The holley power valve
Had an issue with low power take off, trying not to activate the secondaries .like as heavy throttle from a red light The power valve crossover point governed by the pv spring tension was not happening even with vac down to the rating of the pv,had very lean off the scale readings.After further test Ive come to learn the pv ratings based on eng vac that holley recomends is foolish.I SET MY PV 2 INCH BELOW IDLE OR CRUISE VAC.Even with a 10 is was still not opening at heavy pt.It wasn't untill i removed spring and sttetched it out that fuel enrichment was being added aprox 13in pv is what it took.fwiw
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76 T/A 455, cnc chamber E heads,OF hyd roller ,yella terra shaft rockers 11.47 119
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01-18-2021, 07:42 PM
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