180 at stoplights? lol.
I call bs. no BS! That would take 7000rpm and a 2.45 rear and and something like 20% overdrive. Not to mention a really special engine :)
Now I'll grant you the your engine is special, and even that you might have the overdrive. But I surely doubt you would ever put a 2.45 in the back of any YR-owned car,lol. Well if you did, at least you wouldn't have the wind to deal with.......Surely you jest,lol
On another note........
Even if you shroud the whole thing, the electric fan mostly draws through a ring directly under the perimeter of the blades to maybe 50/60% back to the center. The center is more or less dead and that area outside of where the blades are, tends to not move at all,or even go backwards when stopped. So do the math on that. Suppose that fan is 16inches in diameter.That would make about 150 net sq inches of radiator exposed to the fan's airflo, or less than 1/3 of the gross available finned area, of say over 500sq inches I'd guess.
So now let's put it into gear.
Suppose that you had fully shrouded that fan. Now you expect ram air to drive thru the full face of the rad and exit out a 16 inch round hole of 200 sq inches,or 40% of the gross rad area.
Some 60% of that air,after it passes thru the rad,within say 1.5 inches, has to make a 90* turn and smash into whatever air column is trying to go supersonic, thru the fan. I just don't see that happening.
So to me a full shroud on just 1 fan is not a good idea. I would want that 60% bypass working for me.
So for me, I would never install electrics. Especially since a mechanical fan is so easy, and just flat-out works.
And there's plenty of other better reasons to not use electrics for a streeter, especially on a big engine sucking underhood heated air.I mean think about it: How far do you think you could run on a 200 or 300 or 400 degree day, compared to say just 68,lol.Do you think your body could get rid of that heat? Of course not; that's a dumb question.
And IMO, so is not ducting fresh cool air into any engine, nevermind a 408 streeter.
OP; I'm not calling you personally,dumb! The hot air intake is dumb. There is no way to control the AFR running like that. And if the AFR ain't right, then neither is the timing. So what you end up with is an impossible-to-tune engine.And a well-tuned 367 comes along and spanks you. Man that would suck! Unless of course the the entire car was in that 200,or 300,or 400 degree environment,lol, then I guess you might theoretically be able to tune it.
And on another note;
OP;How long do you expect your cooling system to hang together with a 24 psi cap?!