5spd GT "the 5.0 owns all" Founding Member Aug 7, 2002 9,516 6 99 Arkansas Jun 7, 2007 #41 Jun 7, 2007 #41 At 6,000 RPM the piston speed is 3400 feet per minute for the 347. At 6,000 RPM the piston speed is 3250 feet per minute for the 331. The difference between piston speed at 6,000 RPM between a 331 and 347 is .04411.
At 6,000 RPM the piston speed is 3400 feet per minute for the 347. At 6,000 RPM the piston speed is 3250 feet per minute for the 331. The difference between piston speed at 6,000 RPM between a 331 and 347 is .04411.