Guest Anonymous Posted July 1, 2001 Share Posted July 1, 2001 5.0 guys, what size carb are you using (if carbed)? The reason I ask is because some manufacturers seem to recommend using a 500 cfm on 5.0 and smaller engines. I am wondering if I can use a 600 cfm Edelbrock and just tune it down a little. I want to do this so that if I decide to go with a bigger engine in the near future I won't have to pop for a bigger carb. Just planning ahead! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted July 1, 2001 Share Posted July 1, 2001 You can use the 600 no problem. The way a edelbrock carb works, it'll meter fuel accordingly. My brother used a 450 cfm edelbrock on a 215 in buick v8 and it worked fine. 600 cfm will be no problem for the 5.0 Just for point of reference, I believe the shelby 289's in the mustang used a 4 bbl of about 730 cfm! Regards, Lone Quote Link to comment Share on other sites More sharing options...
Kevin Shasteen Posted July 2, 2001 Share Posted July 2, 2001 Remember this formula when contemplating the purchase of a carburetor: Displacement x RPM's/3456....multiplied by VE% VE = Volumetric Efficiency. RPM's = the max rpm's you think you'll be running Just because an engine comes from the factory w/a smaller CFM carb doesnt mean you cant use a larger CFM carb. I believe the last time this subject came up-the thread was a pretty good one. The premise of that thread was, "Why do some set up's use a CFM carb larger than needed?" We hashed it out & came up w/the answer that a larger CFM carb (tuned to your needs) can be used as it aleviates the atmospheric restrictions a smaller CFM carb would & therefore max airflow, at peak power rpm's, would allow your engine to run better; however-like anything there is always a give & take. If you choose a larger carb you're engine will be (may be/might be) sluggish at lower rpm's up to the pont your engine hits peak power! Check the archives for "700cfm or 750cfm"; I think that was the name of the thread; and it was somewhere from 6 months to a year ago. Kevin, (Yea,Still an Inliner) Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted July 2, 2001 Share Posted July 2, 2001 I have built several carbureted 302. My experience says don't over-carb. I was most happy with Holley 600 double-pumper. I later tried a 750 and a 700. The engine was much more crisp with the 600 DP. So, If it me, I'd go with a 600 or 650. Quote Link to comment Share on other sites More sharing options...
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