tii brakes are not stopping as i would have thought. =/ suggestions pls
#1
Daily Used and Abused
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tii brakes are not stopping as i would have thought. =/ suggestions pls
why does my tii not brake so good?? my vacum is at 15 on idle,stainless steel brake line, the car is all original tii and i have the drilled rotors, and my dads gsl-se brakes way better than my car and its bridge ported. my car stops but i really got to push that pedal hard on the floor. the brakes feel weak. oh and the pads have been replaced, the car has always felt like that since i got it. =/
#4
Rotary Freak
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The factory service manual is your friend. Download a copy free at:
http://foxed.ca/foxed/index.php?page=rx7manual
In the meantime here is the first step on how you test the booster. See page P-30 (Turbo brakes section) of the manual for more test procedures.
http://foxed.ca/foxed/index.php?page=rx7manual
In the meantime here is the first step on how you test the booster. See page P-30 (Turbo brakes section) of the manual for more test procedures.
#5
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actually now that you mention it, sometimes when i brake the steering wheel tugs me to the left. like if i were to brake and let go of the steering wheel it would turn to the left. but this happens freguently but not all the time
#6
Rotary Freak
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That could be tramlining which has to do with irregular road surface--especially at stop lights. TireRack.com has a good description. Go here:
http://www.tirerack.com/tires/tirete....jsp?techid=47
http://www.tirerack.com/tires/tirete....jsp?techid=47
#7
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That could be tramlining which has to do with irregular road surface--especially at stop lights. TireRack.com has a good description. Go here:
http://www.tirerack.com/tires/tirete....jsp?techid=47
http://www.tirerack.com/tires/tirete....jsp?techid=47
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#8
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The factory service manual is your friend. Download a copy free at:
http://foxed.ca/foxed/index.php?page=rx7manual
In the meantime here is the first step on how you test the booster. See page P-30 (Turbo brakes section) of the manual for more test procedures.
http://foxed.ca/foxed/index.php?page=rx7manual
In the meantime here is the first step on how you test the booster. See page P-30 (Turbo brakes section) of the manual for more test procedures.
#9
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Sounds like a stuck caliper. Best idea is to pull both front calipers out and try to get the pistons out of the passengers side caliper (when you're pressing the brakes only the left is grabbing). If you can't budge um, try to get some reman'd calipers from napa or some other local parts house and turn your old ones in as cores. It'll much easier than trying to get them unstuck. But if they do come out easy, get a rebuild seal kit and atleast you know that's one thing to cross of the list.
#14
Garage Life
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some times it helps if you get aflat head screw driver and push the pads against the rotors, then at the same time have a buddy pump the brake pedals while the car is idling. Then turn the car off, bleed the brakes and then the pads +pistons+ rotors should be flush against each other..
#15
Vintage sportcars
Hello,
sorry for bringing this thread back, but my car does the exact same thing.
Have a 86 S4 NA with vented discs f&r no ABS.
The overall braking performance is not as good as it should. At first I didnt noticed it, I guessed it was normal.
But after I got a spare car (peugeot 309) I think my 7 might have a slight braking issue.
Its not that it disturbs me but I am just wondering how this could be possible as the FC has been claimed as a car with good braking performance.
I was amazed how good that 309 stops, sometimes I lock the tires unintentionally.
It is not that the 7 does not stop as good as the other keg, the effort to push the brake pedal is much bigger.
I am almost certain that the booster is working, as I can push the pedal with engine off, and it gets hard to push after few attempts.
When the engine is running the pedal is soft as usual.
Edit:
My vented and slotted discs and pads are relatively new (+- 5000 km) they were done before I registered the car. (no idea what brand of pads)
Same goes for the calipers, rears are new ones and the front ones have been rebuild by a shop.
Thanks for any ideas.
Steven
sorry for bringing this thread back, but my car does the exact same thing.
Have a 86 S4 NA with vented discs f&r no ABS.
The overall braking performance is not as good as it should. At first I didnt noticed it, I guessed it was normal.
But after I got a spare car (peugeot 309) I think my 7 might have a slight braking issue.
Its not that it disturbs me but I am just wondering how this could be possible as the FC has been claimed as a car with good braking performance.
I was amazed how good that 309 stops, sometimes I lock the tires unintentionally.
It is not that the 7 does not stop as good as the other keg, the effort to push the brake pedal is much bigger.
I am almost certain that the booster is working, as I can push the pedal with engine off, and it gets hard to push after few attempts.
When the engine is running the pedal is soft as usual.
Edit:
My vented and slotted discs and pads are relatively new (+- 5000 km) they were done before I registered the car. (no idea what brand of pads)
Same goes for the calipers, rears are new ones and the front ones have been rebuild by a shop.
Thanks for any ideas.
Steven
Last edited by StevenL5975; 07-24-11 at 04:48 PM. Reason: adding info
#16
Cake or Death?
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No one has mentioned actual brake performance...is it stopping distance you don't like or how it "feels" whilst doing so?
