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Old 08-04-2010, 08:39 PM
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did you switch to manifold vac for the vacuum can on the HEI? did you see what your total advance (initial + mech) was with the vac can disconnected when you reved it to 3500? is 3500 enough to get the mech advance to stop moving or adding advance? did you check what the total advance is with the vac can hooked up (initial + mech + vac advance) @ 3500 rpm?, 15 "hg is not bad, what was the idle rpm at this value? I would expect more than 15 " hg at 800 rpm in park with a 204/214 duration cam, not a big deal with only 15 though.
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