Thread: Power valve do I need one?

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The use of a power valve lets a carb (Holley in this case) be set up to run leaner during normal everyday to the market/school drives for more effiency but will richen up the mixture equal to 5 -6 jet sizes at a low vacume which occurs at higher throttle positions-

These days-------fuel sucks, no such thing as vacume(well if there was a perfect vacume there wouldn't be anything so evedently there isn't any such thing as vacume)

How much etonal does your fuel have in it? If you are racing why not use 100+ race fuel? For racing you could lock the advance in dist and only retard it for starting--

Have you verified tdc and all the markings on your crank pulley???

Originally Posted by jerry clayton

The use of a power valve lets a carb (Holley in this case) be set up to run leaner during normal everyday to the market/school drives for more effiency but will richen up the mixture equal to 5 -6 jet sizes at a low vacume which occurs at higher throttle positions-

These days-------fuel sucks, no such thing as vacume(well if there was a perfect vacume there wouldn't be anything so evedently there isn't any such thing as vacume)

How much etonal does your fuel have in it? If you are racing why not use 100+ race fuel? For racing you could lock the advance in dist and only retard it for starting--

Have you verified tdc and all the markings on your crank pulley???

Jerry TDC has been verified,
I have heard locking the advance WOT makes for a poor running engine at idle and makes unnecessary heat, I cant run through the pits like a nascar after all you gotta drive like granny going to church
$3.00 a gallon is nice price for fuel going down the track, I wouldn't consider using race fuel unless we jacked the compression ratio.