Small block ford v8,s love increased timming. This has nothing to do with carb
setting good or bad.
chris m williams
Bob Palmer wrote:
> Listers,
>
> I have mentioned several times in the past that my engine runs best with
> way more spark advance than is normal. This, and other problems were all
> completely resolved when I replaced my old, faulty spark coil. I'm now
> running happily with 11 degrees initial and 36 degrees total spark advance.
> In trying to fix the symptoms, I made some changes to the carb, including
> changing the power valve. Now I want to adjust the carb optimally. I hooked
> up a vacuum gauge with a long tube so I could watch it while driving and
> determined that I probably wanted the power valve to kick in at around 10"
> of mercury. The 600 cfm, vacuum secondary Holley carb came originally with
> a 7.5 power valve and 64 jets. This was a bit lean for my motor, so I
> finally settled on 67 jets, but kept the 7.5 power valve. A few days ago I
> tried a different setup; I went to 63 jets and a 9.5 power valve. So far I
> like it a lot better than the previous setup. I may try a 8.5 power valve
> with the same jets and see if this still works as smoothly. I'm trying to
> improve gas mileage AND keep the motor responsive too. I realize the
> precise power valve and jets depends on the motor parameters, but what
> combination have any of you found that works well.
>
> Bob
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