The Hayabusa V8 first appeared on The Kneeslider over two years ago and since that time, Radical Sports Cars has been racing their SR8 prototype, powered by the eight cylinder engine, quite successfully. It even holds the lap record at the Nurburgring. The 2.6 liter Powertec V8 engine, based on two Hayabusa cylinder heads joined to a purpose built crankcase, can put out as much as 380 horsepower at over 10,000 rpm, quite a little beast. Well, as engines often do, the little bruiser grew up.
The newest version of the Powertec engine now displaces 2.8 liters and delivers 455 horsepower. According to Radical, it's the most powerful small displacement racing engine available. Installed in the SR8LM, Radical says their car can now match the performance of a LeMans prototype around most circuits.
The Hayabusa based powerplant, which revs to 10,500 rpm, also delivers 250 foot pounds of torque in a compact package. In the SR8LM, it's matched to a paddle shifted 6 speed transaxle.
This little V8 is a beautifully engineered piece and builds on the very effective Hayabusa engine to turn out something that just seems perfect for interesting projects, like the DP1. I like it a lot.
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