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650 holley on 93 octane jet size?
out of the box holley hp 650 cfm. came with 6.5 valves and 72 jets front and rear. Is that a good starting point?
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Originally Posted by
rocklefty19
out of the box holley hp 650 cfm. came with 6.5 valves and 72 jets front and rear. Is that a good starting point?
Do yourself a huge favor and have the carb tuned for your application. There's a lot more to it than just jets and power valves. The 604 crate has a pretty specific fuel curve requirement that most carb builders are very familiar with.
JDR has been great to work with for us and there are many other reputable builders out there.
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