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Re: Camshaft
well, the first thing to keep in mind is that stock vortec heads dont allow for very high valve lift, i think somewhere in the upper 400's in thousandths of an inch. if you are using a stock torque converter, go no bigger than a comp cams 268 extreme energy cam. this actually may have more lift than the heads can accomodate.
one thing to look into is scoggin dickey, which sells vortec heads with modifications to accept more lift. i think they have some that accept up to
.525 lift if i remember right. the lift your heads are limited to is not the smaller number of the actual lobes, it is that combined with the rocker ratio, so keep in mind that if you go over a 1.5 to 1 rocker ratio, the lift will be much higher at the valve.
for example, a cam with lobe lift of .330 will have valve lift of .495 with 1.5 rockers and if you put in 1.6 rockers it will raise up to .528 which is another
.033 more lift than the smaller rockers.
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