Forget the Spring: The Real Solution To Clutch Pedal

modme

Hey Guys,

So a lot of us 6mt guys have been complaining about the OEM clutch pedal feel. The engagement level is too high, the engagement window is too short, and the pedal is somewhat stiff. It makes the car very difficult to drive smooth, even after years of experience.

If you have a stiff aftermarket clutch let me (OS Giken), you can forget about it. The clutch is an on off switch. In my research for a solution, I finally came across a company/individual that has redesigned the clutch pedal for the G35 and 350z.

"The main feature of the clutch pedal kits is the AFP Slider. It directly adjusts the fulcrum point of the pedal arm, changing the amount of leverage it has over the master cylinder.
As you know if you grab a longer handled ratchet like a torque wrench you can apply a huge force at the bolt with very little force at the end of the handle.

Same principle applies here. Shorten the fulcrum and it increases the leverage the pedal has to push the MasterCylinder which in turn actuates the clutch diaphragm.
This same principle makes the window of engagement wider by reducing the total travel of the master cylinder while maintaining the same travel of the pedal. This makes the clutch pedal feel less sensitive or touchy and makes the car much easier to drive smoothly."

The reviews for G35 and 350z have been extremely positive. This modification increases the engagement window, lowers the engagement point, and can decrease the pedal pressure. But everything is adjustable.

You can find reviews here:

Review of RJM adjustable clutch pedal bracket - MY350Z.COM Forums
New G & Z Clutch Mod - Long Read - Page 4 - MY350Z.COM Forums
Review of RJM Performance adjustable clutch pedal bracket - G35Driver
RJM Performance adjustable clutch pedal bracket review - G35Driver

This is what the G35 kit looks like:



Here is the link to the product:

Products - *RJM Performance.com


The kit is not released for G37/370z yet, but if you're interested to be one of the first group of "testers" to get this kit, there will be a slight discount. Send an email to Ryan@RJMPerformance.com, and he will add you to the list.

I have no affiliation with the company, I just wanted to pass the good news along. I've been sick and tired of the poor drivability of my clutch and finally found the solution.

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GTM Twin Turbo Stage 2|GTR Turbo/Engine Gauges|KW V3 Coilovers|HKS Exhaust|Oil Cooler| Vossen CV1

MattP725

Interesting... sub'd

Mandingo

Good find. sub'd

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some mods

oreoleo

This is definitely interesting! I'm open to try it out. sent the guy an email.

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'09 6mtS OB Coupe|KW V3|SPC|Stillen 3G|Invidia Gemini CB+HFC|Nismo S/S|Hotchkis

1slow370

be very careful changing the factory piston travel i would make pedal stops and appropriate install a must u don't want to pop the csc out past its travel.

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modme

To address your concern:

"The Mod brackets reduce the total slave cylinder movement for any given pedal travel to increase the engagement window. The lowest AFP setting is 100% the same as stock so there is 100% no chance of ever over extending the CSC and popping the seals."

In other words, with the clutch pedal kit, it'll only push the CSC as far as the OEM pedal did. It will only decrease the amount of CSC travel, it will NOT increase it.

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GTM Twin Turbo Stage 2|GTR Turbo/Engine Gauges|KW V3 Coilovers|HKS Exhaust|Oil Cooler| Vossen CV1

phunk

^ with my osg and zspd csc, I need about 10% of the original piston travel. Literally. Clutch is fully disengaged the moment you even feel pressure on the pedal.

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modme

I hear ya, that's why I can't wait until the pedal mod comes out. I also have the OS giken clutch.

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GTM Twin Turbo Stage 2|GTR Turbo/Engine Gauges|KW V3 Coilovers|HKS Exhaust|Oil Cooler| Vossen CV1

Ron

sub'd.. fantastic info modme, thank you!

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2011 Twin Turbo PW nismo #113 - My Journal - My TT Build Thread
[ GTM GTX Stg2 TT || HKS EVC6 || Custom CarPC || F.I 3'' TDX CBE || SB 6puck clutch/ZSpeed CSC || BC BR Coilovers || SPC camber arms || Work VSS-X || Custom Headlights || PW:JDM CF Covers || Seibon CF Engine Cover ]

Teddy KGB

+1 Thanks, modme!

djrelic

I just ordered mine yesterday.
It is on it's way from Canada.

I'll post a review once I have it installed.

MyZ4U2C

Sub'd

RoshDawg

Wait this is available for the 370z? Please post impressions!!

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| EVO X MR | '11 WRX STI | 370Z SPRT | 911 (991) C2S |

Shotta

Wait, this is available from Canada, thats a first!

Once I see some reviews on the driveability in the 370 then I will jump on this.

This mod, with a short shift kit and performance transmission mounts would be a great combo.

EDIT: I just placed my order.

modme

I posted a review after receiving and installing my pedal. Here is the link:

Review: RJM AFP Clutch Pedal System

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GTM Twin Turbo Stage 2|GTR Turbo/Engine Gauges|KW V3 Coilovers|HKS Exhaust|Oil Cooler| Vossen CV1