sentra brake booster in s13? hlp - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Gription · 09-24-2011, 01:18 PM

I had an abs brake booster in my s13 and it positioned my brake lines real close to the manifold, so I got a sentra brake booster for cheap to try and get everything away from the heat. Looks like this now.

I've heard of people doing it before but im not sure if there is more to it. The travel distance of the push rod that enters the master cylinder is the same as my stock booster but my brakes feel like ass now. like, extremely soft. I tried bleeding them but it didn't seem to help.
Has anyone here done this before?

WYT R1CE · 12-18-2011, 07:28 AM

bump because i have the same problem. the pedal is bleed and hard however when braking it seems like there is no booster you have to really push the pedal to get the car to stop. im debating on a new booster or trying the s14 booster.

codyace · 12-20-2011, 10:30 PM

The internal diaphram is undoubtedly wrong with the Sentra one...gotta remember how puny the stock B13 and B14 brakes are. That probably explains your mushyness.

MaxTheRabbit · 01-12-2012, 10:25 PM

Wouldn't a booster set up for punier brakes make the pedal harder not softer? I mean no booster the pedal is super hard so wouldn't the pedal effort decrease as the booster size increases? Something doesn't add up here. The OP had a soft pedal but white rice had a excessively firm one...

codyace · 01-12-2012, 10:36 PM

Larger Diaphram should indicate stiff pedal, and vice versa. Just like the Master Cylinder or Hydraulics.

MaxTheRabbit · 01-13-2012, 07:28 AM

A larger master cylinder piston is moving more fluid per unit of travel so it takes more force to move it. A larger diaphragm is holding more vacuum giving the atmosphere more surface area to assist. Unless I'm totally missing something here that would make the pedal easier to push because you've got more force being exerted by the atmosphere working in concert with your foot.

09-24-2011, 01:18 PM	#1
Gription Zilvia Member Join Date: Mar 2009 Location: South FL Posts: 297 Trader Rating: (4) Feedback Score: 4 reviews	sentra brake booster in s13? hlp I had an abs brake booster in my s13 and it positioned my brake lines real close to the manifold, so I got a sentra brake booster for cheap to try and get everything away from the heat. Looks like this now. I've heard of people doing it before but im not sure if there is more to it. The travel distance of the push rod that enters the master cylinder is the same as my stock booster but my brakes feel like ass now. like, extremely soft. I tried bleeding them but it didn't seem to help. Has anyone here done this before? __________________ www.gentlemenstreetclub.tumblr.com \| www.mattpommell.blogspot.com

12-18-2011, 07:28 AM	#2
WYT R1CE Zilvia Junkie Join Date: Apr 2005 Location: global Posts: 441 Trader Rating: (0) Feedback Score: 0 reviews	bump because i have the same problem. the pedal is bleed and hard however when braking it seems like there is no booster you have to really push the pedal to get the car to stop. im debating on a new booster or trying the s14 booster. __________________ Team Sumospeed

12-20-2011, 10:30 PM	#3
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 36 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	The internal diaphram is undoubtedly wrong with the Sentra one...gotta remember how puny the stock B13 and B14 brakes are. That probably explains your mushyness. __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

01-12-2012, 10:36 PM	#5
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 36 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	Larger Diaphram should indicate stiff pedal, and vice versa. Just like the Master Cylinder or Hydraulics. __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

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01-12-2012, 10:25 PM	#4
MaxTheRabbit Zilvia Member Join Date: Feb 2005 Location: Richmond, VA Posts: 206 Trader Rating: (16) Feedback Score: 16 reviews	Wouldn't a booster set up for punier brakes make the pedal harder not softer? I mean no booster the pedal is super hard so wouldn't the pedal effort decrease as the booster size increases? Something doesn't add up here. The OP had a soft pedal but white rice had a excessively firm one...

01-13-2012, 07:28 AM	#6
MaxTheRabbit Zilvia Member Join Date: Feb 2005 Location: Richmond, VA Posts: 206 Trader Rating: (16) Feedback Score: 16 reviews	A larger master cylinder piston is moving more fluid per unit of travel so it takes more force to move it. A larger diaphragm is holding more vacuum giving the atmosphere more surface area to assist. Unless I'm totally missing something here that would make the pedal easier to push because you've got more force being exerted by the atmosphere working in concert with your foot.