Clutch pedal too stiff ( left leg is huge!!) upgrades

[ebayDM]

Hey guys,
Ok so I have had my 13 for 6 years, multiple clutches have been in the car and they are all stiff as crap. I make 380whp 365wtq and I need the heavy duty pressure plates to coop with the power.
I am not wanting to spend 1000+ on an OS Giken twin disk.

My clutch dampener is removed and the oem units I have now are maybe 5k miles in.

My newest clutch is pretty stiff, not as stiff as ones I've had in the past. One clutch blew 4 slaves and 3 MC in a 4 month period until I changed it.

I am wondering if there are options as far as upgrading the hydraulic system in the S13, to make the pedal less stiff and more smooth

Right now I have read that the 300zx slave is a good start.
And I'm contemplating on getting the Wilwood 3/4" MC the LS guys use.

i figure both working together would be a great set up, what do you think? Nd what are some other options ?!??

300zx TT MC ???
What lines and fittings do I need to make the Wilwood work with the stock hard line.

Please help
Thank you in advance!!!!

[mr.nismo.]

put a bigger clutch master and the damper box back on... have fun bleeding it

[jr_ss]

You could also convert to a hydraulic release bearing which would help you out tremendously.

[codyace]

Wilwood 5/8 MC is the one you want, 3/4 would make it even stiffer.

[ebayDM]

You could also convert to a hydraulic release bearing which would help you out tremendously.

Never heard of that. How hard is it ?

[ebayDM]

Wilwood 5/8 MC is the one you want, 3/4 would make it even stiffer.

Alright do you know if the factory female fitting on the Wilwood is the same thread pitch as an oem Nissan hard line. What is the fitting I need?

My plan is
-300zx slave (just picked up a. Few moments ago
-Wilwood 5/8 master (unknown fitting to fit factory hard line)
-Oem pushrod
-adaptor plate
-motul Fluid ( I put some in my stock set up yesterday and everything is a lot smoother but still to stiff to enjoy the car.

Any help on specifying the exact parts I need to complete this setup, or input for a better set up would greatly be appreciated.

Thank you guys so much !!!!

[ch1873857]

subscribing. wondering what will result from this. for my brothers car. i have an os twin plate on my RB and the pedal feels stock. so worth the money. but anyway im curious if it will work. good stuff!

[jr_ss]

Here's a link to the hydraulic release bearing.

Hydraulic Release Bearing Kit RWD - Drivetrain - Mazworx (http://www.mazworx.com/product/drivetrain/clutches/hydraulic-release-bearing-kit-rwd)

[ebayDM]

Here's a link to the hydrualic release bearing.

Hydraulic Release Bearing Kit RWD - Drivetrain - Mazworx (http://www.mazworx.com/product/drivetrain/clutches/hydraulic-release-bearing-kit-rwd)

Way to pricy for me. Thanks though.

[Pinggg]

Here's a link to the hydraulic release bearing.

Hydraulic Release Bearing Kit RWD - Drivetrain - Mazworx (http://www.mazworx.com/product/drivetrain/clutches/hydraulic-release-bearing-kit-rwd)

Shit is legit, my buddy has it on his SR.

[ebayDM]

Today I replaced my master and slave with brand new ones from advanced. ( got them for free under warranty. ).
My pedal feels much better, buttttt still a little stiff for my liking.

I've been doing a lot of searching around. Here's what I've found.

89/90 S13 slave cylinder has like a 11/16 (17.6mm) bore
Z31/Z32 NA and Turbo, and 91-98 s13-s14 have a 3/4 (19mm) bore
And nismo has a 20.54mm bore

The masters are all 5/8ths apparently

To make your pedal less stiff you need to increase the bore of the Slave.
However I'm not about to spend 200$ on a nismo.. I'll try to make one before I ever think about paying 200 for a piece that costs $1.32 to make....

Sooo. I've found on other threads where there was a guy that was custom making 7/8th OE style slaves However I haven't figured out how to get in touch with him yet.

There is also a guy that had the idea to take the guts out of an 84 celicas slave (20.62mm) and drill out your stock slave to match the bore. Bigger than Nismo for maybe 40$ or less and a few minutes of your time.
Duralast/Clutch Slave Cylinder (11833) | 1984 Toyota Celica 4 Cylinders R 2.4L FI | AutoZone.com (http://www.autozone.com/autozone/parts/Duralast-Clutch-Slave-Cylinder/1984-Toyota-Celica/_/N-ikg1mZ6o2ja?counter=0&itemIdentifier=25486_0_0_)

There is the link to the celica slave. I might try this. I am just skeptical about the drilling part it needs to be pretty perfect so it doesn't leak. I think it can be done though.



