300zx brake sux ballz - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

tmsilvia · 12-30-2008, 04:00 PM

hi, i just install 300zx calipers all around on my 95 240sx. for some reason, the brake just wont lock up. i feel like i have no brake or pressure. i install a 17/16 300zx brake master and i have a auto booster, the padel is really really stiff and i could only brake like 50%,so i switch to 1" brake master and it still the same old shit. if anyone have any answer, please help. cuz i have no more idea

punxva · 12-30-2008, 04:01 PM

i know this is a stupid question... but did you bleed them all the way?

Mister.E · 12-30-2008, 04:05 PM

Quote:

Originally Posted by punxva

i know this is a stupid question... but did you bleed them all the way?

this would be my guess. it sounds like you have all of the correct supporting mods to go along with the brake upgrade so i would just recommend bleeding them again.

samplesurf · 12-30-2008, 04:23 PM

Quote:

Originally Posted by E Double

this would be my guess. it sounds like you have all of the correct supporting mods to go along with the brake upgrade so i would just recommend bleeding them again.

he said his pedal was really stiff, air in the brake system does just the opposite so i doubt thats the culprit

Mister.E · 12-30-2008, 04:25 PM

maybe due for a caliper rebuild then? maybe the pistons are seized and not pressing the pads to the rotors

theronin · 12-30-2008, 04:51 PM

yeah, if youve swapped MC's and still havin the prob, id take a look at those calipers ur runnin. while ur there just spring for some speed bleeders and save yourself some time.

Def · 12-30-2008, 10:02 PM

Might be a dead booster. Follow the FSM troubleshooting.

Sileighty_85 · 12-30-2008, 10:19 PM

did you bench bleed the MC and could be combined with the dead booster,

Also did you install the calipers with the bleeder valves pointing up?

*burnsauto* · 12-30-2008, 10:23 PM

and you sure you have good vacuum running to the booster? Low vacuum can cause a high, stiff pedal.

s13envy · 12-30-2008, 10:29 PM

if you have a still pedal and can't lock up the brakes then i'd check the booster. no other reason for there to be a stiff ass pedal

g6civcx · 12-30-2008, 10:57 PM

Quote:

Originally Posted by tmsilvia

i switch to 1" brake master and it still the same old shit

This suggests that the brake booster is not functioning correctly.

Check vacuum line for leak and manifold vacuum. If not, replace the booster.

RPS13-604 · 12-30-2008, 11:27 PM

i have the same problem with mine its stiff like ass i have to like almost put full force to really make the car come to a hard stop

s13envy · 12-30-2008, 11:38 PM

replace your boosters everyone!! you'll be amazed!!

Thursday · 12-31-2008, 08:37 PM

you guys should all make sure you have that little 1 way check valve going in line in the right direction....

devnull · 12-31-2008, 09:42 PM

OP: What pads/rotors are you using? Did you rebuild your calipers?

xsparc · 01-01-2009, 10:38 PM

Hmmm i have the same setup on my 89. I have only about 50% original travel, but once its there, the harder i press the tighter the calipers grab. i can lock all 4 all day long.

make sure you have the right rotors and pads for the calipers (26mm vs 30mm), check your install (bleed screw up), bleed everything.

tmsilvia · 01-02-2009, 04:49 PM

yeah i bleed all the lines, i change the booster also and it still the same.

K_style · 01-02-2009, 04:54 PM

my stock brakes on my s14 locks just fine...

yeop i would bleed lines and new booster

smelly240 · 01-02-2009, 04:56 PM

MAKE SURE THE BLEEDERS POINT UPWARD! i seen people noob that one a bunch of times.

amp2345 · 01-02-2009, 04:59 PM

If you have MT booster then this is your problem. Upgrade to Auto booster and Z master cylinder. Of course do the obvious checks but i am willing to bet this is your problem.

Mister.E · 01-02-2009, 07:15 PM

Quote:

Originally Posted by tmsilvia

yeah i bleed all the lines, i change the booster also and it still the same.

having done this are you 100% sure that your calipers arent seized?

s13envy · 01-03-2009, 01:14 AM

check the vacuum source to the booster as well. they run off of vacuum and aren't designed to see boost. so as someone said earlier, also make sure that check valve is installed.

air in the lines would not cause the pedal to be hard. there could be a seized caliper causing a hard pedal, but i'm betting on a booster problem.

