what size jet in a holley
#1
#4
www.holley.com got to the tech section, there is a list of almost all of the carbs in there that tells which jets, power valves, etc that they came with listed in order by list#. Yours is 80508. The other number is a date code.
#5
I have a numerical listing & component parts. I show a 80508 as a 4160, 750 CFM rebuild kit 37-754/ trick kit 37-921. primary jets are shown as .072/ Power Valve 125-65. secondary spring is plain. I have found that sometimes they didn't come with these components but it will give you a starting point. Remember Holleys come out of the box set for sea level. I find jetting down 1 jet size per 2000 ft above sea level is a good rule of thumb.
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