Chuck Sea/Tac
Well-known member
My car with 19" tire and 3:78 rear end ratio is turning 2628 rpm at 60 mph.thats 400 rpm over the optimum rpm listed by ford. Why you want to " over rev " for extended periods , I don't understand. I drive 50 a lot, and 20% of my 32,000 miles on this engine is at 55. It just seems happier at 50 or below. Anyone know what the piston speed is at this high. rpm?
PS. My 6.0 YMCA will go 200,000 to 300,000 miles. Guess what? 90% is 2000 rpm. Plus it's not an un balanced 4 cylinder.
PS. My 6.0 YMCA will go 200,000 to 300,000 miles. Guess what? 90% is 2000 rpm. Plus it's not an un balanced 4 cylinder.