Nissan Brake Master Cylinder

HondaRue · Post by **HondaRue** » Sat Dec 12, 2009 1:43 pm

I just saw your post... what is the advantage of a booster-less setup?

gda03subaru · Post by **gda03subaru** » Sat Dec 12, 2009 4:09 pm

better pedal feel, and control only thing i can think of

85levin · Post by **85levin** » Sat Dec 12, 2009 4:17 pm

some people like it because it is not as touchy when braking heel toe. personally, i think what makes it more appealing is the cleanliness. though, with the stock master it is a little to stiff for the street in my book. theoretically replacing the stock master with a larger diameter one should only make a stiffer and with less travel. but, you never know untill you try it, might be different because of the internal proportioning valve.

Projectgofast · Post by **Projectgofast** » Sat Dec 12, 2009 8:47 pm

I tried flipping the valve to run it booster less, the pedal was hard as a brick and I could bearly stop, it was almost like having no brakes

Post by **dr.occa** » Sat Dec 12, 2009 9:23 pm

Projectgofast wrote:I tried flipping the valve to run it booster less, the pedal was hard as a brick and I could bearly stop, it was almost like having no brakes

yeah, it's scary huh.

85levin · Post by **85levin** » Sat Dec 12, 2009 9:32 pm

sorry projectgofast. thenagain your name isn't stopfast. jk. thank you for crarifing that.

interested to see how well this master will do with your fc brake kit hondarue.

Post by **dr.occa** » Sat Dec 12, 2009 9:46 pm

really, if you want to go boosterless you'll need to offset the lack of vacuum assistance with leverage by going with a longer stroke cylinder. you can also go larger bore and slightly more stroke but your feel will come from a longer cylinder. you'll want to go with an adj. brake proportioner too. i may do this on the coupe but i need to get the engine done first but that requires money...sigh.

85levin · Post by **85levin** » Sat Dec 12, 2009 9:55 pm

if i go that route i will keep the stock master. i flipped the vacuum valve and it isn't that bad. i'll see if it is something i can get used to.

what parts do you need for your engine? i have mostly 20v stuff, a lot of stuff. lmk, we have all been in that boat.

Post by **nt66** » Tue Dec 15, 2009 4:24 pm

I ran a stock master for 2 years with no booster I like it better once you get used to it. also a smaller master will make the pedal feel easier and give you more braking force it just requires more travel. Bigger master will require less travel but more force to push it down.

Post by **dr.occa** » Wed Dec 16, 2009 1:02 am

nt66 wrote:I ran a stock master for 2 years with no booster I like it better once you get used to it. also a smaller master will make the pedal feel easier and give you more braking force it just requires more travel. Bigger master will require less travel but more force to push it down.

i guess i don't see how that is will. so you're saying with a stock or shorter stroke cylinder you require less force and obtain better feel? i'm not second guessing your setup but the physics doesn't corroborate with that being so. i'm skeptical so i'll have to see it for myself.

Post by **nt66** » Wed Dec 16, 2009 5:33 pm

I'm saying a longer stroke smaller diameter piston master cylinder will require less effort to depress and be more power full. Its just how hydraulics work. A larger diameter master will require less travel to move the same amount of brake fluid but will require a lot harder push from your foot to get the same power.

http://science.howstuffworks.com/hydraulic1.htm

Post by **dr.occa** » Thu Dec 17, 2009 2:04 am

nt66 wrote:I'm saying a longer stroke smaller diameter piston master cylinder will require less effort to depress and be more power full. Its just how hydraulics work. A larger diameter master will require less travel to move the same amount of brake fluid but will require a lot harder push from your foot to get the same power.

ah, disregard my previous post then will. you and i are on the same page. we're saying the same thing. forgive me good sir.