Valve geometry hell |
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Valve geometry hell |
malcolm2 |
Jun 25 2020, 09:19 PM
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#1
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
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? |
malcolm2 |
Jun 30 2020, 07:53 AM
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#2
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
Len and i talked about other machine work. IIRC he does not do walk in stuff. Mostly his own head work. I was lucky on my 1911 build in 2012. HAM found a 2nd 1.8 head for me and rebuilt 2 for me. This time i went with new type 4 store camper specials. Built by HAM. I got better service working with LEN the 1st time vs TIV store.
As of right now I ended with IN 0.430 and EX 0.408 both yielded a good 1/2 lift angle. Just a smidge of swivel foot clearance with no counter sink. |
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