911 Valve Adjusters, Starting Point Before Geometry Setting |
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911 Valve Adjusters, Starting Point Before Geometry Setting |
pilothyer |
Apr 9 2018, 12:01 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 911 Valve Adjusters, with the early rockers (modified of course) what is the starting point on the adjusters. How much do you screw them in to the rockers before you start the valve train geometry procedure. I would imagine you need to have enough threads in either direction for future valve adjustments, but how much ? Thanks for your support, I am at this critical stage on my engine now .
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mgphoto |
Apr 9 2018, 12:08 PM
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#2
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"If there is a mistake it will find me" Group: Members Posts: 1,363 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
Countersinking the hole for the threads will give a bit more adjustment.
What you want to do is have the rocker aligned straight with the valve at half lift. You may need to install shims under the rocker arm shafts. |
pilothyer |
Apr 9 2018, 01:19 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 |
Countersinking the hole for the threads will give a bit more adjustment. What you want to do is have the rocker aligned straight with the valve at half lift. You may need to install shims under the rocker arm shafts. Thanks for your input..............I fully understand the objective of setting the correct geometry. My question is this: How much (how many threads) should you leave for future adjustment for greater clearance (backing out the adjuster) I know the adjuster is way long enough for future closing the clearance, but what about for increasing it. Just looking now for a good starting point considering future adjustment both ways. |
mgphoto |
Apr 9 2018, 01:52 PM
Post
#4
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"If there is a mistake it will find me" Group: Members Posts: 1,363 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
Countersinking the hole for the threads will give a bit more adjustment. What you want to do is have the rocker aligned straight with the valve at half lift. You may need to install shims under the rocker arm shafts. Thanks for your input..............I fully understand the objective of setting the correct geometry. My question is this: How much (how many threads) should you leave for future adjustment for greater clearance (backing out the adjuster) I know the adjuster is way long enough for future closing the clearance, but what about for increasing it. Just looking now for a good starting point considering future adjustment both ways. That will be dictated by the amount of material you removed from the rocker and placement of the rocker shaft. When the hole for the adjuster is just and extension of the valve stem, a perfect straight line, looking at it from the side, than it should be positioned correctly. Are you cutting new push rods? |
pilothyer |
Apr 9 2018, 03:19 PM
Post
#5
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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 |
Countersinking the hole for the threads will give a bit more adjustment. What you want to do is have the rocker aligned straight with the valve at half lift. You may need to install shims under the rocker arm shafts. Thanks for your input..............I fully understand the objective of setting the correct geometry. My question is this: How much (how many threads) should you leave for future adjustment for greater clearance (backing out the adjuster) I know the adjuster is way long enough for future closing the clearance, but what about for increasing it. Just looking now for a good starting point considering future adjustment both ways. That will be dictated by the amount of material you removed from the rocker and placement of the rocker shaft. When the hole for the adjuster is just and extension of the valve stem, a perfect straight line, looking at it from the side, than it should be positioned correctly. Are you cutting new push rods? Yes, I will be cutting the pushrods after the geometry is correctly set with the adjustable push rod. I am trying to determine how much adjustment should be left at the adjuster for future valve adjustments should the zero gap ever close on me. |
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