Here's the caption that goes with the photo. Hot Rod just had an article about a junkyard LS that they turbo'ed to about 26 psi of boost on the stock bottom end and reciprocating assembly. Stock cast crank and pistons. They wrung out about 1300 horsepower from 4.8 liters. It survived 60 pulls on the dyno and kept going. Remember that the Motus is based on the LS. I've seen a few references to the V-4 as a racing engine for four wheel vehicles. It's be a great dirt track or formula car engine.