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Degreeing the Cam

Moderator: Mod Squad

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StarDiero75
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Degreeing the Cam

Post #1 by StarDiero75 » Mon Mar 16, 2020 11:23 pm

Howdy guys,

So with my cam I just finished degreeing it. My cam card says, 112 lobe sep and degree intake lobe to 110. After doing the .050" before and after, i got 107 degrees on the intake. Does that mean I'm 3 degrees advanced or 5 degrees?

Thanks,
Ryan
--1965 Ranchero w/1966 200, dual friction diaphram 9" Modern Driveline clutch and billet flywheel all balanced, 1985 SVO WC T5 with front shift, 1966 2.8 Ford 8", 2V converted built 1980 head, Autolite 2100 1.08, Dual out VI headers, Custom curved DUI, 256H Schneider cam 2.5 degrees advanced with dual roller chain, 2" exhaust with H pipe and Flowmaster 40s
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Econoline
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Re: Degreeing the Cam

Post #2 by Econoline » Mon Mar 16, 2020 11:44 pm

5
It ain't gonna fix itself

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StarDiero75
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Re: Degreeing the Cam

Post #3 by StarDiero75 » Tue Mar 17, 2020 4:15 pm

I double checked it, i was alightly off. It is at 109.5, so only 2.5 degrees advanced, thats where its staying
--1965 Ranchero w/1966 200, dual friction diaphram 9" Modern Driveline clutch and billet flywheel all balanced, 1985 SVO WC T5 with front shift, 1966 2.8 Ford 8", 2V converted built 1980 head, Autolite 2100 1.08, Dual out VI headers, Custom curved DUI, 256H Schneider cam 2.5 degrees advanced with dual roller chain, 2" exhaust with H pipe and Flowmaster 40s
--Creator of the only Weber 32/36 conversion video

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wsa111
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Re: Degreeing the Cam

Post #4 by wsa111 » Tue Mar 17, 2020 4:56 pm

That's perfect, the timing chain will stretch will bring you back to the 2 degree advance setting.
67 mustang,C-4, with mod. 80 hd, custom 500 cfm carb with annular boosters, hooker headers, dual exh.-X pipe, flowmaster mufflers, DSII dist. MSD-6425CL & MSD-Blaster 8252 Coil. Engine 205" .030" over with offset ground crank & 1.65 roller rockers. 9.5 comp., Isky 262 cam.
2003 Ford Lightning daily driver. Recurving Distributors. billythedistributorman@live.com
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CNC-Dude
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Re: Degreeing the Cam

Post #5 by CNC-Dude » Tue Mar 24, 2020 4:41 pm

Its actually not 5° as mentioned above, your reading on the intake centerline of 107° is 3°advanced. The separation angle of 112°is fixed and cannot be changed without having the camshaft reground, and is not affected by advancing or retarding the camshaft.
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Re: Degreeing the Cam

Post #6 by CNC-Dude » Tue Mar 24, 2020 4:43 pm

StarDiero75 wrote:I double checked it, i was alightly off. It is at 109.5, so only 2.5 degrees advanced, thats where its staying


It's only .5°advanced, or close enough to call it on the money based on the cam cards recommended 110° on the intake!
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Econoline
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Re: Degreeing the Cam

Post #7 by Econoline » Wed Mar 25, 2020 12:37 am

The concept of "ground in" advance is only relevant if the cam is indexed properly by the grinder. i.e. when installed on the dot's it's got, in this case, 2 deg advance. 107 c/l would still be 5 deg advanced. Sounds like they got it right. 2.5 is good.
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drag-200stang
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Re: Degreeing the Cam

Post #8 by drag-200stang » Wed Mar 25, 2020 8:42 am

I like to check my work on the the center line method, by also checking that the valve events match the cam card , while only turning the crank clockwise.
66 Mustang Coupe
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Went 9's when 10's was fast.

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