 Valve geometry hell |
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| malcolm2 |
 Jun 25 2020, 09:19 PM
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Advanced Member  Group: Members Posts: 2,749 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States 
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Help me out here. Working on the subject and can’t figure it out.
9590 cam. 0.426 lift on the card. Adjustable pushrod tool. I get to 0.426 lift. But the geometry between the swivel foot and the valve is wack. That is shortening the PR. Stretch out the PR and i get 0.430 lift and almost straight valve to adjuster. The foot is too tight to the 1.7 rocker boss. Bought some shims to lift the rocker stand and try that. Question is: why am I so far off the card lift? Does it matter? |
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| Mark Henry |
Jun 26 2020, 09:49 AM
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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 |
Don't worry about the lift vs the card.
Instead worry about getting the geometry correct. I take more than .060 off and the countersink must clear the foot in all directions. I don't use shims, at least not much shim. I cut the swivel foot down and recut the slot, as the screws can/could hit the valve cover. The cool trick for doing this is to put two 32T blades in your hacksaw, first cut the slot deeper, then grind off the excess thread. |
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| malcolm2 |
Jun 26 2020, 09:55 AM
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#3
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Advanced Member Group: Members Posts: 2,749 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
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QUOTE(Mark Henry @ Jun 26 2020, 10:49 AM)  Don't worry about the lift vs the card. Instead worry about getting the geometry correct. I take more than .060 off and the champher Cool. That is the direction I was heading. Don't really have much choice otherwise. |
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Posts in this topic
malcolm2 Valve geometry hell Jun 25 2020, 09:19 PM
wndsrfr
Help me out here. Working on the subject and can... Jun 26 2020, 05:53 AM Olympic 914 When using the swivel foot on the 1.7 rocker arms ... Jun 26 2020, 06:03 AM malcolm2 I do plan on removing material. Is it about 0.060... Jun 26 2020, 06:23 AM nditiz1 I had my rockers milled, but I can't remember ... Jun 26 2020, 07:15 AM 914werke RE: Valve geometry hell Jun 26 2020, 08:33 AM
Mark Henry
[quote name='Mark Henry' post='2828271' date='Jun... Jun 26 2020, 11:03 AM malcolm2 The counter sink is a nice touch. great picture. ... Jun 26 2020, 09:49 AM malcolm2 Thanks for the input. Heads are camper specials. Jun 26 2020, 11:35 AM malcolm2 I have removed about 0.060”. There is no way i a... Jun 29 2020, 05:05 PM wndsrfr
I have removed about 0.060”. There is no way i ... Jun 29 2020, 09:19 PM Highland I used this guy and he seemed to do a good job.
h... Jun 29 2020, 11:14 PM BeatNavy
I used this guy and he seemed to do a good job.
... Jun 30 2020, 04:27 AM nditiz1
[quote name='Highland' post='2829452' date='Jun 3... Jun 30 2020, 06:44 AM TheCabinetmaker My 9550 Cam, .426 lift ended up at 436. Bonus... Jun 30 2020, 04:48 AM malcolm2 Len and i talked about other machine work. IIRC he... Jun 30 2020, 07:53 AM Jake Raby With the 9590 you should dial in around a 27.1cm p... Jul 4 2020, 06:24 PM |
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