Should I advance my cam?

da_raabi

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A couple years ago I installed a COMP Cams Magnum 11-207-3 in my 454. The bottom end is stock, stock peanut heads, dual plane intake. Pretty stock motor other than the cam, intake, and headers and looow stock compression.

I've never been too impressed with the performance post cam install. I realize this cam is probably too big for the compression and heads I have, but at this point it's what I've got.

So here is a question. I installed the cam "straight up" dot-to-dot on the timing gears. What effect would there be if I advanced the cam a few degrees? This should bring the dynamic compression up a bit, right? Would this be beneficial in this application?
 

QBuff02

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You are probably pretty far out of the effective range of compression for that cam. When you installed it "dot to dot" there's really no way to know for sure if it's installed correctly (per the cam card) unless you degreed it which it sounds like is not the case. So with that being said, we know the cam is too big for your current combo and advancing it say 4 degrees is a small crutch and may help with the way it runs by closing the intake valves sooner to get back a little of the dynamic compression you need. but how much it will is somewhat of a guess. Is it already ground advanced per the card as a lot of cams are? The best way would be to degree that cam and find out where it's home really is. You might be for example 2 degrees retarded as installed and could advance it say 6 degrees to get it to 4 degrees of advance from spec. There are lots of variables involved here and measuring is the only way to truly know. I have a feeling no matter what you do the engine is just going to be "lazy" given the components but if money, time, parts or you're dead set on keeping that cam for now, etc. then i'd gamble on advancing it and see where you end up.
 

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