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Need HEI and timing help

1K views 8 replies 7 participants last post by  novaderrik 
my Nova had about 18 degrees initial timing, with 16 degrees of vacuum advance hooked up to manifold vacuum. i set the timing to 34 degrees total.
it would idle silky smooth at 800 rpm with 16-17" of vacuum, got 17 mpg at 70 mph (3500 or so rpm's) with 3.7 gears and 26" tires, and started up right away every time.
this was with 10:1 compression, vortec heads, and the GMPP HOT roller cam that has .525 lift and plenty of duration.
i kind of miss that motor...
 
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