10/16/2026
Another great dyno session at Sonny's World Class Racing Engines with a 8.1L BBC marine engine stroked to 550cid and a Whipple Superchargers on top. This one took some time due to an intermittent mid-pull miss and I leaned on some great tuners especially dyno operator Jr Ward to help figure it all out. Derrick's beast made 921hp and 1050ft/lbs with 9.5psi of boost on pump gas with a Holley HP and Fuel Injector Clinic 1000cc injectors. Enjoy all the glorious noise!!