Thread: Big Cam Really Low Vacuum?

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Originally Posted by 4speedTerror

but I am sure watching your oil pressure at idle after 15 minutes of running, is begging for a higher idle.....

Not to take this too far OT, but could you explain that one to me? I don't doubt it, since I've witnessed it in my own car, but why does lumpy cam drop oil pressure at idle? Is it simply because of the drop in vacuum? I do know this: on my own car taking it to a guy who knows what he's doing with the exhaust (just had a temp exhaust on it) smoothed things out quite a bit. Don't know my cam specs, friggin builder won't tell me like it's some secret.