There’s an arm’s race going on out there as racers, Mustang shops, and manufacturers are gearing up for an all-out war in the newly formed DiabloSport Coyote Modified category. As of this writing a tire has yet to be officially turned in this Coyote 5.0L powered eliminator, but the war is scheduled to breakout this March during the 2014 season opening event dubbed the Spring Break Shootout (Bradenton Motorsports Park, March 6-9). The proverbial line in the sand has been carved out between nitrous, supercharger, and turbocharged combinations. It is a class designed for street type power adders but little else in way of engine modification with the power adder ultimately deciding the potential of the popular next generation 5.0L.
One company that has been following this class since its formal announcement last summer is Blow-By Racing. The popular Florida-based speed shop is well versed in just about everything Mustang from the Fox-body craze to the modern magic of the Coyote 5.0L powerplant. As the rules became more solid and specific, so did Blow-By Racing’s decision to put a shop-backed racecar in the class. The company is resurrecting its former heads-up superstar, a 1988 Mustang LX coupe that saw action in Fun Ford Weekend’s Street Warrior category. The rolling chassis was dusted off for another tour of duty in the fierce small-tire wars of Ford drag racing. The drivetrain for Coyote Modified will be totally different but the true stock suspension and SFI-certified roll cage are perfect for the new project.
The Fox-body provided a solid foundation for eight-second runs and it was time to decide which power-adder would top a heavily massaged Coyote 5.0L powerplant. We’ve heard all sorts of wild accusations and assumptions over the past six months with regards to the power potential for boost and nitrous. A few have taken the plunge into the centrifugal blower ranks while others have looked seriously at the 67mm turbo and the positive displacement packages. As the boosted combinations gain in popularity on the street, a NMRA imposed minimum weight of 2,900 pounds for nitrous entries in Coyote Modified has several racers eying up that package for competition. Chris Jones of Blow-By Racing explained his reason for the lightweight chemically enhanced horsepower, “we liked the weight break for nitrous combos and also the fact there are zero restrictions—no jet size limits, no spec solenoid sizing—pretty much run two stages.”
Blow-By Racing leveraged its relationship with Nitrous Express for its Coyote Modified combination. The two companies have collaborated on many projects including the shop’s Reaper nitrous package (see side-bar). A Boss 302 intake manifold was shipped off to the skunk works department at Nitrous Express in Texas. Nitrous Express isn’t just a manufacturer of nitrous systems and components as the company runs a custom shop for projects just like this one. We’ve seen plenty of nitrous racers in NMRA competition with custom Nitrous Express setups, including Outlaw badass Sam Vincent. The plan called for the nitrous-oxide scientists to add two stages using two direct-port nitrous systems. A direct-port system features a nozzle in each intake runner to deliver nitrous (and fuel in a wet system) to each cylinder. The BBR intake manifold received two nozzles in each runner since the team decided two stages of nitrous allows them to control the power due to the tire and suspension limitations.
Adding two sets of nozzles to the Boss 302 intake is not a simple task, this isn’t some sheetmetal intake for a big-block Pro Mod engine—it is a compact intake manifold designed to fit under a stock hood with short-runners and box plenum so the high-tech V-8 could spin easily to 8.000 rpm or more. The Boss 302 intake is one of three manifolds legal for Coyote Modified—the OEM, Boss 302, and Cobra Jet. The mad scientists at Nitrous Express examined the intake to figure out the best course of action to fit two complete direct-ports on the intake manifold. Jones shipped the intake with the Aeromotive fuel rails in place so there were no surprises when it comes time to bolt the intake on the engine.
Ryan Lewis of Nitrous Express explained the tight confines in this application, “the primary stage was little more difficult due to the intake runners having stiffening ridges on the outside of the runner which limited nozzle placement.” The fuel injectors and rails also forced the outer set of nozzles to be installed high in the runner. He continued, “the second stage, which was installed on the underside of the intake, was actually very straightforward. The space between the two banks was tight so we utilized a crisscross plumbing pattern (solenoids on one side and nozzles on the other), which allowed us to keep the lines as short as possible while minimizing the amount of bends in the hard tubing.” It was a tight fit but the finished product looks clean and intimidating.
There a few factors that weighed in on the Nitrous Express tune-up (which wasn’t available for print, FYI). The first is that both systems are wet meaning that both nitrous and fuel are sprayed into the runners. The second fact about the Blow-By Racing combination is that Jones will be relying on a Big Stuff 3 stand-alone EFI. He is keeping both the engine and the nitrous tuning separate. “Going with the wet system seemed like the safer route. Right now we know we can add two wet kits and run the Big Stuff 3 without any problems. We plan on switching to a dry system once there are more options on the market for the Coyote engine.” We asked Lewis if there were any concerns about combining the low-pressure wet nitrous system and the high-pressure EFI injectors. He responded, “there is no problem feeding the nitrous system with low fuel pressure. All Nitrous Express nozzles are designed to shear the fuel discharge with the nitrous discharge. This shearing effect results in a completely homogenized nitrous and fuel charge, which results in the greatest power gains possible.” He also added that Nitrous Express offers dry nitrous systems for those who prefer that route.
As the arms race continues to ramp up, the racers are planning the war to begin shortly after you read this issue. Blow-By Racing has certainly sent a message that they are loaded up with a few stages of nitrous and ready to hang the wheels in this eight-second slugfest.
For more info of on this setup or anything else in the Blow-By Racing line up, call 561.417.5555.