v belt tightness

[93Ford]

How tight are the v belts supposed to be. I tightened them until they were just barley flopping around while running. With engine off theres maybe a 1/4in of play with about 5-8 lbs of force applied.

[ORCoaster]

I would say that is good.  When they warm up they will slack some and maybe give you 1/2 an inch of defliction and that I think is what you want.