Fuel Delivery

I’ve used a blow gun to blow air past the little hole in the primary venturi on my Holley vacuum secondary carburetor. This barely opens the secondaries and it is […]

I recently built a 355ci small block Chevy with a flat tappet camshaft. We started the engine and ran it for less than 10 minutes at around 2,000 RPM when […]

Story Overview *** The Holley 4150 and 4160 series four-barrel carburetors came out in the 1950s. The 4150 was introduced on the 312 CID V8 in the 1957 Ford Thunderbird, […]

A Summit Racing Pro Pack is a parts combo assembled by the automotive performance experts on Summit Racing’s tech team. Each part is proven to perfectly complement the other components in the […]

In Part 1 of Hidden Assets, we covered the design and installation basics of Holley’s HydraMat fuel pickup system. Now I’ll show you how I installed one in the gas […]

Believe it or not, Holley’s HydraMat has been around for 10 years. Since it was introduced in 2014, it’s become something a ‘hidden’ asset in racing. Many racers in stock-appearing […]