Notices
C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Throttle pedal adjustment stop?

 
Old 05-10-2011, 03:02 PM
  #1  
SG4206
CF Senior Member
Thread Starter
 
SG4206's Avatar
 
Member Since: Oct 2004
Location: Pipe Creek TX
Posts: 510
Thanked 1 Time in 1 Post
Default Throttle pedal adjustment stop?

I pulled the gas pedal assembly out to install a new alum. one to match the brake and clutch pedals. Upon inspection of this unit , I noticed a phillips head eccentric at the stop postition of the pedal arm. Can anyone comfirm that this will adjust the pre-load or slack felt in the pedal movement?
My car has always had a slight movement in the pedal before engine response.
SG4206 is offline  
Old 05-10-2011, 06:32 PM
  #2  
Ammo
CF Senior Member
 
Ammo's Avatar
 
Member Since: Dec 2004
Location: Sammamish WA
Posts: 2,458
Thanked 144 Times in 113 Posts
Default

I did the same thing and noticed it. I thought it might allow a bit more pedal play (potentiometer play) and therefor a bit more speed a top end. Curios to see what the experts say.
Ammo is offline  
Old 05-10-2011, 08:13 PM
  #3  
BEZ06
CF Senior Member
Support Corvetteforum!
 
BEZ06's Avatar
 
Member Since: Jan 2005
Location: Daytona Beach FL
Posts: 10,915
Thanked 756 Times in 548 Posts
Default

I've put Elite Engineering accelerator pedals on all three of the C6's I've owned, and I've never noticed any screw that offers any ability to adjust anything on the pedal.

I also looked in my '06 and '10 Service Manuals and there's absolutely no mention of anything that can be adjusted on the pedal.

I'm not sure what you're looking at, but it might just be the screw that holds the APP sensor (Accelerator Pedal Position sensor - there are actually 2 of them: APP1 and APP2) to the pedal.

So.....I don't believe that there is anything that you can adjust, and if there is I don't recommend messing with it. If you need to adjust some throttle parameter like idle, you need to tune the ECM.

The stock throttle response is really crappy - I've had a lot of lag on all three of the C6's I've owned.

On my '05 Coupe I tuned it with a Predator and the improvement in throttle response was one of the best things from the tune.

For my '06 Z06 I used LS1Edit to tune the car, and again the quicker throttle response was one of the best features of the tune.

With a tune, you can adjust the throttle tip-in to make the throttle come on a lot quicker. And of course a tune can improve power on even a stock engine - I think the forum wisdom is probably 10 or 15 hp increase from a tune even without any other mods.

However, because a tune might possibly void the warranty, I haven't yet tuned my '09 ZR1. But, the throttle response was really lousy, and I really wanted to improve it.

I got a SprintBooster unit and it really perked up the throttle to what I wanted. It's not cheap, but cheaper than getting the car tuned, but you don't get the other benefits of a tune, but you won't possibly void the warranty either.

Bob

Last edited by BEZ06; 05-10-2011 at 08:15 PM.
BEZ06 is offline  
Old 05-10-2011, 10:57 PM
  #4  
Ammo
CF Senior Member
 
Ammo's Avatar
 
Member Since: Dec 2004
Location: Sammamish WA
Posts: 2,458
Thanked 144 Times in 113 Posts
Default

I only noticed it because I removed the pedal and bracket from under the dash. I tried to remove just the pin like other folks have done here but someone posted a while back to just drop the entire pedal and bracket. Made the job much easier.
Ammo is offline  
Old 05-10-2011, 11:26 PM
  #5  
BEZ06
CF Senior Member
Support Corvetteforum!
 
BEZ06's Avatar
 
Member Since: Jan 2005
Location: Daytona Beach FL
Posts: 10,915
Thanked 756 Times in 548 Posts
Default

Originally Posted by Ammo View Post
I only noticed it because I removed the pedal and bracket from under the dash. I tried to remove just the pin like other folks have done here but someone posted a while back to just drop the entire pedal and bracket. Made the job much easier.
I've done it both ways.

Removing the entire pedal assembly makes it easy, but if you know how to push the pin out with a C-clamp and socket then it's very easy doing the job without removing the pedal assembly.

Either way, the upgrade to a nice aluminum pedal is worth the few minutes it takes to install it:




Mine in the picture above is the EE heel-n-toe pedal - it's wider to allow better heel-n-toeing when downshifting.

I've got their matching aluminum dead pedal.

Bob
BEZ06 is offline  
Old 05-11-2011, 11:26 AM
  #6  
SG4206
CF Senior Member
Thread Starter
 
SG4206's Avatar
 
Member Since: Oct 2004
Location: Pipe Creek TX
Posts: 510
Thanked 1 Time in 1 Post
Default

Since no one knows really what this screw might do ; I'm going to pull it out and see if it will turn. I remember the other end of the shaft having a riveted looking head; so this might spin. Probably won't get to it until this weekend.
SG4206 is offline  
Old 05-11-2011, 11:39 AM
  #7  
Tikiman12
CF Senior Member
 
Tikiman12's Avatar
 
Member Since: Jun 2006
Location: Delray Beach Florida
Posts: 1,728
Thanks: 0
Thanked 1 Time in 1 Post
Default

why would the position of the pedal matter, its electronic. when you push the pedal down it does not pull a wire like on older style cars. Thus if you Stab the pedal to the floor the car reacts different then if you compress the pedal to the floor. You want that instant power, Stab the pedal
Tikiman12 is offline  
Old 05-11-2011, 12:16 PM
  #8  
SG4206
CF Senior Member
Thread Starter
 
SG4206's Avatar
 
Member Since: Oct 2004
Location: Pipe Creek TX
Posts: 510
Thanked 1 Time in 1 Post
Default

Originally Posted by Tikiman12 View Post
why would the position of the pedal matter, its electronic. when you push the pedal down it does not pull a wire like on older style cars. Thus if you Stab the pedal to the floor the car reacts different then if you compress the pedal to the floor. You want that instant power, Stab the pedal
I don't think you understand my problem. My gas pedal has a dead spot at the beginning of the stroke. This makes an irratating feel, during normal take off from a dead stop.

