Wilwood Heavy-Duty Clutch Master Cylinder
 

I found this the other day on zspeed.com

Zspeed Performance Wilwood master cylinder upgrade

This looks just like our OEM one. Does anyone have this or can chime in?

http://www.zspeedperformance.com/ima...807853241.jpeg

Just wondering...

I bought one of those 2 weeks ago , I havent had time yet to install it .
Im waiting on the RJM pedal assembly to go any further since im swaping in the 6MT instead of the 7AT

The hell... how hard was that switching your 370z from auto to 6mt?

What? An aftermarket master for our cars now? Joe had one available for the 350 for awhile.

You guys might want to check again. For VHR an abs module gets in the way, unless there is a solution to get around it.

I wasnt aware of the possible problem with the ABS module since I havent heard of anyone going with an aftermarket master cylinder.

anyway Im ditching the ABS out, so that wont be a big issue !

well since I still had a spare HR engine/tranny + ECU from my 350z old days.
the switch from 7AT to a 6MT isnt too bad
I could have went on the cheap side with used OEM stuff (clutch pedal assy. master cylinder and hose...) but I didnt.

we just did one on an 08 hr car with a giken twin disc, the pedal pressure was defnitely a lot better.

Good to hear. I'm hoping for something that fits the VHR platform so I can get one once the OEM one fails again. It gets mushy after a few months, and doesn't feel quite linear.

It will not fit the 370Z, Only fits the 350Z. The ABS module is the problem and gets in the way.

We are working on a full custom master for the 370Z/G37. It will be a complete custom made piece.

That will be sick. Okay atleast now I know.

... and knowing is half the battle!

G.I. JOE!

Any news on this? My clutch master just went wonky and I reaaaallly don't want to put the $ into the stock piece of trash...

just wondering, why didnt you just buy a 6mt in the first place?

Why?

im not gonna debate a 7AT Vs 6MT
but I will share my experience with you since you asked

When I had 6MT 350z in the pass and was tracking it as well. It was good and everything then when the time came for the 370z. The 7AT proved to be a much more advance auto tranny than their previous one on the 350z which suck.

7AT with its paddle shifter was quite attractive and very fast shifting.
I was 50/50 between the 2 of them. Im not into drifting so the use o the clutch isn't that needed.

So after going on the track and being quite aggressive I discovered some flaws on the 7AT that made me switch back to the 6MT mosty because I blew the VVEL head and I didn't want to put another VVEL engine in there and I went with the HR head swap
Budget was another big reason since the warranty didn't cover my engine.


The 7AT needs the 370z ECU to function and since it wasn't there anymore I couldn't use it and then find some fix to correct the flaws Ive seen on the track.

Nothing yet, We have not had time to work on it.....

I'm curious if anyone knows the long term effect of changing to an A/M clutch CSC and leaving the stock MC in place, is there a one to one relationship between the MC and the CSC? In other words, can the A/M CSC cause the MC to work harder etc pushing a different load -for lack of a better word- than the stock CSC?
I haven't seen any complaints but I have read that a lot of guys have a CSC that fails, they replace with an A/M CSC, then later have to replace the MC. Is it just a coincidence?

We always recommend a new master cylinder with a new slave, Its like replacing your oil and not the filter.

Master CYL is just as worn as the slave, The same amount of crap/dirt and grime is in the master as is in the slave cylinder.

It's a matter of once you open the system, if the master is weak, it will not work correctly.

Our slave puts no more load on the master (actually a tiny bit less load/pressure) than the stock slave does, The clutch itself is what's going to increase the load on both parts.

The master cylinder is a $100 part, Why would anyone spend $1500+ on a clutch, Slave, Flywheel and not replace the cheapest part in the system?

Makes sense, thanks!

.......and why not? ;)

Because it is in a different location and adds a lot of extra labor charges if you aren't doing it yourself...? Paying for labor to use a crap part again is a hard pill to swallow.

The limited knowledge I have of the CSC is that when it fails, it leaks all the fluid into the bell housing contaminating the clutch disk? My pedal began sticking halfway when releasing it so I checked the fluid level and it was empty. Filled it with more fluid and it works for now again, and the leak seems slowish? Has to be failed CSC though with fluid loss and its not leaking around the master. Should I be assuming I will have to replace the clutch when I replace the CSC?

My G35 6mt was just as bad with all the stupid little things that were poorly designed and failed. I should have known better than to trust that the new Z would be better. Effing Nissan.

I agree. Mine went out at 12k and everything was replaced. SC, CMC, lines, etc. Dealer covered but they used your exact analogy.

Any new updates? My stock master just died after getting the southbend clutch/flywheel after less than 10k miles in only 6 months. The new dealer I am going to (fontana nissan) recommended the willwood HD one but of course that is for 350z. They said they thought they just did one on a 370z the other day but sure enough it was just a 350z and not a 370z.

I really dont want another master dieing in 6 months. Do you think the replacement will be available in another 6 months?

This sounds exactly like what happened to us, and oh how I wish someone had directed me here or told me to order a new Master Cylinder when I bought everything else. 4 of us, including several pro gearheads spent virtually the entire weekend yesterday trying to figure out what the frack the issue was, bleeding every technique we could think to try and getting limited resistance.

It would build some resistance, usually about halfway...very occasionally it would get very, very close to full resistance but then would inevitably lose it again...or we'd start the car, and it would go into gear once or twice then not again.

The first time we learned that the hard way thinking we were done and taking it on a test drive around the neighborhood only to become stranded...but we figured out if we gravity bled with the clutch fully extended we could "fake it" and get it into gear, enough to drive back home anyway.

Finally figured it had to be the Master, because we did replace with the heavy duty slave cylinder...came around looking here and elsewhere and everything I've read seems to point to the Master.

So I'm very much hoping that's the case, as we have one coming in tomorrow and I need the car driveable by Wednesday.

Plus, ZDayZ is coming up...and I can't be out of the Z for that :shakes head:

So everyone still going with OEM or is there finally an aftermarket solution?

Or is This still the way to go?

I am on my third OEM one and likely soon to be on the 4th :(

I just replaced my clutch/flywheel, I also did the CSC from Z concept and my master went out also. The transmission has 31k.

hey joe, my pedal dropped this past weekend and my 3 year 36k mile warranty literally expired 16 hours before I brought the vehicle in so I'm trying to fight that and get it under warranty, but if they don't give me a break have y'all come out with an aftermarket slave cylinder and master cylinder for a 2011 370?

With all these blown MC's, I'm wondering if it has something to do with having an internal csc? If you think about it, everytime you push the clutch pedal, the csc is picking up all the clutch dust sitting on the shaft. That dust gets suspended in the fluid and is very abrasive. That would probably make any seal go bad in no time.

I recently put on the z1 CSCEK on my car with a new master. Let's see if it makes a difference with the slave on the outside of the bell housing.