master cylinder and booster, calipers all seem ok as well as pads but still takes forever with my foot all the way pressed down to stop. Is that normal? Is there something I should be trying?
Thanks
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,137
Likes: 4,248
From: US-PNW
No, it's not normal. The pedal should not go all the way down. Sounds like another go at bleeding is in order.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
BUT to that which is obvious, I have to add in about pulling that silly brake light switch from under the master cyl, mounted to the frame, take the rear brake line to the m/cyl rear section directly, put in a splitter for the front end and run it to the forward section of the master cylinder.....then bleed the brakes.....my '72 had more stupid brake issues, and I finally spotted that damn 'prop valve/switch' removed it and car been fine for nearly 20 years now.......but it is true that I also went hydroboost on the brakes, and aluminum master cylinder, and even my own rack steering......and of course SS lined calipers came with the car some 25 years ago.....and so I put in O ring pistons of course.....OH, I use DOT 5 brake fluid too.....
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Is my vette stock?? HAHA
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if the bleeding is successful and it still doesnt stop, you could scuff the discs and use ceramic pads,
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,221
Likes: 9,357
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
If the brake bleed is successful and it still doesnt stop, then try scuffing the discs and using ceramic pads. I used my car on a track day, overheated brand new organic pads and the next day the pads were stone hard and wouldnt stop a golf cart. A little scuff and ceramics and they stop faster than Rosie Odonell passing an Ice cream truck.
Racer
Joined: Jan 2019
Posts: 360
Likes: 147
The 2 things that stand out are the adjustment of your booster and the fact your pedal goes to the floor. I just went thru hell bleeding the brakes on my 76. Did you use the tool that came with your new booster? It measures the offset from the pedal, and your old booster gives the tool the offset for the new one. Also, did you use the screw in pin to keep the distribution block from internally moving while bleeding? I couldn't get my brakes properly bled until I got one and then I could get them bled properly. Hopefully this all makes sense, if not, let me know. I honestly think you just haven't gotten them bled properly. Trust me, I went thru hell getting mine bled properly!