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Discussion Starter #1 (Edited)
I have run a long time with the clutch switch disengaged, almost the entire time I've owned the car. However last night I wanted cruise so I reconnected the switch. I didn't experience ANY surging in first or second gear. So I got to thinking, the ECU is spiking the rpms when the clutch is in, presumably to help drivers who are new to a manual. The main reason for the clutch disconnect thing was to fix the sudden change in the ecu from when the clutch was in to when the clutch was out. My hypothesis; clutch in, RPMs spike very easily, clutch out and rpms are linear.

I want to tape/tie down the clutch switch so it is always depressed. If my thinking is right that will stop the rpm spikes and give me a true linear pedal feel. Has anyone tried this at all? I'll give it a shot tonight when home but don't want really want to mess with it if there is a problem from leaving that switch engaged at all times.

UPDATE:
"always on"= switch plugged in and plunger taped down
"always off"= switch unplugged

I learned some valuable information. I went out and taped the switch down so it stayed always on and went for a test drive. The rev spiking seemed to be lessened but it was still there so that's debatable. However it does mean that the spiking part of it is controlled by the other switch (lower switch). Second thing I noticed, this is the big one; the RPM hang was BAD. Bad enough that I started laughing out loud while driving it. I could let off the gas, depress the clutch, shift, and the rpms would never change. It hung for a good 2 seconds easy. So now I know the rpm hang is based on the upper switch. Another thing I noticed was with the switch plugged it normally, the car pulled better. Maybe not harder than with it unplugged, but I liked the feel of it much more. Unplugged felt like the turbo was nearly at max boost all the time. now when I step on it I feel it pull then pull some more when the turbo spools up.

Here's the major thing I found that may help some people out. The switch mounts through a hole in a bracket then is held in place with two nuts, one on each side. There is a silver threaded shaft and then the black plastic plunger. Mine was mounted in the center of the threaded shaft so I backed it out until I couldn't see any more threads past the nut and tightened it up. Took it on another test drive and it seems much improved. The RPM hang is gone, it may hang for a fraction of a second but it's so hard to tell. It looks like as soon as I press the clutch in the rpms begin to fall. Also the surge I had noticed from leaving the switch "always on" was gone. That was the main reason people unplug the switch in the first place.

Long story short. If you want the benefits of an unplugged switch but keep the benefits of the plugged in switch, I would recommend you adjust it so it's as far back as it can with leaving enough threads to tighten it up. This got rid of any RPM hang, and any jerking in first and second that you get with the switch unplugged.
 

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I thought unplugging the clutch switch is the same thing as keeping it depressed?
 

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Wait are you talking about the RPM hang when you clutch in? I had a GenCoupe M/T and it did this until i got the SFR tune which eliminated the rev hang (to support new manual drivers)
 

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Discussion Starter #4
unplugging the switch is the same as depressing the clutch (switch plunger is out). depressing the switch is the same as the clutch being out all the way.

I thought unplugging the clutch switch is the same thing as keeping it depressed?
 

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Discussion Starter #5
Wait are you talking about the RPM hang when you clutch in? I had a GenCoupe M/T and it did this until i got the SFR tune which eliminated the rev hang (to support new manual drivers)
I was thinking more of the rpm spike when you are starting from a stand still and barely tap the gas. However the rpm hang could be tied into the same switch. It would make sense to me, the clutch goes in so they tell the rpms to hang and or spike depending if you are idle or not.
 

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Discussion Starter #6
bump: updated post with trial info
 

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Pictures! :)
When you say "backed it out" you mean away from the clutch, i.e. so the plunger doesn't go in as far when you press the clutch pedal?

By the way, thank you for going through all of this!
 

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Discussion Starter #8
Yes away from the clutch, so that you don't have to push the clutch in as far to disengage the switch.

I'll try to grab some pics tomorrow after work, at least of the final product. My back was starting to hurt going back and forth like this lol
 

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Discussion Starter #9
IMG_20130625_183257_293.jpg

Here's a pic of how the sensor sits now. It was extended another 1/4-1/3 inch before. Hope this helps.
 

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Discussion Starter #10
Has anyone else tried this yet? After a couple of days driving I am liking the change even more. It doesn't jerk at all when letting off the gas in first or second anymore and I don't have the issues that made me want to unplug the switch in the first place. I wonder if everyone messing with the accelerator sensor could just hook up the clutch switch and adjust it to fix their issues.
 

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Has anyone else tried this yet? After a couple of days driving I am liking the change even more. It doesn't jerk at all when letting off the gas in first or second anymore and I don't have the issues that made me want to unplug the switch in the first place. I wonder if everyone messing with the accelerator sensor could just hook up the clutch switch and adjust it to fix their issues.
Did this today.
Seems to defo reduce the rpm hang while shifting.
 

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much easier to understand thanks for the tip. gnna have to hook this up right now. Mines currently unplugged so will see what happens.
 

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Wouldn't the RPM hang help with 0-60 times? The rpm,s are kept up rather than you needing to bring back what you lost? Am I missing something?
 

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yeah im missing to point of this.. Ive read every post in the both threads about this.. I havent noticed anything in the way the car behaves with the stock setup.. Havent really noticed an RPM hang either... Is this something pertaining to Drag racing? I did a track day yesterday and did not notice one thing that was bad in they way the car performed under extreme conditions, the car was super smooth and really drove great..

However when i start off i always blip the throttle..I got used to this driving way with cable trannys with monster clutches as a daily. So maybe im masking the issue by doing this...
 

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just unplug the upper switch and you will notice a huge difference right away.
 
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I just adjusted the upper and lower switches in mine today. headed to the bank and to pick up the kids. gotta say I like it better with it completely unplugged but will drive it like this for a bit to see if it grows on me. One reason I like it unplugged better is all the burbling the exhaust makes when I take my foot off the gas pedal, ends up saving my MPG cause I like taking my foot off the gas as much as putting it on.
 

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I need to go figure out what you guys are talking about. Ive never messed with switches for the pedals before
 

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I just adjusted the upper and lower switches in mine today. headed to the bank and to pick up the kids. gotta say I like it better with it completely unplugged but will drive it like this for a bit to see if it grows on me. One reason I like it unplugged better is all the burbling the exhaust makes when I take my foot off the gas pedal, ends up saving my MPG cause I like taking my foot off the gas as much as putting it on.
You got me sold! haha i love that sound
 
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