 Swivel Feet on Stainless Valves, Which Way ? |
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| pilothyer |
 Apr 6 2018, 05:09 PM
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#1
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Member  Group: Members Posts: 838 Joined: 21-May 08 From: N. Alabama Member No.: 9,080 Region Association: South East States  |
When using Porsche swivel feet adjusters on stainless valves along with the steel pushrods, how should the adjusters feet be positioned on the valves? Should they be directly centered with the contact surface of the valves or should they be offset a tad?
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| mgphoto |
Apr 7 2018, 04:00 PM
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#2
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"If there is a mistake it will find me" Group: Members Posts: 1,339 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
No offset, maximum engagement, swivel adjuster will rotate the valve. Stock adjusters are offset to cause valve rotation. Zero lash with the steel push rods, I have the adjuster engage the valve tip, but I make sure the swivel foot rotates
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| pilothyer |
Apr 8 2018, 02:23 PM
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#3
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Member Group: Members Posts: 838 Joined: 21-May 08 From: N. Alabama Member No.: 9,080 Region Association: South East States |
QUOTE(mgphoto @ Apr 7 2018, 05:00 PM)  No offset, maximum engagement, swivel adjuster will rotate the valve. Stock adjusters are offset to cause valve rotation. Zero lash with the steel push rods, I have the adjuster engage the valve tip, but I make sure the swivel foot rotates Thank You for your input, I would ask this, Is the consensus of "the collective" on this matter? Or are there other opinions? |
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| Dave_Darling |
Apr 8 2018, 04:29 PM
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#4
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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I don't think there's anything specific to the swivel adjusters that will rotate the valves. If they're offset, the valves will be rotated. (You want them to rotate in order to even out hot spots and wear!)
Any idea if there is an offset in the 911? --DD |
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| McMark |
Apr 8 2018, 05:06 PM
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#5
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
The only variable in how the swivel foot contacts the valve tip is 'tuned' when you measure and cut the pushrods to length. Search for 'valvetrain geometry' here and in general on Google. There's no adjustment necessary 'left or right'.
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| Mark Henry |
Apr 9 2018, 10:16 AM
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#6
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
It doesn't matter if the adjuster is dead center.
The adjuster doesn't spin the valve, the twisting/wrapping action of the spring working does that. A stock valve the keeper allows the valve to spin, but high performance guys for decades have been grinding keepers to increase clamping force of the keeper. Since the valve/keeper no longer spins the twisting action makes the spring itself rotate, why it's important to run at least one steel shim under each spring. |
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| Dave_Darling |
Apr 9 2018, 12:32 PM
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#7
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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