I might need to upgrade the little hard line to slave (soft line) with a SS. I had a SS on for a few years and then it took a shit on me so I switched back to tHe OEM soft line. I noticed it was flexing every time the pedal was pushed. I assume this is normal with such a high LB pressure plate.

Any thoughts!?!?

Come on :). lets figure something out

[ebayDM]

Shit is legit, my buddy has it on his SR.

I run E85 also. Built S14 SR CP 10.5-1 NA sr pistons.
I saw your little sig thing haha
It's cool to see other people are E85 with SRs

[jr_ss]

Way to pricy for me. Thanks though.

Considering all the funds you've gone through already, this could pay for itself by the time you have this figured out or have replaced the next few clutch pedals/slaves/masters... You're money so whatever.

You can't drill a slave, it has to be machined. Sounds sketchy what you're trying to do. Upgrade your factory crap hose to a SS one, less flex more pressure to the slave.

[Pinggg]

I run E85 also. Built S14 SR CP 10.5-1 NA sr pistons.
I saw your little sig thing haha
It's cool to see other people are E85 with SRs

Yeah im built with Cp 9.1 piston.

And OP just deal with the damn clutch stiffness :wackit:

[ebayDM]

Considering all the funds you've gone through already, this could pay for itself by the time you have this figured out or have replaced the next few clutch pedals/slaves/masters... You're money so whatever.

You can't drill a slave, it has to be machined. Sounds sketchy what you're trying to do. Upgrade your factory crap hose to a SS one, less flex more pressure to the slave.

I haven't spent any money actually I took back my 300zx slave and got my OEM stuff replaced for free under warrantee. And I am looking up how much it would be to have a machine shop bore out a slave. If its more than 50$ I might just get the nismo.... Lol. But I'll get a SS soft line.

My clutch isn't that bad now that I have replaced both slave and master with new parts. But I'm in tinker mode and I want to see if it's possible to soffen up heavy pressure plate single discs
I know there are a lot of people out there that suffer from different sized quads.

I'm 22, 125lbs and after driving this car daily for 3 years and at least 1-2 times a week now that I have a daily. I have a noticeably larger left quad and my knee feels crunchy and always wants to pop when I'm driving.
I recently started jogging and that has helped but. After skateboarding for 10 years and pushing in a bohemith of a clutch for 6 my left knee is pretty pissed.

All I'm saying is I'd love to make my clutch pedal a tad bit softer and make my. Car more enjoyable opposed to crying every time I get stuck at a red light.

[codyace]

From: http://zilvia.net/f/s-chassis/297254-ultimate-clutch-pedal-thread.html

My combination is:

Summit:
Wilwood MC (WIL-260-2636) 49.94
Master Cylinder to -3 Fitting (WIL-220-3406) 3.95
Slave Cylinder to -3 Fitting (-3 to M10x1.00 fitting) 11.39
40" Hose with a 90* Fitting (estimate length, FRA-322040) 23.95
89.73
S+H 10
Total: 99.73

and then:
Rigid Racing MC Adapter Bracket ([email protected]): 23 shipped

So 122.73 Total for the upgrade (110 if you find a 10% summitt coupon)

Or
95 bucks for S13 from mynismo.com (30610-70F50) (Figure 105-110 shipped total)
or
84.68 for S14 from my nismo.com (30610-70F90) (Figure 95 to 100 shipped total)

(parts store parts are JUNK, get OEM)

Now with the rigid adapter you will need to trim the lip on the firewall to let the fitting 'fit'..if you go with the thicker CNC ones (which are double if not triple the cost) you will not. To me a little dremel action never hurt anyone.


Pedal is soft as air....I originally had a 3/4 bore and it was worse than our big rigs at the shop...now it's super nice with the OE 5/8 bore MC.

I also use this in conjunction with a Nismo Slave Cylinder (and a Nismo Pivot ball). Being that the parts store Slave Cylinders and Master Cylinders Suck, I don't even consider them.


Also, I was always under the impression both the 300zx and S chassis used the 19.05 (3/4) bore Operating/Slave cylinders....