7 blade fan good upgrade?

[fleming442]

 

[pontiacgp]

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.
View attachment 118813

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

they need to weigh the blade fan vs and electric fan and then do a test to see how many hp it takes with the alternator powering the electric fan. that pulls the same cfm as the blade fan

 

[81cutlass]

Nothing like wondering if you are being followed by an airboat or if its just an early 00's Durango with a bad fan clutch!

WOAHHHHHHHFFFFFF!!!

The sweet sound 18 of the 107hp a Dodge 4.7 provides after 150k miles to move 2000 cfm of air at 2200rpm!

 

[TURNA]

Helicopter rotor assembly???

 

[MrSony]

Or 300 laptop fans

 

[pontiacgp]

 

[FluoFerret]

 

[pontiacgp]

4 pages and all the suggestions have been ignored..........

 

[olds307 and 403]

What year is this?????

Mechanical fan???????

His car is a 85, I believe. The fan, which All Star sells is a 4 blade non clutch fan that is standard equipment on my non A/C 70 Cutlass S. Briguy saw a 60 degree drop in temp.

 

[jim83]

Radiator is brand new. Champion. Engine is a Buick 350. Shroud is from a 307 cutlass. I had the stock 231 V6 fan, but it was bent. I got a fan off of a 229 v6, idk if it's factory. the blades dont have the little flipped up tips on the blades that the 231 fan does. Clutch is a thermal type, 2-3 years old. new 195* thermostat. newer water pump. new hoses.

You didn't read my suggestions- Is the Radiator a 2 or 3 row? you need a 3 row-made for a car with A/c, and for a v8? Also, why are you using a 221 v6 fan? There is a reason why GM doesn't have a one size fits all fan. If you got a radiator for a v6, it won't have enough surface area to reject the heat a 350 puts into it. Do you have a temp gun? if so, measure the temps at the water outlet and the top & bottom of the radiator.& report back. Do some basic trouble shooting, just don't throw parts at it. Lastly, what are you using for a temp gauge? The factory gauge is accurate if you take it out & clean the contact points where it attaches to the circuit board & properly tighten the nut. Not sure about the sender- do some research to see if the 350 sender is the same as the engine that came out of it, not physically, but the same part number.