EngineTurbo/SC 14.0L Inline-6
Power2,400 HP / 5,000 LB-FT
Curb Weight10,200 LBS
Last year at Pikes Peak, the professional stunt driver campaigned a Freightliner and set his seventh record; that time climbing to the top in 12 minutes and 38 seconds. This year, he is back with a big rig that is significantly quicker – and "significantly" just may be an understatement.
We caught up with Ryan at Southern California's Irwindale Speedway late last week as he was putting his latest creation through shakedown testing for this week's event. When he offered us a ride, we had no hesitation.
- The Pikes Peak Freightliner is nothing like its cross-country load-hauling cousins. Rather, it is a purpose-built beast featuring a custom aluminum-rail frame and carbon-fiber and fiberglass body panels. Even so, it weighs a whopping 10,200 pounds wet.
- Power comes by the way of a turbocharged 14.0-liter inline-six Detroit Series 60 marine diesel. The seven-foot long engine makes 825 horsepower in stock form, but the team at Gale Banks Engineering have fitted it with an 8.3-liter supercharger in addition to a 110-mm turbocharger (Banks calls it a "Super-Turbo"). But that wasn't all, as the guys also added a methanol injection system to improve combustion and an intercooler spray system to reduce the intake temperatures. The modified engine, sitting a foot lower and six feet further rearward than stock, now delivers 2,400 horsepower and 5,000 pound-feet of torque – while burning No. 2 pump diesel fuel!
- The transmission is a five-speed road racing automatic sending its power rearward to a Detroit locker limited-slip differential (permanently locked, so the rear wheels always scrub). The steering rack is from Howe Performance, designed for a Baja Trophy Truck, while the tires are custom-compound sticky racing rubber molded by Michelin to look like stock truck tires.
- In addition to the 12-gallon diesel tank, there are five other tanks of fluid including 14 gallons of water/methanol for the engine, 7 gallons of water for the intercooler spray and 14 gallons of water to fog the brake rotors for additional cooling – yes, the brakes are water cooled.
- Climbing into the cab requires a bit of gymnastic ability, and the seating position is startlingly high off the ground if you're not used to a big rig. Ryan faces a thin plastic steering wheel and a custom aluminum dash chock full of temperature/pressure gauges and switches. Primary instrumentation is a Racepack digital cluster. The transmission control lever, and a separate handbrake just for the rear wheels, sits high between the two bucket seats.
- The blown diesel engine is startling loud, even at idle, and full throttle (redline is 2,700 rpm) sends it into a whining frenzy. Despite its prodigious power output (weight to horsepower ratio of 4.25:1), acceleration is strong rather than truly brisk. Nevertheless, the two rear wheels have a very difficult time maintaining traction. The throttle response is slightly delayed as the boost builds, but once everything is pressurized, nothing holds it back. Shifting through the gears is surprisingly smooth, mainly because the rear tires had trouble maintaining contact with the track. The throttle response reminds me of a powerful off-shore power boat – a slight delay followed by incredibly strong thrust.
- Oddly enough, especially after looking at the pictures, the truck doesn't feel top heavy or unstable. However, Ryan would later run me around the oval at high speed, and the Freightliner fought all of the steering inputs as he attempted directional changes (the locked rear axle caused plenty of scrub/understeer on the front tires). His solution was to break the rear tires free, set the five-ton truck adrift and then point the nose in his desired direction.
- I found myself hanging on to the cage with white knuckles as the semi floated on self-made molten rubber sliding sideways around the track (scroll down to watch the video). Thick, acrid smoke filled the cabin, making it hard to see, and I was thrown hard against my five-point harness straps (the most violent maneuvers were side-to-side as the tires gained and lost grip as the surface changed). It was crazy fun, but I constantly reminded myself that I was a passenger on a very safe and contained track. Doing the same thing on the treacherous Pikes Peak circuit, with sheer cliffs on each side, feels like it's bordering on lunacy.