So however reads this I apologize for that one special individual that ruins other people's threads.
I can speak for myself. When you post on a public site it's usual to expect comments - even ones that don't fit into your opinion. If you can't handle that then I suggest associating with people who only agree with you.
If you check back on the posts you'll find you were the one who opened the discussion about people saying efans don't work. Since I have been part of those posts I clarified to say it's not that some people don't believe they work, but how much of a benefit they provide. Somehow that's viewed as blasphemy and sets off unreasoned responses. It's difficult to maintain any discussion with posters who are hyper sensitive and ultra defensive about being asked to verify claims - which by the way, may prove their own points.
As well there's nothing about being a "scientist" with trying to get accurate results. I don't know how much of your own opinions are about accepting face value statements of others, but I'll bet you, especially being from the "Show Me" state, don't accept much without some proof.
One more clarification. My use of the term 'Boy" was an exclamation not a derisive term. I could just have easily used "Wow", which would have been a better choice given that written posts can't convey inflection and when dealing with people having hair trigger defensiveness.
If you get anything from this, I hope that you realize that if you get the proper oem fan off an engine of similar size or larger that will cool your engine just fine.
That's an incomplete assumption and could lead to improper fan selection - if I can chance ruining this thread again. Fan design is not just about diameter. It's also about pitch angle and surface area and blade design and rpm. If fact no one knows the OEM fan CFM, which would make choosing the correct aftermarket at lot easier. So it's a bit of a guessing game also given that fan design is coupled with rad design to provide the correct cooling. You need to know the correct CFM. Clutch fans also are variable rpm while efans are mostly single speed, except that some can be duel fixed speed, or with more expensive controllers, have some variability.
Assessing conversions (responding to posts) is also about cost/benefit, getting it right with as little experimentation and risk as possible, and the increased potential of something going wrong given that efans have more components that could fail.