brakes...wtf??

[3CL1PS3]

so all day today my brakes worked fine. the stopped like normal and everything but then i went to go to the store and when i go to stop, they take a minute to actually begin stopping. its like i push the pedal and and has to be all the way down before it engages. also when i let off of the pedal i hear a little weird noise come from it. anyone know whats going on?

[OrangeDemon]

Busted a brake line? and it sucking in air when u let off

[evangeliise]

^ yeah, had the same problem, air got into the brake line. But it went away a couple days later.

[hackerd]

Brakes work by compressing brake fluid because liquid is not compressable so it will move an object. If there is any air in the line whatsoever the brake will have to be pressed further and further until it gets past that air to a liquid. Check you lines for a leak. If you have a buddy and a lift or jack stands, press the breaks and have him/her check each line for break fluid leaking out.

[Steveo]

Shitty dude

[3CL1PS3]

alright thanks guys. my springs should be here today so ill check all the the lines out when i put those on hopefully tonight.

[hackerd]

also, do an idiot check and make sure the brake fluid cap is on tight.

[dejectedangle]

Check for fluid leaks even around the boots on the calipers don't wash the car look for a wet spot ))))) what she said

[Steveo]

Springs! What did get dude.. Haha no more 4x4

[3CL1PS3]

haha yeah i traded my ps3 for an eibach pro kit. i cant wait. except tracking number said they were supposed to be here 9-28-11 and today is the 30th and they still didnt show so i called and usps said sometimes you have to allow up to 2 weeks after the date the tracking number says...they are in florida right now and the lady said it could still take 14 days to get from jacksonville to venice. **FAIL**

[muscles]

Aww jason that sucks. But you'll probably get them perrty soon. And great choice on springs, low enough and you don't have to worry to much on. Scraping.

[snakeeyes]

dont put too much faith in the usps .their on the brink of going bankrupt.i remember a few times when i was trying to track stuff and sometimes i couldnt because of the failing system.even after i recieved my items,it still didnt show as delivered.overall right now,they are a pretty good service but tracking #'s are pot luck lol.

[3CL1PS3]

well go figure i get i on here and raise hell about them and then a couple hours later they show up haha but oh well i got them yesterday but had to go to work so after work me and one of my friends stayed up late and put them on. ill post pics in show section.

[lite2]

I had a similar issue, I posted mine as "Brakes all but fail" in the suspension thread.
I'm still a bit nervous now.

[3CL1PS3]

yeah they are still screwing up but now i at least know that i have a little less stopping distance rather than it just surprising me. i ordered stainless steel lines so they should be here in a few days and then hopefully the problem will be fixed after i bleed the lines and put new ones on

[muscles]

yea stainless steel lines are the shit. definitely an awesome upgrade but then again recommend you get the rotors and pads while you are at it.

[3CL1PS3]

muscles--yeah thats next on the list to order after i get paid this week. what rotors did you go with?

[muscles]

Originally Posted by 3CL1PS3

muscles--yeah thats next on the list to order after i get paid this week. what rotors did you go with?

I went with RRE full brake kit they have on there site. Centric slotted, with there pads. I can definitely stop on a dime. ui

[3CL1PS3]

ok glad to hear it cause thats what i wanted to order. lol i figured they were good cause its rre but never know till you ask sometimes.

[muscles]

Originally Posted by 3CL1PS3

ok glad to hear it cause thats what i wanted to order. lol i figured they were good cause its rre but never know till you ask sometimes.

Ha yea man you'll love em

[lite2]

Hate to sound stupid but what is the benefit of stainless steel lines?
Seems to me that as long as there's no air and not leaking a tube is a tube.
What correlation would that have to brakes fading, pedal dropping?

[hackerd]

What are OEM hoses made from?

Typically, OEM hoses contain a compliant polymeric inner hose to transmit brake fluid pressure from the brake tubes to the caliper. While the polymeric tube itself does a good job of withstanding attack from the brake fluid, it must be protected from the outside world and is consequently wrapped (overmolded) with a thick, rubber coating. Hollow fasteners at one or both ends of the hose provide a direct flow path and a leak-free connection system.

