Engine Masters tested 19 different air cleaner combinations on a 760-hp big-block.

The results apply to everything from small-blocks to monster engines.

Getting the right setting for your idle-mixture screws can be a challenge.

This video breaks down how to get the best idle mixture for a carburetor.

Running a big camshaft on the street can pose some serious drivability issues with a carburetor.

Here, Jeff Smith walks us through how to tune a carburetor with serious lift and duration numbers.

Getting your carburetor's accelerator pump tuning right can be a challenge.

Jeff Smith walks you through all the variables in this installment of the Carb Science Series.

Holley's Tom Kise goes over the proper method of adjusting your accelerator pump arm/lever interface.

Other areas of accelerator pump tuning are also touched on for the smoothest possible operation.

Many carburetors are ready to run, right from the box, but that doesn't mean you can further tune your carburetor. Summit Racing's On All Cylinders blog shows you how to tune your power valve for optimum performance and economy. Check out the video inside.

Holley's new Ultra HP carburetors have over 30 changes from the original 4150 HP line, and are sold as ready to race out of the box. Join us as we test out the Ultra HP 850 and Ultra HP 950 on our Project Blueprint Chevelle.