Most of you probably get that your carburetor is more than just a chunk of metal sitting on top of your engine, leaking fuel into the manifold. But what differentiates a good carb from a not-so-good carb? After all, the carb companies are making some great out-of-the-box pieces these days, but what seperates a good carb from a great one? We wanted to know what it takes to go from out-of-the-box to race ready, and for this we turned to carb builder Scotty McLendon who walked us through building a gauge-legal Holley 750.
Before we get started, a little backstory. In the coming months, you'll get to read about a cutting edge Super Late Model that is being build as this story is being written. We can't give away the specifics just yet, but Billy Hess is building a chassis that is certainly different than just about everything we've seen racing lately (but more on that at a later date.) As for this story, the carb we are talking about is being built for the engine that will power this new SLM. The bullet (which you will also see gracing the pages of Circle Track in the upcoming months) is a Ford Equalizer from the fine folks at McGunegill Engine Performance in Muncie, Indiana. When the discussion of parts came up, we were told we needed a "gauge-legal 750," but we didn't want to just slap an out-of-the-box leaker on it and call it good.
Wanting to make sure the induction system of our MEP powerplant is afforded every possible advantage, we turned to Scotty McLendon Carburetors to handle fuel delivery. Scotty McLendon has been building carburetors much longer than the 31 years your author has been around. He has set drag racing records, built carbs for all kinds of racing, and has offered up as much of his knowledge to help as many racers as possible. After a brief discussion about what we were building, the decision was made to start with a 750-cfm Holley 4150 carburetor (PN 0-80528-1). We brought Scotty a new carb from Holley and he showed us everything that goes into one of his race carbs. Follow along as we take a Holley 750 from box-stock to race ready.