I've had (back when the brakes were stock) a few comments about the relatively long travel and "soft" pedal on the RX and believe that it reflects on decisions made during development- basically, some test driver liked the brakes that way.
Just a personal theory.
I've had (back when the brakes were stock) a few comments about the relatively long travel and "soft" pedal on the RX and believe that it reflects on decisions made during development- basically, some test driver liked the brakes that way.
Just a personal theory.
#17
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From what I've gleaned from the way the rest of the FC has been designed, they targeted a more inexperienced driver to base their design goals on. The softer pedal feel could likely be designed in to allow drivers who don't have much real experience in feeling out the limits of braking have an easier time doing so.
#18
whats going on?
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clokker, im glad you responded to this thread as you are resident guru on this subject.
MAKE A MC BRACE!! i did this after swapping in my t2 clipers, and wasnt satisfied at all at the stopping power of the car. i could press it to the floor and it would crawl to a stop in a very pathetic way, but it did stop alright. but the brake booster in an OMFG WTF BBQ!! night and day. now i can lock these puppies up no problem.
or... just reaserch clokkers thread. his **** is legit.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/holy-grail-part-deux-852021/
MAKE A MC BRACE!! i did this after swapping in my t2 clipers, and wasnt satisfied at all at the stopping power of the car. i could press it to the floor and it would crawl to a stop in a very pathetic way, but it did stop alright. but the brake booster in an OMFG WTF BBQ!! night and day. now i can lock these puppies up no problem.
or... just reaserch clokkers thread. his **** is legit.
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/holy-grail-part-deux-852021/
#19
Vintage sportcars
Hi,
thanks for the answers so far.
I already have the 4 pot calipers.
My concern is that the required force to push the pedal down is too hard.
It stops well, and I can lock up the puppies even at 130 kmh if I wish to do so (ask me how I know )
From all the cars I drove the 7 has the most hard brake pedal feel.
I just dont know if this is intended by mazda or is caused by issues with the system.
Steven
thanks for the answers so far.
I already have the 4 pot calipers.
My concern is that the required force to push the pedal down is too hard.
It stops well, and I can lock up the puppies even at 130 kmh if I wish to do so (ask me how I know )
From all the cars I drove the 7 has the most hard brake pedal feel.
I just dont know if this is intended by mazda or is caused by issues with the system.
Steven
#20
Full Member
clokker, im glad you responded to this thread as you are resident guru on this subject.
MAKE A MC BRACE!! i did this after swapping in my t2 clipers, and wasnt satisfied at all at the stopping power of the car. i could press it to the floor and it would crawl to a stop in a very pathetic way, but it did stop alright. but the brake booster in an OMFG WTF BBQ!! night and day. now i can lock these puppies up no problem.
or... just reaserch clokkers thread. his **** is legit.
https://www.rx7club.com/showthread.php?t=852021
MAKE A MC BRACE!! i did this after swapping in my t2 clipers, and wasnt satisfied at all at the stopping power of the car. i could press it to the floor and it would crawl to a stop in a very pathetic way, but it did stop alright. but the brake booster in an OMFG WTF BBQ!! night and day. now i can lock these puppies up no problem.
or... just reaserch clokkers thread. his **** is legit.
https://www.rx7club.com/showthread.php?t=852021
#21
Vintage sportcars
Noticed yesterday, driving my damaged 7(https://www.rx7club.com/2nd-generation-non-technical-pictures-198/suv-bumps-into-my-clean-fc-side-damage-963959/) to the shop that it doesnt stop on a driveway when pulling the handbrake to max. It slowly rolls down. lol
Had to put it in gear to stop rolling.
Is this an adjustment matter or why does the handbrake have almost 0 effect ?
Steven
Had to put it in gear to stop rolling.
Is this an adjustment matter or why does the handbrake have almost 0 effect ?
Steven
#22
Adjust the brake booster pushrod. Unbolt the master cylinder but do not release the Lines. behind there you will see the pushrod. On the end is a 7mm nut. Hold the pushrod with some pliers/vicegrips (be careful not to damage it) and use a deep 7mm socket to lengthen the pushrod. Only a few small turns are necessary. If you lengthen it too far, the brakes will drag.
It's been a while since I've done this so I am going from memory...
here is a post a made about it a long long time ago https://www.rx7club.com/2nd-generation-specific-1986-1992-17/poor-braking-descriptive-397058/
It's been a while since I've done this so I am going from memory...
here is a post a made about it a long long time ago https://www.rx7club.com/2nd-generation-specific-1986-1992-17/poor-braking-descriptive-397058/
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From what I've gleaned from the way the rest of the FC has been designed, they targeted a more inexperienced driver to base their design goals on. The softer pedal feel could likely be designed in to allow drivers who don't have much real experience in feeling out the limits of braking have an easier time doing so.
it does seem like the ideal brake pedal in 2011, is firmer, and moves less, but still linear.
it also seems like the average car has brakes that are like an on off switch because maybe it feels safer?