The real engine gurus know there’s a difference between peak top horsepower and sustainable top horsepower. Although an engine might be able to be jetted, tuned, leaned-out and gapped enough to pull of some pretty impressive numbers on the dyno, that’s not to say it’ll hold together when the rubber meets the road. “Dyno Mules” are fun and all, but don’t hold a candle to the engines that consistently make big numbers day in and day out. Those are the real heroes.
Below we’ve included the original dyno pull of Peteris Kitins‘ wicked 1.9-liter, stroked and bored, turbocharged Yamaha SVHO powerplant from November of last year. As you pay close attention, you’ll see that the Latvian’s monster engine cranks out well over 520-horsepower (we saw 524) before shutting down. That, of course, is a stellar number and should be enough to entice anyone to follow suit. But, Peteris and the crew of North Custom, Evgeny Erukhimov (engineer) and Udo Oga (mechanic) knew that the rigors of closed course racing out devour that engine in no time, so modifications were made to ensure his investment would last.
A second dyno pull made in May produced a still impressive 503-horsepower at 7,700 rpm. Fitted with oversized, lightweight CP Carillo pistons and rods, all pressed by a Garrett GT30 1.5 bar turbo at 18psi. But the uniqueness of Peteris’ Yamaha goes even further, below the beltline is not a Yamaha hull, but a Sea-Doo RXP-X T3 hull. The unusual combination squarely places Peteris in the Open GP runabout classes (if the snarling 500-plus-horsepower engine didn’t already).
The “FZRXP” – as we like to call it – has already clinched Peteris some wins in local events and is sure to gain some more notoriety in the months to come. Until then, watch both the original dyno pull, and Peteris’ two test runs with this monster below: