Pedal Engaging Low help!!!

Rusty · 12-31-2015, 12:08 PM

The difference in the brake pedal feel is in the calipers. You went from 2 piston (?) to 4 piston in the front. That's a lot more piston area. And you didn't change the bore size in the master cylinder.

Dragon_Ball_Z · 12-31-2015, 12:40 PM

Yea true, but they are both working the same now. I thought the master cylinders were the same?

Dragon_Ball_Z · 12-31-2015, 12:46 PM

The master cylinders in the base and sport are the same, I just confirmed that

Rusty · 12-31-2015, 02:08 PM

Hydraulic's 101. When you change one end of the system and not the other to match. Of course you will get different a pressure. The master cylinder may be the same. But what I'm getting to is the reason for the different feel. Throw in the electronic ABS. That changes the brake feeling too. Give you a question. Think about it. How many different things you can think of, that will give you a different feeling of the brake pedal?

Dragon_Ball_Z · 01-01-2016, 01:51 AM

Quote:

Originally Posted by Rusty

Hydraulic's 101. When you change one end of the system and not the other to match. Of course you will get different a pressure. The master cylinder may be the same. But what I'm getting to is the reason for the different feel. Throw in the electronic ABS. That changes the brake feeling too. Give you a question. Think about it. How many different things you can think of, that will give you a different feeling of the brake pedal?

I'm still not sure what you mean. My sport 370 came with akebonos, my other car I did a conversion on and it has the exact same setup as the sport and doesn't have the exact same pedal feel, most likely because no two cars are alike. The pedal on both cars are very very similar now though. Thanks for the help again Rusty and everyone else!

Rusty · 01-01-2016, 11:33 AM

What I was getting at. What things that can make the pedal feel different. Different pads, miles on pads, rotor material, brake lines, brake fluid, ABS, air in the system, different shoes, going from a soft tennis shoe to a stiff work boot, or anything in between.

How many things did you change, mess with when you did the change over? All of this is food for thought. Teaching you how to use your noddle.

Dragon_Ball_Z · 01-01-2016, 12:59 PM

Quote:

Originally Posted by Rusty

What I was getting at. What things that can make the pedal feel different. Different pads, miles on pads, rotor material, brake lines, brake fluid, ABS, air in the system, different shoes, going from a soft tennis shoe to a stiff work boot, or anything in between.

How many things did you change, mess with when you did the change over? All of this is food for thought. Teaching you how to use your noddle.

I didn't think about that. I put stainless steel lines on it, r1 concepts drilled and slotted rotors, stoptech pads, and flushed with Valvoline fluid. That's a lot more than a stock sport z came with so that could explain the pedal feel difference.

darkphantom · 01-05-2016, 12:22 PM

OP - did you get this resolved?

I remember on my BMW I did not have access to a tool to bleed out the ABS lines when I replaced the ABS module - so I had to "manually" do it...i.e. depressing the brake hard on a "wet" surface to engage the ABS a few times....that got the air out quick

Dragon_Ball_Z · 01-05-2016, 01:22 PM

Thanks man, and yea I got it resolved! Abs module had air in it and now it's all good

12-31-2015, 12:08 PM	#31 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,852 Drives: 2011 Nismo GM 6M Rep Power: 2684436	The difference in the brake pedal feel is in the calipers. You went from 2 piston (?) to 4 piston in the front. That's a lot more piston area. And you didn't change the bore size in the master cylinder. Spooler likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html Last edited by Rusty; 12-31-2015 at 12:12 PM.

12-31-2015, 12:40 PM	#32 (permalink)
Dragon_Ball_Z A True Z Fanatic Join Date: Jul 2014 Location: Mississippi Posts: 1,117 Drives: Nismo& Sport/Touring Rep Power: 16	Yea true, but they are both working the same now. I thought the master cylinders were the same? __________________ Build in Progress

12-31-2015, 12:46 PM	#33 (permalink)
Dragon_Ball_Z A True Z Fanatic Join Date: Jul 2014 Location: Mississippi Posts: 1,117 Drives: Nismo& Sport/Touring Rep Power: 16	The master cylinders in the base and sport are the same, I just confirmed that __________________ Build in Progress

12-31-2015, 02:08 PM	#34 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,852 Drives: 2011 Nismo GM 6M Rep Power: 2684436	Hydraulic's 101. When you change one end of the system and not the other to match. Of course you will get different a pressure. The master cylinder may be the same. But what I'm getting to is the reason for the different feel. Throw in the electronic ABS. That changes the brake feeling too. Give you a question. Think about it. How many different things you can think of, that will give you a different feeling of the brake pedal? __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

01-01-2016, 11:33 AM	#36 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,852 Drives: 2011 Nismo GM 6M Rep Power: 2684436	What I was getting at. What things that can make the pedal feel different. Different pads, miles on pads, rotor material, brake lines, brake fluid, ABS, air in the system, different shoes, going from a soft tennis shoe to a stiff work boot, or anything in between. How many things did you change, mess with when you did the change over? All of this is food for thought. Teaching you how to use your noddle. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

01-05-2016, 12:22 PM	#38 (permalink)
darkphantom Enthusiast Member Join Date: Apr 2015 Location: Houston, Texas Posts: 425 Drives: 13 Z34 PW M6 Rep Power: 243	OP - did you get this resolved? I remember on my BMW I did not have access to a tool to bleed out the ABS lines when I replaced the ABS module - so I had to "manually" do it...i.e. depressing the brake hard on a "wet" surface to engage the ABS a few times....that got the air out quick Dragon_Ball_Z likes this. __________________ '13 PW M6 \| Takeda \| ARK GRiP V2 \| H&R

01-05-2016, 01:22 PM	#39 (permalink)
Dragon_Ball_Z A True Z Fanatic Join Date: Jul 2014 Location: Mississippi Posts: 1,117 Drives: Nismo& Sport/Touring Rep Power: 16	Thanks man, and yea I got it resolved! Abs module had air in it and now it's all good darkphantom likes this. __________________ Build in Progress

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