Bill and Nancy Griffin's Carrera 257 Effect began life in 1998 with an 509  cubic inch Teague Custom Marine engine producing 850 horsepower. Bolted to the transom was a Bravo drive  and an IMCO stand-off box.  In this configuration the  boat was fully capable of breaking the magical 100-mph mark.  The boat also graced the cover of the August 1998 Hot Boat magazine. After a couple of seasons, Bill & Nancy ( mostly Bill! ) decided it was time to up the power production.  They turned to the services of Larry Peto who runs Larry's Speed & Marine out of Tucson, AZ.  The shortblock was stroked to 540 cubic inches using a Lunatic crank, rods and JE dished blower pistons. The original Merlin square port heads were retained. A solid roller cam was added and it was all topped off with a new Blower Shop 8-71 supercharger.  Peto dialed the motor in on his  dyno and was rewarded with a peak power reading of 1011 horsepower. This cat is now capable  of running 110 mph!