Fast starts are no problem , like you say ; stab the pedal.

If this screw doesn't function as an adjustment ; I will figure out some kind of shim to fix my problem.
SG4206 is offline  
Old 05-11-2011, 01:03 PM
  #9  
Ammo
CF Senior Member
 
Ammo's Avatar
 
Member Since: Dec 2004
Location: Sammamish WA
Posts: 2,458
Thanked 144 Times in 113 Posts
Default

BEZ06,
Is that the switch for your NPP/Z06 valves on the dead pedal? I did the exact same thing with mine.
Ammo is offline  
Old 05-11-2011, 02:30 PM
  #10  
BEZ06
CF Senior Member
Support Corvetteforum!
 
BEZ06's Avatar
 
Member Since: Jan 2005
Location: Daytona Beach FL
Posts: 10,915
Thanked 756 Times in 548 Posts
Default

Originally Posted by Ammo View Post
BEZ06,
Is that the switch for your NPP/Z06 valves on the dead pedal? I did the exact same thing with mine.
Good eye!!!

Yep - I went with the "old school" push-button switch for my 2009.

For my 2006 I have the wireless remote. It has the early visor and the buttons are very easy to program - and I programmed the visor buttons to operate the valves.

The new visor is harder to program. I think there's a wireless valve controller that will allow you to program the newer visor buttons, but I went with the push-button, and I really like it!!

Bob
BEZ06 is offline  
Old 05-11-2011, 09:47 PM
  #11  
KENS80V
CF Senior Member
 
KENS80V's Avatar
 
Member Since: Aug 2004
Location: Oakbank Manitoba
Posts: 2,405
Thanked 48 Times in 45 Posts
Default

Here's a couple of pictures of the cam in question.....



KENS80V is offline  
Old 05-12-2011, 10:40 AM
  #12  
Ammo
CF Senior Member
 
Ammo's Avatar
 
Member Since: Dec 2004
Location: Sammamish WA
Posts: 2,458
Thanked 144 Times in 113 Posts
Default

Note that the center of the philips head slots are off center so the screw acts as a cam to adjust something, what we don't know? Anyone.
Ammo is offline  
Old 05-12-2011, 12:11 PM
  #13  
SG4206
CF Senior Member
Thread Starter
 
SG4206's Avatar
 
Member Since: Oct 2004
Location: Pipe Creek TX
Posts: 510
Thanked 1 Time in 1 Post
Default

Originally Posted by KENS80V View Post
Here's a couple of pictures of the cam in question.....



This is interesting - your pic shows the pedal up on part of the cam. My pedal from the factory , is on lowest spot of the cam.
SG4206 is offline  
Old 12-04-2016, 10:56 PM
  #14  
Z51LS3
CF Senior Member
 
Z51LS3's Avatar
 
Member Since: Feb 2012
Location: London Ontario
Posts: 141
Thanked 4 Times in 4 Posts
Default

Originally Posted by SG4206 View Post
Since no one knows really what this screw might do ; I'm going to pull it out and see if it will turn. I remember the other end of the shaft having a riveted looking head; so this might spin. Probably won't get to it until this weekend.
My car does this too sometimes. Did you ever figure it out?
Z51LS3 is offline  
Old 12-05-2016, 12:02 PM
  #15  
KENS80V
CF Senior Member
 
KENS80V's Avatar
 
Member Since: Aug 2004
Location: Oakbank Manitoba
Posts: 2,405
Thanked 48 Times in 45 Posts
Default

The eccentric cam is for adjusting the voltage output. It is set at a predetermined range from the factory. It has nothing to do with the mechanical performance of the pedal.
KENS80V is offline  
Old 12-09-2016, 12:29 AM
  #16  
Z51LS3
CF Senior Member
 
Z51LS3's Avatar
 
Member Since: Feb 2012
Location: London Ontario
Posts: 141
Thanked 4 Times in 4 Posts
Default

Originally Posted by KENS80V View Post
The eccentric cam is for adjusting the voltage output. It is set at a predetermined range from the factory. It has nothing to do with the mechanical performance of the pedal.
What does it control again?
Z51LS3 is offline  
Old 12-09-2016, 12:40 AM
  #17  
KENS80V
CF Senior Member
 
KENS80V's Avatar
 
Member Since: Aug 2004
Location: Oakbank Manitoba
Posts: 2,405
Thanked 48 Times in 45 Posts
Default

Originally Posted by Z51LS3 View Post
What does it control again?
Setting the base voltage output of the pedal. Each pedal assembly is different. This eccentric cam allows them all to be adjusted within a certain value.
KENS80V is offline  
Old 12-22-2016, 11:56 AM
  #18  
Z51LS3
CF Senior Member
 
Z51LS3's Avatar
 
Member Since: Feb 2012
Location: London Ontario
Posts: 141
Thanked 4 Times in 4 Posts
Default

Originally Posted by KENS80V View Post
Setting the base voltage output of the pedal. Each pedal assembly is different. This eccentric cam allows them all to be adjusted within a certain value.
ahh i see. So it wouldnt have anything to do with how soon the pedal begins to change voltage then? (The initial Dead space)
Z51LS3 is offline  

Thread Tools
Search this Thread
Quick Reply: Throttle pedal adjustment stop?


Sponsored Ads
Vendor Directory

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: