Brakes

Jduck · Aug 1, 2016

YJ body with stock booster and unknown make of ford master, has 1 3/8" printed on side for bore size I'd assume. Have 2lb residual valve on front line, and adjustable porp. valve on rear line. Chevy 60 front with stock calipers, 14bolt rear with 3/4 ton calipers. It stops well but has a shitty pedal...soft and excessive travel. Was thinking I needed a smaller bore master so I picked up a 99 dodge 2500 master with an 1 1/4 bore but now Im second guessing if that will make any difference or if I need to go up in bore size instead of down...

gottagofast · Aug 1, 2016

Smaller bore will make pedal lower not higher

30th6 · Aug 1, 2016

Re:

I have the dodge Mc on mine and it stops great with a good pedal feel.

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RustyC · Aug 1, 2016

I ran a e350 mc on a factory yj booster and the same calipers as you for a long time with low gear crawling and got used to mediocre brakes. My wife started driving and I got instant feedback about how shitty the brakes were. I picked up and superduty hydroboost and mc. The damn thing has kick ass brakes for sure now and everybody who drives it loves them. $.002

Rjhoward32006 · Aug 1, 2016

EDIT:

myself i said the wrong thing. I had a really hard pedal and couldnt get enough pressure at the caliper so i went down in bore size to make more pressure, but flow less volume.

Here is a video that helped explain it to me

http://www.onallcylinders.com/2013/10/29/video-master-cylinder-bore-size-affects-braking/

Dwalk · Aug 2, 2016

I switched to these on the front with stock YJ M/C and booster, better than ever now.

http://www.tmrcustoms.com/store/index.php?main_page=product_info&products_id=1622

Jduck · Aug 3, 2016

Dwalk said:
I switched to these on the front with stock YJ M/C and booster, better than ever now.

http://www.tmrcustoms.com/store/index.php?main_page=product_info&products_id=1622

I think that's going to be a better idea than the guessing game of what master cylinder. I've broke front brake lines twice and crimped them off, after doing that the pedal felt the best with only three calipers grabbing so that would indicate a volume problem id think. Probably going to go with this kit from Shawn https://lugnut4x4.com/product/dana-60-front-34-ton-disc-brake-conversion-kit/