From the article:

Oh, to be Jay Leno. The late-night-television mogul is known for lots of things, but perhaps his most interesting trait is his undying interest in cool cars, trucks and motorcycles. Unlike a number of classic car aficionados, Jay colors his vehicular leanings with a green tint, and that desire to be at least somewhat environmentally friendly stretches to awesome machinery like his one-of-a-kind EcoJet.

Surely you remember the EcoJet. Based loosely on the bones of a Chevrolet Corvette, the silver bullet gets its name from the Honeywell LT101 jet turbine engine lurking within, a powerplant that pushes out 750 horsepower and 700 ft-lb of torque at 48,000 rpm while running on biodiesel. Those formidable ponies are sent to the rear wheels through a four-speed automatic transmission sourced from General Motors.

Perhaps the coolest bit of all is that Leno actually drives the EcoJet. In fact, the comedian was recently spotted at the All GM Show in Van Nuys, California. Fortunately for us, the boys from ConcoursBlog were present at the show with video recorders on hand, and they've decided to share the goods with the rest of the class. Want to see for yourself? Check out the video after the break.

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It's actually a Lycoming LTS101. Honeywell purchased Lycoming. The engine has been around for years, used mostly as a helicopter engine. It is a free turbine design consisting of a 2 stage axi/centif compressor for a pressure ratio of about 8:1. The gas generator turbine is a single stage axial and the power turbine is also a single stage axial turbine. SfC is about .55 lb/hp-hr (25% cycle efficiency).

The Lycoming design is unlike most of Honeywell's turbines (aka Garrett Turbines) in that the compressor is axi/centrif. Garrett compressor designs rarely if ever paired axial and centrif. usually centrif, centrif or multi stage axial.

Another interesting difference between Lycoming and Garrett turboshafts are that the Garrett engines were usually single shaft, constant speed engines as opposed to Lycoming's free turbine design.

Full article and video here:

A cutaway of the engine can be found here (scroll down):