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:

http://my350z.com/forum/engine-and-d...l-bracket.html
http://my350z.com/forum/engine-and-d...ng-read-4.html
http://g35driver.com/forums/interior...l-bracket.html
http://g35driver.com/forums/drivetra...et-review.html

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 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.

 

Nice subject title Interesting solution.

I've only had my car for a few days, so still getting used to it. I don't have much issue with the short friction zone or uptake at near the top of the pedal release. My old car was similar (took me a long time to get used to that), and now actually have to retrain the left leg muscle memory as I think the G starts to grab somewhat sooner than my camaro (stock clutch z28) did.

As for pedal effort, my only issue so far is clutch feel (or lack there of) which was remedied by removal of the helper spring (soon to be replaced by a much weaker one). Even with this helper spring out, the clutch feels nowhere near as stiff as what I'm used to. I think for those who come from other cars with much lighter clutch pedals, the G's might feel stiff. I had an opportunity at one time to test drive a semi tractor around a parking lot--- Now that was one stiff clutch pedal!!

 

If you want a stiffer pedal feel, I'd recommend the OS Giken clutch. You'll get a 100% increase in pedal feel. lol. I didnt mind the OEM clutch that much. But once you go with an aftermarket clutch with more clamp load, the driveability and pedal feel is affected. I think this clutch kit will help adjust that.

 

I have the Southbend stage III and I'm willing to give this a try to get a longer, smoother engagement range. I've gotten used to the stiff pedal and the engagement point seems a bit lower than OEM but it's still difficult to engage smoothly without riding it too much unless I focus on every shift.

I'm in to test it out.

 

In case there is any concern about overstretching the CSC with increased pedal travel:

"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.

 

That's great news too. I replaced the CSC with an OEM one along with the Zspeed sleeve when I replaced the clutch and flywheel. I had to replace it again only a few thousand miles later so I opted to used the Zspeed heavy duty CSC.

 

I'm interested.

 

I've been in contact. More information on the G37 application soon, possibly as soon as January.

 

I emailed him. Would be interested in this also.