We've known for a long time that Superior Automotive in Anaheim, California, is a gold mine for Ford high-performance expertise. The folks at Superior Automotive work on all kinds of American muscle, but there's always something interesting going on from a Ford-performance perspective whenever we pay them a visit. From garden-variety Mustangs to the more esoteric visitors-such as a '48 Mercury convertible with a 460 conversion-on any given day, a visit to Superior always makes us feel like kids in a hobby shop.
In issues past, we visited the in-house carb shop and came away with extra horsepower. With more than 40 years of experience, Don Spaccarotella is the apostle of horsepower at the carb shop. He's especially adroit at resurrecting basket-case Holley four-barrel carbs. This time, we thought we'd throw him a curveball and see if he could get anything out of a brand-new Holley carb.
The new Holley four-barrel is a 650-cfm unit sitting atop a fresh 351 Windsor. The double-pumper carb has a mechanical secondary, and the only alteration is that the choke has been wired open. The carb has about 2,000 miles on it, and the engine runs like gangbusters. Holley knows what it's doing when it comes to building carburetors, and a new Holley four-barrel will usually run fine right out of the box provided it's appropriately sized to the engine. Such is the case with our carburetor.
When we approached Superior with the idea of throwing Spaccarotella the new carb curveball, the company agreed to the story. Its employees have confidence in their man and know he will deliver. We wanted new baseline figures before the carburetor was modified and then a second session on the Dynojet to measure the result. To eliminate as many variables as possible, our test used the same Dynojet on the same day, with the same operator. Much of what Spaccarotella does is confidential, but if you send Superior your carb, the company can modify it, new or used.
Follow us to the Dynojet at Superior to see if Spaccarotella can squeak a few more ponies out of a new carb.