Running one is in favor of not fouling the plugs during an idle state. Then again, how much time do you spend at idle when drag racing ?? Start up and the short time getting to the box ??
But since you are only looking at running 4-6 jet sizes fatter when not using a PV... it really isnt too much of a worry. 4-6 jet sizes isnt going to necessarily foul plugs... in fact it will barely just show up on the plugs from the slight enrichment.
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