NettetHolley recommends the following guidelines for optimum performance and economy gains from the use of two-stage power valves: 1. The two-stage power valve works most … Nettet5. nov. 2015 · The power valve is there to restrict fuel to the main jets and then open fully (no restriction) at the stamped vacuum level. I believe Holley recommends going up at least 4 jet sizes if you remove the power valve. I prefer to keep it in as it makes idling around easier on the plugs, etc.
Power valve sizing/tuning question, Holley 3310 Team Chevelle
NettetHolley recommends the following guidelines for optimum performance and economy gains from the use of two-stage power valves: 1. The two-stage power valve works most effectively in vehicles with a weight/engine displacement ratio of 14:1 or greater. 2. Nettet24. jul. 2024 · How to select and install the right jets and power valves for your Holley carburetor. Includes information on jet extensions, when and where to to use power valve block offs, using vacuum... bostik clear adhesive
How To Tune The Power Valve In A Holley Carburetor
Nettet7. mar. 2013 · If you divide the vacuum reading and it falls on an even number, you should select he next lowest power valve number. For example, a vacuum reading of eight inches divided by two give you the … Nettet7. jul. 2006 · The 6.5 power valve should be fine. It seems that everyone has their own theory on power valves. Your 6.5 PV will enrich the fuel/air mixture sooner than a 4.5 would. That being said, your mileage depends on how you drive. Hook up a vacuum guage and drive around. Are you below 6.5 a lot of the time? Nettet25. mar. 2010 · I have 11 vacum at best at idle. i run a 4.5 power valve. ( thats the way i have been tought to select the powervalve size ..vacum at idle divide 2. if it lands on a number thats not a powervalve size then go the next size down) i know there are other ways but its what i did. I also had the 6.5 stock powervalve and had a small hesitation … bostik color chart