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Cam degreeing question

mopar_chuck

mopar_chuck

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Decided it would be a good idea to double check the cam degrees before final assembly. It’s a .484 MP cam. The book recommends 108 degrees. First time we did it, we got 106. Double checked our steps and got the same number. Tried another timing chain and gears on it, then repeated the process and got 110 degrees. Question is, should we go buy the offset bushings to correct it to 108 OR use the set that gives us 106 or 110?
 
At 106 you would be 2 degrees advanced. I think any performance change would be minimal. Slightly better low end which is good for that cam. Piston to valve clearance is reduced. If it's a good quality timing set I would go with that one.
 
Something you wanna drive a lot? Just me I'd leave it advanced 2 at 106...110's gonna shift the powerband upwards a little more, that's all. Good when the RPMs get up there. Oh, you didn't say what size engine but for me, the bigger the engine I've always been more willing to give up a little bottom to gain mid and top. Depends on what kind of driving you wanna (mostly) do and your combo-- gears&tire size, trans/coverter, HP level etc.
 
So most comp cams are ground with a 4 degree advance in them when you see a 110 degree lobe separation and they have you run it at 106. I am thinking 2 degrees advanced wouldn't hurt anything and give you a little more down low in the rpm range. Generally advanced is a little better for low end and retarded was for high end power. I have an Engle and that is on a 110 lobe separation and they told me run it at 108 for a centerline.
 
If it was me, well I'd need a bigger wheel and stronger reading glasses. Good luck. :D
 
I degreed my cam and it was advertised to be 108 but I was getting 107.5. I advanced it 2 more degrees with the offset bushing and it is really strong down low at 105.5. I have no issues what so ever.
 
Depending on engine compression, I'll stick that cam and the 508/509 in at 102.... Makes a HUGE difference in lower RPMs
 
Crackedback said:
Depending on engine compression
Click to expand...

Depending how? Maybe I'm too tired to see the obvious..... Are you saying with higher compression you like to see the cam advanced that far? TIA, Lefty71
 
Lower compression engine, advance the cam.

Most of the stock mopar compression ratios are overstated. I've stuck that cam in stock 68-71 383-440 at 102-104. I prefer the 102 mark. Makes a big difference in how they run at lower rpm levels.

I know one of those cams also has a 112 or 114 LSA variant that is a POS. If it's the tighter LSA

The cam may have a suggested install, problem with that, sticking it in at the same ICL on a 12:1 or a 8.5:1 engine are vastly different outcomes.
 
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