Final Drive ratio, will a 3.25/1 be too steep ??

[36coupe]

What revs do flatheads like to cruise at?
Can they run at 3000rpm all day or is 2500 a better speed?
What’s redline on a stock flathead?
Not trying to hijack the thread but it is kind of relevant to the question.

[tubman]

Originally Posted by 36coupe

What revs do flatheads like to cruise at?
Can they run at 3000rpm all day or is 2500 a better speed?
What’s redline on a stock flathead?
Not trying to hijack the thread but it is kind of relevant to the question.

I find that anything over 2700 RPM and the engine seems to be "unhappy". 2300-2500 is optimum with a stock (Mercury 1CM) cam.