I need better brakes!

Jon3sgte · 05-08-2009, 01:44 PM

i just did the brakes on all 4 corners and my pedal still feels mushy. nowhere near like i think it should. I bled them twice and even took it to Big O to have them bleed them but the same result. Is this normal for the NA? this is my 3rd NA and I dont remember having this problem before. The pedal wont go to the floor but to me feels like it goes too far. Will braided lines help this? Switching to DOT 4 fluid? Rebuild kit for the rotors? turbo master cylinder? I am running slotted rotors. The car stops but not like it should.

muffinman · 05-08-2009, 03:22 PM

maybe the master is bad. check the vacuum line on the booster.

Jon3sgte · 05-08-2009, 05:01 PM

how do i do that? will a turbo master work with the NA? is it the same?

TomsMR2 · 05-08-2009, 05:12 PM

stop trying to hunt for reasons to waste your money

something in your braking system is broken. you gotta find what broke, and replace it. bone stock 91 brakes are strong enough to win nationals in autox.

Jon3sgte · 05-09-2009, 12:45 AM

Quote:

stop trying to hunt for reasons to waste your money

thats why i posted on here. i might just take it to brake masters and see what they can find. I went through the system last weekend and couldnt find anything wrong

como · 05-09-2009, 05:45 PM

Did you bleed it properly? Only things I know if that will cause mushy brakes is air in the lines, leaking fluids, or a bad valve in the cylinder...

Jon3sgte · 05-09-2009, 08:53 PM

yeah, i bled them twice and then took it to a shop and had them do it as well. same result. Maybe one or more of my calipers is sticking. i might have to rebuild them. thats the only thing i can think of.

328FTW · 05-10-2009, 01:56 AM

I had squishy brake in my race car and it was a bad brake master (not the whole booster just the master). I replaced it because I had another new one for it anyway. I don't know how to check for a bad master without replacing it, because if it's not a bad master you've wasted your money. Check the free things first before replacing stuff.

Btw is it using any fluid?

Jon3sgte · 05-10-2009, 11:27 PM

thanks for the info. no, the level has stayed the same.

KaDuWin · 05-11-2009, 08:31 PM

Quote:

Originally Posted by Jon3sgte

thanks for the info. no, the level has stayed the same.

I had a similar problem with my car lately it turned out that my master cylinder started to sweat a little (almost not noticeable upon visual inspection), and my front brake hoses were dry rotted, I replaced both of those along with the front pads and it stiffened up the pedal nicely.

Right now I need to replace the front rotors I want to get some slotted but I am not sure what I want to go with, I have had power slot rotors on my car for the past 6 years/30,000 miles and they have just now begun to warp. I am looking to spend below 180 for a pair. Does anyone one have any recommendations? How are EBC rotors?

TreyMR2 · 05-11-2009, 08:33 PM

Mine used to be like that then I bought a really nice clean low mile master cylinder from a 94 turbo and HUGE difference. I agree with tom, you don't need anything past the stock brakes as long as they're in good working condition.

Jon3sgte · 05-11-2009, 11:14 PM

It could just be me. i'll try to pick up a turbo master and see what happens. thanks for the replies.

lestat13 · 05-12-2009, 10:26 AM

Quote:

Originally Posted by TomsMR2

bone stock 91 brakes are strong enough to win nationals in autox.

Not to completey throw everyone on subject here.... (btw, same problem in my Integra, had air in my lines, my friend at the bleeder valve was doing it wrong)

Planning a motor swap at the end of the summer but was going to replace brakes soon. Most people I have talked to said upgrade to turbo brakes. You think they will suffice?

328FTW · 05-12-2009, 06:30 PM

The only difference between the n/a brakes and the turbo brakes with street tyres is that the turbo brakes will stop you more times without fading where the n/a brakes can't dissipate the heat as fast. They both will up to that point both stop you equally fast on normal tyres. The mr2 has pretty good stock brakes. Depends on how many high speed slowdowns you intend to do in a row.

lestat13 · 05-12-2009, 10:48 PM

When I was on the mazda boards, you could swap supercharged millenia s brakes into mx6 and ford probes by essentially just buying the s pads and rotors. How different are the pads and rotors of the n/a and turbo MR2? Could I run turbo pads and rotors in my n/a or would I need tons of stuff (calipers, master cylinder, hubs, etc)?

