6 Pot Front - 4 Pot Rear Question
6 Pot Front - 4 Pot Rear Question
For those of you that upgraded their brakes to a 6 pot front and 4 pot rear setup or larger, did you need to upgrade the master cylinder? For those in the know, please chime in, as I'm having a problem with my setup. I've bled them several times but they are still "spongy" and do not grab as they should. What other problems can there be, besides air in the system? Thanks in advance for your help..
Join Date: Aug 2008
Location: Niagara Falls, Ontario, Canada
Age: 41
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Re: 6 Pot Front - 4 Pot Rear Question
I have always thought the SRT has spongier brakes than the NA and I think the larger pistons are the cause of this. The longer travel makes it feel spongy.
Re: 6 Pot Front - 4 Pot Rear Question
I agree with 180 about the difference between the two cars brakes. The pedal feels more firm on my NA compared to my SRT. I have had the brakes bled twice on the SRT and finally decided that's just the way it is. I don't drive it very much so it always takes a stop or two to get used to it. It will definitely stop however. Drove it really hard in some twisties this summer and never experienced any fade or low pedal.
Re: 6 Pot Front - 4 Pot Rear Question
i do have the aftermarket braided lines. They were installed before the big brake upgrade. First step will be to see if there is air in the system. As stated, I've bled the system a couple of times with no success. I'm gonna take it to a professional this time and see what they say. I'll keep you guys posted....
Re: 6 Pot Front - 4 Pot Rear Question
Thanks, will try that at the beginning of the new year. Will probably need to get new rotors as well as I've noticed mine are wavy and there's a vibration when I brake from a speed of 50+ mph.
Join Date: Jan 2017
Location: Near Capitol Raceway, Maryland
Age: 39
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Re: 6 Pot Front - 4 Pot Rear Question
Join Date: Jan 2017
Location: Near Capitol Raceway, Maryland
Age: 39
Posts: 116
Likes: 0
Received 1 Like
on
1 Post
Re: 6 Pot Front - 4 Pot Rear Question
As a guess, in a closed system, cold fluid would take less room than warm. So when it warmed, it would create extra pressure in the brake lines.
Re: 6 Pot Front - 4 Pot Rear Question
The lines are open so that the system can make up any losses of fluid, only when the master cylinder pistons move and seal the openings in the reservoir can it be called a closed system. One piston actually moves before the other in our system and many others because of a spring between them.
Re: 6 Pot Front - 4 Pot Rear Question
It is not a closed system, the lines are open at the reservoir. So any excess fluid due to expansion would return to the reservoir.
The lines are open so that the system can make up any losses of fluid, only when the master cylinder pistons move and seal the openings in the reservoir can it be called a closed system. One piston actually moves before the other in our system and many others because of a spring between them.
The lines are open so that the system can make up any losses of fluid, only when the master cylinder pistons move and seal the openings in the reservoir can it be called a closed system. One piston actually moves before the other in our system and many others because of a spring between them.