12-30-2008, 04:00 PM	#1
tmsilvia Leaky Injector Join Date: Jan 2008 Location: queens, nyc Age: 40 Posts: 69 Trader Rating: (0) Feedback Score: 0 reviews	300zx brake sux ballz hi, i just install 300zx calipers all around on my 95 240sx. for some reason, the brake just wont lock up. i feel like i have no brake or pressure. i install a 17/16 300zx brake master and i have a auto booster, the padel is really really stiff and i could only brake like 50%,so i switch to 1" brake master and it still the same old shit. if anyone have any answer, please help. cuz i have no more idea

12-30-2008, 10:19 PM	#8
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	did you bench bleed the MC and could be combined with the dead booster, Also did you install the calipers with the bleeder valves pointing up? __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online #/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

12-30-2008, 10:23 PM	#9
burnsauto Premium Member Join Date: Dec 2006 Location: 717, PA Age: 35 Posts: 3,153 Trader Rating: (5) Rides Gallery: burnsauto Feedback Score: 5 reviews	and you sure you have good vacuum running to the booster? Low vacuum can cause a high, stiff pedal. __________________

01-01-2009, 10:38 PM	#16
xsparc Zilvia Junkie Join Date: Dec 2002 Location: san diego area - esco Posts: 461 Trader Rating: (0) Feedback Score: 0 reviews	Hmmm i have the same setup on my 89. I have only about 50% original travel, but once its there, the harder i press the tighter the calipers grab. i can lock all 4 all day long. make sure you have the right rotors and pads for the calipers (26mm vs 30mm), check your install (bleed screw up), bleed everything. __________________ No... no one stole my interior... its safely in my garage...

01-02-2009, 04:56 PM	#19
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 43 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	MAKE SURE THE BLEEDERS POINT UPWARD! i seen people noob that one a bunch of times. __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

12-30-2008, 04:25 PM	#5
Mister.E Post Whore! Join Date: Oct 2007 Location: Las Vegas Age: 36 Posts: 4,590 Trader Rating: (53) Feedback Score: 53 reviews	maybe due for a caliper rebuild then? maybe the pistons are seized and not pressing the pads to the rotors

12-30-2008, 10:02 PM	#7
Def Post Whore! Join Date: Apr 2004 Location: Houston, TX Posts: 2,701 Trader Rating: (16) Feedback Score: 16 reviews	Might be a dead booster. Follow the FSM troubleshooting.

12-30-2008, 10:29 PM	#10
s13envy Zilvia Junkie Join Date: May 2004 Location: Shelbyville, IN Age: 37 Posts: 407 Trader Rating: (3) Feedback Score: 3 reviews	if you have a still pedal and can't lock up the brakes then i'd check the booster. no other reason for there to be a stiff ass pedal

12-30-2008, 11:27 PM	#12
RPS13-604 Zilvia Junkie Join Date: May 2008 Location: Vancouver BC Age: 31 Posts: 386 Trader Rating: (0) Feedback Score: 0 reviews	i have the same problem with mine its stiff like ass i have to like almost put full force to really make the car come to a hard stop

12-30-2008, 11:38 PM	#13
s13envy Zilvia Junkie Join Date: May 2004 Location: Shelbyville, IN Age: 37 Posts: 407 Trader Rating: (3) Feedback Score: 3 reviews	replace your boosters everyone!! you'll be amazed!!

12-31-2008, 09:42 PM	#15
devnull Zilvia Member Join Date: Aug 2006 Location: Earth Posts: 222 Trader Rating: (0) Feedback Score: 0 reviews	OP: What pads/rotors are you using? Did you rebuild your calipers?

01-02-2009, 04:49 PM	#17
tmsilvia Leaky Injector Join Date: Jan 2008 Location: queens, nyc Age: 40 Posts: 69 Trader Rating: (0) Feedback Score: 0 reviews	yeah i bleed all the lines, i change the booster also and it still the same.

01-02-2009, 04:54 PM	#18
K_style Post Whore! Join Date: Dec 2007 Location: Henderson, NV Posts: 7,666 Trader Rating: (63) Rides Gallery: K_style Feedback Score: 63 reviews	my stock brakes on my s14 locks just fine... yeop i would bleed lines and new booster

01-02-2009, 04:59 PM	#20
amp2345 Zilvia Member Join Date: Nov 2006 Location: VA Age: 38 Posts: 205 Trader Rating: (1) Feedback Score: 1 reviews	If you have MT booster then this is your problem. Upgrade to Auto booster and Z master cylinder. Of course do the obvious checks but i am willing to bet this is your problem.

01-03-2009, 01:14 AM	#22
s13envy Zilvia Junkie Join Date: May 2004 Location: Shelbyville, IN Age: 37 Posts: 407 Trader Rating: (3) Feedback Score: 3 reviews	check the vacuum source to the booster as well. they run off of vacuum and aren't designed to see boost. so as someone said earlier, also make sure that check valve is installed. air in the lines would not cause the pedal to be hard. there could be a seized caliper causing a hard pedal, but i'm betting on a booster problem.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode