7 blade fan good upgrade?

[olds307 and 403]

A fixed fan basically exes out any performance gain you may have realized by putting a 403 in your car to begin with.

Could put an auxiliary electric fan on the front. Use a heavy duty switch to control the relay and source the power from a circuit that's only on with the ignition so if you forget to turn it off then it won't matter.

Can keep a fan that has some concession to economy/performance and give it that little extra cooling capacity when needed without reverting to 1890s technology.

So it draws 50 hp and 75 ft/lbs of torque?

 

[Turbolq4]

Cooling Fan Shoot-Out! - Engine Masters Ep. 20

This time on engine masters, you are going to find out which horsepower killer is our biggest fan. (Metal clattering) (dramatic music) (engine revving) this is engine masters, presented by amsoil and sponsored by mr. Gasket and earls vapor guard hose.

www.read-videos.com

 

[pagrunt]

Cooling Fan Shoot-Out! - Engine Masters Ep. 20

This time on engine masters, you are going to find out which horsepower killer is our biggest fan. (Metal clattering) (dramatic music) (engine revving) this is engine masters, presented by amsoil and sponsored by mr. Gasket and earls vapor guard hose.

www.read-videos.com

No good on the video, can't get it to play.

 

[olds307 and 403]

My understanding for a solid fan, the GM copy doesn't draw that much power.

 

[MrSony]

My understanding for a solid fan, the GM copy doesn't draw that much power.

In engine dyno testing, it was a lot of power it sapped. it may cool the best, but this isn't the 1940s. pretend it's the 1980s. I do all the time.

 

[MrSony]

Rewatched that video, a standard 350 sbc (center bolt valve covers, aluminum heads, intake, headers, small cam, etc) that makes 408ftlbs at 3900, and 349hp at 5200. It gave up 8ftlbs and 14hp with an 18" 6 blade clutch fan. Ain't gonna miss that, nor feel it.
As said, the worst fan they tested was an 18" 6 blade solid fan. killed 20ftlbs and 30.4hp.

Let it be known, they tested the fans with a shroud and in front of a radiator.

This pic was with the clutch fan, but it shows their setup the best.

 

[pontiacgp]

 

[olds307 and 403]

In engine dyno testing, it was a lot of power it sapped. it may cool the best, but this isn't the 1940s. pretend it's the 1980s. I do all the time.

What did that 4 blade draw, can't see the video? Then why not go electric, that started in the 80's. That is what makes my 260 so powerful, we are talking almost 307 power with the serpentine belt, electric fans and tuned exhaust.

 

[MrSony]

What did that 4 blade draw, can't see the video? Then why not go electric, that started in the 80's. That is what makes my 260 so powerful, we are talking almost 307 power with the serpentine belt, electric fans and tuned exhaust.

For fairness, all the fans in the test were 18" six blades.

 

[olds307 and 403]

For fairness, all the fans in the test were 18" six blades.

This fixed fan is supposed to draw less than other fixed fans and move a lot of air. I want to say it draws similar power to the 6 or 7 blade clutch fan. I believe people have dynoed it, dirt track guys use them a lot, I believe as they are reliable and little can go wrong with them. Just like how much hp is drawn by 40 amp electric fans? Anything less just doesn't cut it for cooling.