Serpentine Clutch Fan: 7 or even 9 blades possible?

[ntsqd]

Discounting the flow restriction at the leading edges of the tubes (because all radiators of any core type will have this and it isn't affected by the number of rows), the flow restriction through each row of tubes is the same because they all have the same passageways for the air to flow through. Stacking another set of air passageways onto the rear of the core increases the flow resistance by at least that row's stand-alone flow resistance. But because of turbulence within the core, it is possible that another set of tubes will increase the resistance by more than it's stand-alone resistance.

I'm trying to say the same thing differently, but I don't think that I'm succeeding.

 

[Fordum]

I'm pretty sure its going to be turbulent flow. I don't think you can get laminar under those conditions.

But, for cooling purposes you want turbulent anyway. Although it increases flow resistance, it increases heat transfer.

Time to dig out Bernoulli's and a smoke generator.

I cannot prove this, I have nothing to compare. But from looking at radiators over the years, something in the back of my mind wants to tell me that some of the thicker ones had wider fin spacing.

 

[4xcrazy]

how fast you plan on driving ???

 

[Fordum]

I don't know about him, but my personal motto is: " Too fast is just a little too slow"

 

[azblazer]

Buddy of mine in delta runs the vortech fan on his 78 with tbi...direct bolt on.

 

[ntsqd]

Called my LAPS and got the most inexperienced counter person there. She couldn't find a listing for the ~97 Sub that made any sense. Said that is was listed as a 10" fan....
I had to explain that a 7.4L IS a 454......

sigh......

Either of the other two gals is far, far better at finding parts (& no, neither of them is all that hot). I think that I'll try it again, in person this time.

At 20" OD and factoring in shroud & shroud clearance I'm very close to the underside of the hood.