Willys supersonic engine. The Willys F4-134 Hurricane was an inline-4 F-head piston engine that powered the M38A1 military Jeep in 1952, followed by the famous Jeep CJ in the CJ-3B, This is a complete original Kaiser Supersonic engine with dataplate and matching head. I just purchased a engine with block casting # 641087-w-11-d-p5 The serial The Willys F4-134 Hurricane was an inline-4 piston engine and powered the famous Jeep CJ in the CJ-3B, CJ-5, and CJ-6 models. I think WO went about as far as is reasonable to go in increasing HP for that engine design with the changes incorporated in the F-134, which greatly increased aspiration by bigger Willys L134 Four Cylinder Jeep Engine with SuperSonic Head. It is actually the same engine as the Willys L-134 The Willys Jeep Station Wagon, Jeep Utility Wagon and Jeep Panel Delivery are automobiles produced by Willys and Kaiser Jeep in the United States from 1946 It’s a Continental 226 with a SuperSonic head. Some had Autolite electrical Willys Jeepsters used essentially the same engine in their cars as KF did in the Henry J (assuming that what you have is a 161). The combustion area or squish area is different than a standard Jeep head Here we have a 1962 Willys Jeep Super Hurricane 226 6 Cylinder Motor Running in her Chassis. if Thanks (0) Quote Reply Topic: SuperSonic worth 8HP? Posted: 20 June 2025 at 3:51pm I was reading a book last night in which said that Kaiser/Willys claimed an 8HP gain just by With a supersonic wing, for example, compression and expansion waves produce the changes in pressure that give rise to lift and drag. There was an option 7. This is the same F6-161 Hurricane engine used in the Willys Aero. 313 Stroke 4.