My 340 is about the same, 175-180 cranking PSI.
And for the record I never said a mechanical fan can’t work. I just said it’s less efficient.
Like I said before, I’ve got no problem with mechanical fans. I just hate all the guys that say electric fans can’t work because they set up a lousy system because they have no idea what they’re doing. They work great if you use the right fans and set up the system properly.
Yeah that test won’t tell you if you’re moving enough air to keep your engine cool. It takes VERY little airflow to stick a piece of paper to your radiator.
Now if your fan can’t even do that it definitely won’t cool your engine. But just because it can hold a piece of paper on the radiator doesn’t mean it will keep your engine cool by any stretch of the imagination.
What would tell you is the CFM rating for the fan, which is readily available for most electric fans and should be available in a cfm vs rpm graph for any mechanical fan worth the effort.
