The old adage of there is no replacement for displacement will always ring true, especially when the topic of a pump gas engine is the center of conversation. That cliché, unfortunately, gets lost from time-to-time during these days of the force-fed modern LS small-block engines. We've seen our fair share of boost-pumped LS bullets that make in excess of 1,000 hp and even as high as 1,500 hp. The price tags are as impressive and mind-boggling as the output of the latest small-block from the General. Adding to the complexity and cost are the turbo/supercharger units and associated plumbing, EFI, massive fuel system, and electronic controllers--you can start to see a dim picture being painted of a timely and costly installation associated with that type of build. Fear not, there are alternatives and we will revert back to the big engine comments made above--bigger is better.
We put the challenge out to Scott Shafiroff Racing Engines (SSRE) to give us a formula to make over 900 hp in naturally aspirated trim, fit under most conventional cowl induction hoods on common muscle cars, and drink 93 octane gasoline. SSRE proprietor Scott Shafiroff said the task was tricky, but attainable. He prescribed his 598 Twisted as the solution. It's the newest crate engine from the longtime engine builder. The Twisted will simply bolt into your car without having to fabricate custom parts that people associate with most force-fed applications.
"A few years ago we began offering 598ci engines that use a low-deck block. It was a way to give our customers extra power, but stay away from the taller deck blocks that are used for the 632s," says the New York-based engine builder. He continues, "I know most people don't build a low-deck 598 because of piston and rod design issues, but SSRE has some tricks that make it a reliable and durable combination."
Scott doesn't want to divulge the secret in making 598ci from a low-deck engine, but let's just say that the fix involves a pretty savvy trick. SSRE works with Dart on a propriety block design that allows for a properly designed piston and correct connecting rod length. The ultimate advantage to a low-deck engine is that it will fit under the typical cowl induction hood on most muscle cars. SSRE's regular 598ci engine makes 775 hp and Scott said the new Twisted was going to make over 900. We dared him to put his money where his mouth is on this one, and we'd bring the pump gas. We put up a dollar for this gentleman's bet and it is a buck we'd be more than happy to fork over if the Twister cranked out 900 hp.
For those who don't know Scott, he is a former NHRA Pro Stock racer and Pro Mod engine builder who has been designing and building engines for over 40 years. His racing bullets have set records and won championships in all types of racing. The Ultra Street line, which is home to his pump gas combinations in both big- and small-block configurations, came about over 20 years ago as more customers began looking for his expertise in the street market. Today there are dozens of different small-block and big-block engines for sale through SSRE for both race and street applications. Each one is a proven package with the right combination of parts and professionally assembled.
Another nice feature is that SSRE dyno tests every single engine before leaving the shop and Ultra Street bullets come with a warranty. Scott likes to remind us that SSRE engines are engineered by them so you can simply bolt it in your car and go have fun later that day. The Twisted 598 was designed with the same premise of quality and performance.