I’m Testing DOUBLE PUMPER Vs. VACUUM SECONDARY, 750 vs. 600 CFM Carburetors

In this video I am testing and tuning a 750-cfm double pumper and a 600-cfm vaccum secondary Holley-type carburetor to see which one works best for a mild V8 application for the street. Victim: The Red Duster.

ALSO, I am giving away my 1990 Chevy Suburban 4x4 and $5,000! You’ve seen this truck in three episodes on my channel, and I hope the winner uses the money for a great road trip. Enter before December 7, 2025*

HERE’S THE LINK TO FREIBURGER’S SUBURBAN GIVEAWAY: https://shop.davidfreiburger.com/page...


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*NO PURCHASE IS NECESSARY TO ENTER OR WIN. Sweepstakes ending 12/7/25 is open to legal residents of the 48 contiguous U.S. and D.C. who are at least 18 years of age or the legal age of majority in their jurisdiction of residence at time of entry. Must have a valid driver’s license. Grand Prize is a 1990 Chevy Suburban 4x4 and $5,000. To view additional prizes, Official Rules, and mail-in details, visit https://shop.davidfreiburger.com/. Sponsored by Freiburger Media, Burbank CA 91505. Void where prohibited.