 Clutch pedal adjustment thing on the pedal set., What is the threaded rod for ? |
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| nivekdodge |
 Sep 24 2026, 07:12 PM
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#1
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Member  Group: Members Posts: 341 Joined: 28-August 21 From: Pittsburgh Pa Member No.: 25,860 Region Association: MidAtlantic Region 
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One of the first things I remember when i started working on the first one was looking at the clutch pedal and saying to myself, " I'll probably learn why that rod is threaded like that." So clue me in
Kevin |
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| Shivers |
Sep 24 2026, 08:00 PM
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#2
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Senior Member Group: Members Posts: 3,613 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
QUOTE(nivekdodge @ Sep 24 2026, 06:12 PM)  One of the first things I remember when i started working on the first one was looking at the clutch pedal and saying to myself, " I'll probably learn why that rod is threaded like that." So clue me in Kevin This sounds reasonable: "Kinematic Engineering & "Over-Center" Action: The 914 pedal cluster utilizes a heavy assist spring. The clutch needs to be precisely dialed in so that the spring passes an "over-center" point during the first third of its travel. This reduces the physical foot effort required to hold the pedal down. A fixed cast pedal wouldn't allow the precision needed to align the pedal perfectly with this mechanical sweet spot." |
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| dtmehall |
Sep 24 2026, 08:54 PM
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#3
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Member Group: Members Posts: 369 Joined: 21-December 23 From: Michigan Member No.: 27,808 Region Association: Upper MidWest |
watch this video starting at 11:40 and again at 13:00
this should help with your install https://www.youtube.com/watch?v=-u280fQFhGQ |
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| bdstone914 |
Sep 24 2026, 09:04 PM
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#4
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bdstone914 Group: Members Posts: 5,391 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(Shivers @ Sep 24 2026, 07:00 PM) QUOTE(nivekdodge @ Sep 24 2026, 06:12 PM) One of the first things I remember when i started working on the first one was looking at the clutch pedal and saying to myself, " I'll probably learn why that rod is threaded like that." So clue me in Kevin This sounds reasonable: "Kinematic Engineering & "Over-Center" Action: The 914 pedal cluster utilizes a heavy assist spring. The clutch needs to be precisely dialed in so that the spring passes an "over-center" point during the first third of its travel. This reduces the physical foot effort required to hold the pedal down. A fixed cast pedal wouldn't allow the precision needed to align the pedal perfectly with this mechanical sweet spot." Sounds like bad Ai. The clutch spring is very weak and provides almost no assist. The spring takes up the slack in the cable. It only takes 5-10 pounds of pressure to depress the pedal with a stock pressure plate. The threaded end of the clutch pedal allows for a small amount of height adjustment. The clutch does need to be properly adjusted to minimize the pressure to depress it. |
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| dtmehall |
Sep 24 2026, 09:12 PM
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#5
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Member Group: Members Posts: 369 Joined: 21-December 23 From: Michigan Member No.: 27,808 Region Association: Upper MidWest |
sorry, i mesread his first post
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| dtmehall |
Sep 24 2026, 09:18 PM
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#6
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Member Group: Members Posts: 369 Joined: 21-December 23 From: Michigan Member No.: 27,808 Region Association: Upper MidWest |
sorry, i mesread his first post
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| Shivers |
Sep 25 2026, 04:49 AM
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#7
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Senior Member Group: Members Posts: 3,613 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
QUOTE(bdstone914 @ Sep 24 2026, 08:04 PM) QUOTE(Shivers @ Sep 24 2026, 07:00 PM) QUOTE(nivekdodge @ Sep 24 2026, 06:12 PM) One of the first things I remember when i started working on the first one was looking at the clutch pedal and saying to myself, " I'll probably learn why that rod is threaded like that." So clue me in Kevin This sounds reasonable: "Kinematic Engineering & "Over-Center" Action: The 914 pedal cluster utilizes a heavy assist spring. The clutch needs to be precisely dialed in so that the spring passes an "over-center" point during the first third of its travel. This reduces the physical foot effort required to hold the pedal down. A fixed cast pedal wouldn't allow the precision needed to align the pedal perfectly with this mechanical sweet spot." Sounds like bad Ai. The clutch spring is very weak and provides almost no assist. The spring takes up the slack in the cable. It only takes 5-10 pounds of pressure to depress the pedal with a stock pressure plate. The threaded end of the clutch pedal allows for a small amount of height adjustment. The clutch does need to be properly adjusted to minimize the pressure to depress it. I was reading an answer about this at PCA and he said the over-center has to do with the pressure plate. My bad |
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| bdstone914 |
Sep 25 2026, 06:59 AM
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#8
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bdstone914 Group: Members Posts: 5,391 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(Shivers @ Sep 25 2026, 03:49 AM) QUOTE(bdstone914 @ Sep 24 2026, 08:04 PM) QUOTE(Shivers @ Sep 24 2026, 07:00 PM) QUOTE(nivekdodge @ Sep 24 2026, 06:12 PM) One of the first things I remember when i started working on the first one was looking at the clutch pedal and saying to myself, " I'll probably learn why that rod is threaded like that." So clue me in Kevin This sounds reasonable: "Kinematic Engineering & "Over-Center" Action: The 914 pedal cluster utilizes a heavy assist spring. The clutch needs to be precisely dialed in so that the spring passes an "over-center" point during the first third of its travel. This reduces the physical foot effort required to hold the pedal down. A fixed cast pedal wouldn't allow the precision needed to align the pedal perfectly with this mechanical sweet spot." Sounds like bad Ai. The clutch spring is very weak and provides almost no assist. The spring takes up the slack in the cable. It only takes 5-10 pounds of pressure to depress the pedal with a stock pressure plate. The threaded end of the clutch pedal allows for a small amount of height adjustment. The clutch does need to be properly adjusted to minimize the pressure to depress it. I was reading an answer about this at PCA and he said the over-center has to do with the pressure plate. My bad You are forgiven True. Adjustment is at the transmission. It the clutch is out of adjustment more pressure is required. On the pedal set the clutch pedal rests on the rubber stopper so there is no adjustment on the pedals that affect the over the center action. It is affected if the flywheel is machined and the clutch fork pivot is not shimmerd out properly. |
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| JamesM |
Sep 25 2026, 02:23 PM
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#9
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Caretaker of 914s - Master of Fuel Injection Group: Members Posts: 2,312 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
QUOTE(bdstone914 @ Sep 25 2026, 04:59 AM) It is affected if the flywheel is machined and the clutch fork pivot is not shimmerd out properly. (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) Pretty much every 914 I get in this has not been done correctly on. Shimming the piviot ball makes a night and day difference in clutch feel. |
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