 What rocker arm ratios do people see? |
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| iankarr |
 Jan 9 2022, 09:52 AM
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#81
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The wrencher formerly known as Cuddy_K  Group: Members Posts: 2,548 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region 
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I used Jake's method as the basis for my video on valve geometry...and Jake graciously agreed to be interviewed. If you're taking this project on, I hope this is helpful...
https://youtu.be/rPkHNxrvdbs |
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| 930cabman |
Jan 9 2022, 10:34 AM
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#82
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Advanced Member Group: Members Posts: 3,974 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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QUOTE(iankarr @ Jan 9 2022, 10:52 AM)  I used Jake's method as the basis for my video on valve geometry...and Jake graciously agreed to be interviewed. If you're taking this project on, I hope this is helpful... https://youtu.be/rPkHNxrvdbs Yes, thanks Ian. I have viewed it several times and will be following to a "T" |
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| iankarr |
Jan 9 2022, 10:43 AM
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#83
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,548 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region
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Please don’t do THAT lol. Jake’s method, yes…but my execution of it is surely less precise (IMG:style_emoticons/default/smile.gif). Note that one of the rocker blocks was flipped when I shot the video. I corrected it when I did the geometry for real…
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| Mark Henry |
Jan 9 2022, 11:50 AM
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#84
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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 |
There's always going to be variants of small dimensions, problem is it becomes a game of 'a dog chasing it's tail', you take a little off of here ...and it affects way over there.
As with any part of an engine build, do your research and plan well, etc, but don't get bogged down overthinking it. |
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| 930cabman |
Jan 9 2022, 04:01 PM
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#85
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Advanced Member Group: Members Posts: 3,974 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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Exactly, overthinking can be problematic. Part of the OCD thing. This engine is stock with the exception of 96mm pistons/cylinders from AA and a 266 degree cam from Elgin. .382 intake lift and .368 exhaust lift.
I have 55cc combustion chambers and 52mm deck height. Earlier today I mocked up the rocker gear today and all looks good, the rockers align nicely at half lift. |
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