Pontiac Two Cylinder Tempest (circa 1961). Owned by: Danny Thompson. Pontiac created the four cylinder engine for its new compact car the Tempest in 1960 by cutting their 389 in half and using the right bank of a Pontiac V8. When Mickey Thompson went after National and international records he needed a Class F engine displacing between 61 and 91 cubic inches. He went Pontiac one better by cutting the Tempest four in half to create his twin. A 3/8″ aluminum plate sealed the end of the block and provided a base for the timing chain cover. A heavy duty cylinder head was cut in two and sealed with a similar plate. A 2-71 GMC blower and single Hilborn injector contributed to the output of 257 HP at 5,500 rpm.