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03-18-2021, 09:41 AM
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#1 |
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Cam I.D. help needed
Anyone know the specs of the following cam? It's an older SBC Super Stock cam.
Comp Cams 4484/312-8 R6 Grind number R 7305 Comp was no help. Thanks in advance.
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Joe Marcinowski 3377 STK Last edited by Joe Marcinowski; 03-18-2021 at 09:44 AM. |
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03-18-2021, 10:11 AM
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#2 |
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Re: Cam I.D. help needed
Don't know what you are looking for. This is from an older Comp Cams Master List I have.
Stan |
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03-18-2021, 10:19 AM
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#3 |
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Re: Cam I.D. help needed
Stan had the intake correct, high ratio, high RPM Super stock, using 1.8 - 2.0 rocker.
The 312-8 is a High torque .440 lobe, 312 adv., 284 @.050, 1.5 through 1.7 rocker ratio. And you probably know it was ground on a 106 lobe separation. Phil
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Phil Molski S/C 1623 |
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03-18-2021, 10:43 AM
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Re: Cam I.D. help needed
OK here is what is listed the exhaust lobe.
Stan |
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03-18-2021, 12:33 PM
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#5 |
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Re: Cam I.D. help needed
Stan and Phil...thank you!
Any thoughts on a lash setting?
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Joe Marcinowski 3377 STK Last edited by Joe Marcinowski; 03-18-2021 at 12:53 PM. |
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03-18-2021, 01:02 PM
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Re: Cam I.D. help needed
Quote:
No, I don't have any idea on lash settings. But remember lash will depend / change based on what rocker arm ratio you are using. Stan PS - I found this. It might be a good starting point Last edited by Stan Weiss; 03-18-2021 at 01:34 PM. |
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03-18-2021, 01:42 PM
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#7 |
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Re: Cam I.D. help needed
I went through the Master Lobe Catalogue and came up with the same as Stan The side bar mentions .020. Try that. My 302 Ford with a Crane 448511 cam.254/262 with .599 lift lashes at .020 hot. Sounds like my stick is a lot like yours. Just Blue
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Dale Shearon 68 Mustang 6394 |
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03-18-2021, 02:02 PM
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Re: Cam I.D. help needed
What should lash change be when changing ratios? Say .020 with 1.6 then change to 1.7's what change in lash?
Terry |
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03-18-2021, 02:08 PM
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#9 | |
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Re: Cam I.D. help needed
Quote:
The valve lash * new rocker arm ratio / old rocker arm ratio. ► .020" * 1.7 / 1.6 = 0.02125" Stan |
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03-18-2021, 04:13 PM
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#10 |
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Re: Cam I.D. help needed
Wallace Racing has a calculator for lash change with rocker change.
http://www.wallaceracing.com/calc-lash.php
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Dale Shearon 68 Mustang 6394 |
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