So how are Stainless Steel lines different?

Stainless Steel lines (they are actually hoses, but we'll use the common term “lines” from this point forward in this FAQ) are similar to OEM hoses in function, but differ greatly in execution. Unlike OEM hoses, SS lines incorporate a low-compliance Teflon inner hose. In addition, instead of covering the Teflon with overmolded rubber a woven braid of Stainless Steel strands is placed over the hose for protection. As with an OEM hose, the ends are terminated with hollow fasteners to allow for the leak-free passage of brake fluid.

So why is that better than the OEM rubber design?

Stainless Steel lines provide a number of benefits as compared to their OEM rubber overmolded counterparts.

1. The SS braid provides superior protection from flying roadway debris.
2. The SS braid and Teflon hose reduce expansion during pressurization.
3. They provide the race car look.

I understand the protection benefit, but can you explain the reduced expansion benefit?

Any time that an object is subjected to internal pressure, it expands. The amount of expansion will be proportional to the amount of pressure present and the rigidity of the holding structure. In the case of brake hoses, we are subjecting Teflon to internal pressures as high as 3000PSI. Because the Teflon is relatively flexible (which makes it ideal for the job in one regard), it will expand under these conditions. This expansion creates additional fluid volume in the hydraulic circuit which is felt by the driver as a soft or mushy pedal.

Rubber overmolding does little to reduce expansion under pressure, as rubber is also a relatively flexible material. A woven braid of Stainless Steel, however, can greatly increase the rigidity of the hose under pressure while still allowing adequate flexibility for wheel end movement. In many cases, this reduced expansion can be felt by the driver as a firmer or more responsive brake pedal.

In addition, the reduced compliance will result in a faster transient response of the brake system. In other words, the time from the driver hitting the brake pedal until deceleration is generated will be decreased by a small amount. The benefit will vary based on each individual application, but in general overall deceleration can be attained more quickly, resulting in slightly shorter stopping distances.

What impacts will SS lines have on my vehicle's P-T (pressure vs. torque) relationship?

None. Because brake lines and hoses do not affect the torque generated at the wheel end, the P-T relationship remains unchanged when SS lines are installed. Only changes to a vehicle's caliper, rotor, or brake pad coefficient of friction will impact the P-T relationship.

Well then, will SS lines impact my vehicle's P-V (pressure vs. volume) relationship?

Absolutely. Because SS lines are much less compliant than their OEM counterparts, the P-V relationship will be reduced to some degree (less volume will be required at a given pressure). This is exactly the reason that a car equipped with SS lines has a firmer brake pedal.

However, because the P-T relationship remains unchanged with SS lines, the impact to ABS, TCS, and other brake control systems is typically negligible. Our own BBK kit testing indicates that most ABS, TCS, and other brake control systems are robust to the small changes affected by the addition of SS lines. On the other hand, testing at StopTech (and at major OEMs as well) has shown that while decreases in the P-V relationship typically are invisible to SS lines, increases in the P-V relationship are not (as would be found with an inappropriately-sized BBK).

In summary, because SS lines and a properly sized and balanced BBK only serve to reduce the P-V relationship, we have time and time again demonstrated appropriate system integration with these products. Our in-house testing allows us to make this statement for every platform we service.

Will I feel a difference on my car if I install SS lines?

The amount of perceived difference will vary by each car's individual design, age, and usage. Those cars with a significant amount of flexible OEM line or those that have seen years or use and aging will typically display a more dramatic improvement in pedal feel than new cars with shorter lines.


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[lite2]

Thanx Hackerd. So these purely refer to the flex lines, gotcha
I still don't see them helping the issue I had unless a line just swelled for a couple blocks then went back to normal since (ya right )
They do sound like a fine idea, but unless I DO have a compromised line all I can think is that an air bubble got in the wrong part of the system or the ABS system had a brain fart.

[hackerd]

No problem. There really is no right place for an air bubble to be in your system. It will help with a mushy pedal.

[CrAnSwIcK]

if there's air or water in the system you should be able to continuously pump the brake and get good pressure, if you can never build pressure or pressure is only felt at a certain point in pedal throw, you could have a leak, or there could be several other problems.