TreyMR2 · 05-12-2009, 10:58 PM

IIRC the turbo rear brakes are bigger and the front are the same as an N/A.

Medusa · 05-13-2009, 11:19 AM

I have always heard that the most upgrading you will need to do to your braking system is swapping turbo rotors/calipers and SS braided lines. And, of course, running good metallic brake pads. Anything besides that and you are throwing money away.

lestat13 · 05-13-2009, 11:31 AM

Quote:

Originally Posted by Medusa

I have always heard that the most upgrading you will need to do to your braking system is swapping turbo rotors/calipers and SS braided lines. And, of course, running good metallic brake pads. Anything besides that and you are throwing money away.

Exactly what I was expecting and hoping to hear

Medusa · 05-13-2009, 01:41 PM

I'm only once source though, and while I would consider myself fairly knowledgeable about MR2's I am nowhere close so some of our guru's here on the board.

I don't know if you need any other parts for a turbo brake swap though, I would search it. But definitely upgrade to SS braided lines, and good quality pads. But make sure your pads are matched to your application.

Redstar · 05-15-2009, 10:36 AM

MkII big brake conversion parts

Parts list and costs. The brake booster is slightly larger, but isn't really needed.

There should be a few threads comparing the NA and Turbo brakes on here too.

05-08-2009, 01:44 PM	#1 (permalink)
Jon3sgte Cage Fighter Join Date: Nov 2007 Location: Tucson, AZ Posts: 186 Thanks: 8 Thanked 1 Time in 1 Post iTrader Rating: (1/100% )	I need better brakes! i just did the brakes on all 4 corners and my pedal still feels mushy. nowhere near like i think it should. I bled them twice and even took it to Big O to have them bleed them but the same result. Is this normal for the NA? this is my 3rd NA and I dont remember having this problem before. The pedal wont go to the floor but to me feels like it goes too far. Will braided lines help this? Switching to DOT 4 fluid? Rebuild kit for the rotors? turbo master cylinder? I am running slotted rotors. The car stops but not like it should.

05-08-2009, 05:12 PM	#4 (permalink)
TomsMR2 Still not heraldo. Join Date: Feb 2005 Location: Pineapple under the sea Posts: 4,911 Thanks: 18 Thanked 406 Times in 303 Posts Blog Entries: 1 iTrader Rating: (4/100% )	stop trying to hunt for reasons to waste your money something in your braking system is broken. you gotta find what broke, and replace it. bone stock 91 brakes are strong enough to win nationals in autox. __________________ Science fact: If you took all the veins from your body and laid them end to end, you would die.

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05-08-2009, 03:22 PM	#2 (permalink)
muffinman U-P-G-R-A-Y-E-D-D Join Date: Jan 2008 Location: Sunny South Florida Posts: 5,881 Thanks: 53 Thanked 283 Times in 272 Posts Blog Entries: 1 My Google Map iTrader Rating: (2/100% )	maybe the master is bad. check the vacuum line on the booster.

05-08-2009, 05:01 PM	#3 (permalink)
Jon3sgte Cage Fighter Join Date: Nov 2007 Location: Tucson, AZ Posts: 186 Thanks: 8 Thanked 1 Time in 1 Post iTrader Rating: (1/100% )	how do i do that? will a turbo master work with the NA? is it the same?

05-09-2009, 05:45 PM	#6 (permalink)
como Road Warrior Join Date: Jan 2009 Location: Southern Maine Posts: 652 Thanks: 13 Thanked 10 Times in 9 Posts iTrader Rating: (2/100% )	Did you bleed it properly? Only things I know if that will cause mushy brakes is air in the lines, leaking fluids, or a bad valve in the cylinder...

05-09-2009, 08:53 PM	#7 (permalink)
Jon3sgte Cage Fighter Join Date: Nov 2007 Location: Tucson, AZ Posts: 186 Thanks: 8 Thanked 1 Time in 1 Post iTrader Rating: (1/100% )	yeah, i bled them twice and then took it to a shop and had them do it as well. same result. Maybe one or more of my calipers is sticking. i might have to rebuild them. thats the only thing i can think of.

