Fueling the HOT ROD Drift Truck Project
Powering a 1,200-hp turbocharged Coyote engine on E85 requires a lot of fuel. So much so that you can almost count it in dollars as it disappears through the downpipes. Making four-digit horsepower on a streetcar is especially difficult; large fuel pumps cycle the tank too fast, which leads to heating up the fuel and cavitation. When fuel boils in the tank, the only solution is to dump cool fuel from a gas station and continue driving. Boiling fuel and cavitation destroy fuel pumps.
On the other side of the spectrum are smaller, staged multi-pump fuel systems. The only considerable flaw with this route is if you fail one or more fuel pumps in the system, you might not know until you lean out and detonate the engine. There are work arounds to this that we will discuss in the story.
Aeromotive Trifekta Phantom In-Tank Kit
Aeromotive’s small-pump fuel systems were previously limited to their Phantom twin-pump system, which just wasn’t big enough for big, boosted E85 power. Luckily, they heard our cries and developed their triple pump system, dubbed the “Trifekta.” The Trifekta fuels the vehicle off a single, E85-friendly 450lph Walbro fuel pump for cruising. Two more 450lph fuel pumps are triggered electronically. The concept here is to reduce fuel cycling and in turn, reduce the amount of heat that can build up in the fuel system. Then when it’s time for all hell to break loose, the second two pumps come to life.
Racepak SmartWire System
Our auxiliary Walbro 450lph pumps will be controlled through a Racepak SmartWire system. The SmartWire can input all our Holley Dominator’s sensor data, coupled with Racepak’s own V-NET sensors, to provide all available engine data to the SmartWire. From there, conditional formatting, like “greater than” formulas can be created. For example, we can program the SmartWire with, “if boost pressure is greater than 2 psi, trigger secondary fuel pumps.” Conversely, we can build protection into the system if the engine were to lean out due to a pump failure. “If throttle is above 90 percent and air-fuel ratio is greater than 11.5:1 (talking gasoline terms), then” which would trigger a ground switch rev limiter on the Dominator, shut off boost control, and/or a variety of other perimeters. A second option is to build conditions from fuel pressure drop under boost. The conditions are limitless.
Mounting the Pump
Our Factory Five ’35 Truck Drift Rod utilizes a Fox body fuel tank design. Ford 2003-04 Cobra fuel tanks would also bolt-in, but the recessed center pump design simply wasn’t deep enough to accommodate the Trifekta. Our only solution was to mount the pump module in the back corner of the tank where there was enough depth. Aeromotive designed a pretty trick baffling system around the Trifekta. The outer foam baffle provides the first layer of protection and optional check valves (PN 18022) can be installed to further prevent fuel sloshing away from the pickups.
Installing the Trifekta System
The installation of the Trifekta is very similar to Aeromotive’s other Stealth systems: a hole in the tank is cut, mounting studs put in place, then the pump’s height set. The Trifekta requires between a 6 and 11-inch mounting depth. Triple -8AN ORB outlets feed into the fuel system’s plumbing. With everything in place, the Trifekta can support up to 1,650 EFI-backed flywheel-horsepower on E85.
1,200-hp E85 Fuel System Parts List for Fox Mustang Fuel Tanks
- 18311 Aeromotive Trifekta System
- 18022 – Aeromotive Baffle Check Valves
- 12339 Aeromotive 10 Micron Post Fuel Filter
- 13134 Aeromotive Extreme Flow 2-Port EFI Regulator
- 15633 Aeromotive 1/8 NPT Fuel Pressure Gauge
- 20-0433 Radium Auto Coyote Fuel Rails
- SS01 Glenn’s Performance Stainless Tank Straps
- TC01 Glenn’s Performance Gloss Black Fuel Tank Cover
- Variety of Russell ProClassic II E85 friendly fuel lines and fittings
Studs are installed into the tank and the overall installation is nearly identical to Aeromotive’s single and twin-pump systems. A 6- to 11-inch depth is required for the Trifekta triple pump system.
Optional PN 18022 check valves can be installed into the Trifekta’s bladder to help maintain fuel around the fuel pump pickups during cornering.
There’s a total of four -8AN ORB ports: one for the single (primary) pump feed, a single AUX port for the second and third pumps, return, and vent. One set of power and ground ports provide primary power to the main port, another for the second two, and a third set of ports for the fuel-level sending unit.
There’s plenty of clearance to our Factory Five Truck’s frame as the Trifekta sits lower than the factory fuel pump installation location, which has been capped.
Glenn’s Performance manufactures this slick, gloss-black fuel tank cover and stainless steel straps. The ’35 Truck is designed to use Fox-body straps and fuel cell.
Although the pumps house the pre-filters, an inline 10-micron (PN 12339) post-filter ensures our E85 will be as clean as possible before heading to the injectors. Twin -12AN ORB ports are adapted down to -10AN with our Russell fittings.
We’re a big fan of Radium Engineering’s Coyote fuel rails and have used them on multiple projects. These high-flow rails have provisions for their fuel pulse dampeners and auxiliary 1/8 NPT ports. Due to the clearance to our billet InnoV8 intake manifold, we weren’t able to use their on-rail dampeners.
When flowing this much fuel, dual feed and return lines are the best option. This means a single -10AN feed line Y-blocks into two -8AN rail feeds on the front. On the backside, the same happens for the return. We could have run two independent returns but thought merging them at the back of the firewall looked cleaner.
The Aeromotive 13134 two-port regulator is mounted on the firewall next to the engine along with our 15633 fuel-pressure gauge. A nickel-copper hardline was run to the intake manifold to provide 1:1 boost reference. This line also contains a gauge port adaptor for our MAP sensor.
Clean and ready to go! Our complete fuel system along with Russell ProClassic II line and fittings are ready to go.