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05-31-2024, 01:11 PM | #11 |
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Re: OK, Stocker "valve jobs".
SBC is 23 degree, SBF is 20 degree, etc.
What's BBC, 24 and 4, I believe, on the intake side.
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Phil Molski PMR Performance S/C 1623 |
05-31-2024, 02:05 PM | #12 | |
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Re: OK, Stocker "valve jobs".
Quote:
Okay then , if that's what it now means. But it's not what it used to mean, and I go back over 50 years with S/SS tear downs. ;-)
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05-31-2024, 02:43 PM | #13 |
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Re: OK, Stocker "valve jobs".
Ya know, NHRA is notorious for being very vague and sometimes misleading with the wording of some of it's rules. That IS intentional. Many times I have contacted Tech Inspectors for clarifications and TWICE by TWO different Inspectors I've been told "we don't want you to ask for permission, we want you to beg for forgiveness!"
I will hope that the "any valve job" means what it says and I won't be throwing out a very good set of heads. OBTW, talking about "valve (stem) angles, have you ever checked a set of SB heads after they've been cut .120 or more?
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05-31-2024, 02:56 PM | #14 |
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Re: OK, Stocker "valve jobs".
Correct Mark, they do give you a plus or minus ONE degree
Angle milled .120 would be just shy of a degree and a half, so, yes, technically illegal, but only if they actually know how to measure
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Phil Molski PMR Performance S/C 1623 Last edited by pmrphil; 05-31-2024 at 03:12 PM. |
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06-01-2024, 10:09 AM | #15 |
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Re: OK, Stocker "valve jobs".
Wouldn't angle milling the deck surface of the heads be a lot less work to basically accomplish the same goal?
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06-01-2024, 11:17 AM | #16 |
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Re: OK, Stocker "valve jobs".
That's what Billy was talking about
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Phil Molski PMR Performance S/C 1623 |
06-01-2024, 12:37 PM | #17 |
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Re: OK, Stocker "valve jobs".
Question here, for anyone.
How would tech check the valve incline angle during a tear down, on a canted valve type engine....or any engine , for that matter ? I don't know, and I've never seen it done.
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06-01-2024, 12:50 PM | #18 |
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Re: OK, Stocker "valve jobs".
Is it better to do the valve job before or after you port the heads?
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06-01-2024, 01:22 PM | #19 |
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Re: OK, Stocker "valve jobs".
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06-01-2024, 06:12 PM | #20 |
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Re: OK, Stocker "valve jobs".
Level the head with deck surface up, and use an angle finder on the face of the valve. Similar to checking "things" out on a floating head type of seat and guide machine. Canted valve check would be the same process.
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Phil Molski PMR Performance S/C 1623 |
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