05-10-2009, 01:56 AM	#8 (permalink)
328FTW Crazy Nasty Honey Badger Join Date: Aug 2008 Location: New Zealand Posts: 5,235 Thanks: 24 Thanked 266 Times in 239 Posts My Google Map iTrader Rating: (1/100% )	I had squishy brake in my race car and it was a bad brake master (not the whole booster just the master). I replaced it because I had another new one for it anyway. I don't know how to check for a bad master without replacing it, because if it's not a bad master you've wasted your money. Check the free things first before replacing stuff. Btw is it using any fluid?

05-10-2009, 11:27 PM	#9 (permalink)
Jon3sgte Cage Fighter Join Date: Nov 2007 Location: Tucson, AZ Posts: 186 Thanks: 8 Thanked 1 Time in 1 Post iTrader Rating: (1/100% )	thanks for the info. no, the level has stayed the same.

05-11-2009, 08:33 PM	#11 (permalink)
TreyMR2 Gen3 swap DONE!! Join Date: Jun 2007 Posts: 2,472 Thanks: 30 Thanked 60 Times in 58 Posts iTrader Rating: (10/100% )	Mine used to be like that then I bought a really nice clean low mile master cylinder from a 94 turbo and HUGE difference. I agree with tom, you don't need anything past the stock brakes as long as they're in good working condition.

05-11-2009, 11:14 PM	#12 (permalink)
Jon3sgte Cage Fighter Join Date: Nov 2007 Location: Tucson, AZ Posts: 186 Thanks: 8 Thanked 1 Time in 1 Post iTrader Rating: (1/100% )	It could just be me. i'll try to pick up a turbo master and see what happens. thanks for the replies.

05-12-2009, 06:30 PM	#14 (permalink)
328FTW Crazy Nasty Honey Badger Join Date: Aug 2008 Location: New Zealand Posts: 5,235 Thanks: 24 Thanked 266 Times in 239 Posts My Google Map iTrader Rating: (1/100% )	The only difference between the n/a brakes and the turbo brakes with street tyres is that the turbo brakes will stop you more times without fading where the n/a brakes can't dissipate the heat as fast. They both will up to that point both stop you equally fast on normal tyres. The mr2 has pretty good stock brakes. Depends on how many high speed slowdowns you intend to do in a row.

05-12-2009, 10:48 PM	#15 (permalink)
lestat13 No Skills Join Date: May 2009 Posts: 49 Thanks: 5 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	When I was on the mazda boards, you could swap supercharged millenia s brakes into mx6 and ford probes by essentially just buying the s pads and rotors. How different are the pads and rotors of the n/a and turbo MR2? Could I run turbo pads and rotors in my n/a or would I need tons of stuff (calipers, master cylinder, hubs, etc)?

05-12-2009, 10:58 PM	#16 (permalink)
TreyMR2 Gen3 swap DONE!! Join Date: Jun 2007 Posts: 2,472 Thanks: 30 Thanked 60 Times in 58 Posts iTrader Rating: (10/100% )	IIRC the turbo rear brakes are bigger and the front are the same as an N/A.

05-13-2009, 11:19 AM	#17 (permalink)
Medusa HAY GUISE! Join Date: Sep 2008 Location: Reno, NV Posts: 752 Thanks: 9 Thanked 18 Times in 17 Posts iTrader Rating: (0/0% )	I have always heard that the most upgrading you will need to do to your braking system is swapping turbo rotors/calipers and SS braided lines. And, of course, running good metallic brake pads. Anything besides that and you are throwing money away.

05-13-2009, 01:41 PM	#19 (permalink)
Medusa HAY GUISE! Join Date: Sep 2008 Location: Reno, NV Posts: 752 Thanks: 9 Thanked 18 Times in 17 Posts iTrader Rating: (0/0% )	I'm only once source though, and while I would consider myself fairly knowledgeable about MR2's I am nowhere close so some of our guru's here on the board. I don't know if you need any other parts for a turbo brake swap though, I would search it. But definitely upgrade to SS braided lines, and good quality pads. But make sure your pads are matched to your application.

05-15-2009, 10:36 AM	#20 (permalink)
Redstar My other cars are jealous Join Date: Feb 2007 Location: Bellingham, WA Posts: 439 Thanks: 21 Thanked 40 Times in 29 Posts iTrader Rating: (12/100% )	MkII big brake conversion parts Parts list and costs. The brake booster is slightly larger, but isn't really needed. There should be a few threads comparing the NA and Turbo brakes on here too.