[Dragncar]

What are they worth on a dyno ? I have a electric fan but not sure if I want to use it on the 461.
I have the fan and a V pump but thinking about going with a normal fan and header E vac for the little engine and saving the electric fan and V pump for the 540 IA2 engine.
Time reasons as much as anything. April will be here quick and I would like to make the first race. I might gyno the 461 if I can swing it.

[Steve C.]

Related.....

https://forums.maxperformanceinc.com...=electric+fans


.

[Half-Inch Stud]

Primary purpose for Elec Fan is Reliability, not HP or better/worse cooling comparisons.

I cracked-out an Iron Waterpump on the Highway during a 2-3 upshift.
In-town Chevy guy launceh his Mech fan through hid hood at Maple Grove at the Tree.

Since then, no biggie Mech fan, and primary cooling is passive through the Radiator, with the electric fan used during peak heating (lights, Summer highway, long idling).

[twooldgoats]

Originally Posted by Dragncar

........I might gyno the 461 if I can swing it.

What does than involve, exactly????


Jim

[AG]

Originally Posted by twooldgoats

What does than involve, exactly????


Jim

A doctor.

[Mike Davis]

Originally Posted by twooldgoats

What does than involve, exactly????


Jim

Something fishy!

[TheGrudge]

Something to do with inspecting a bore?

[firechickenman]

Engine Masters had an episode where they tested belt driven fan hp loss on a dyno. They tested on a 350 hp (with no fan) SBC and the best fan was an OE clutch fan that killed 14 hp at 5200 rpm. I would assume hp loss would be greater on an engine turning higher rpm.

[Half-Inch Stud]

14 HP of drag during acceleration is asking for a broken water pump, pulley, or lunching the fan loose.

[TheGrudge]

A friend with a very consistent bracket car cycles elec pump & fan between rounds to control temps -( I’m sure he’s not the only one) he swears by it.

[Dragncar]

Originally Posted by TheGrudge

A friend with a very consistent bracket car cycles elec pump & fan between rounds to control temps -( I’m sure he’s not the only one) he swears by it.

Its something for me to think about. There have been several days where I made it deep in Super Pro and Pro. Finals in both once or twice with the car getting little time to cool down. Just stopped off to get a little gas and back to the line.
But I think I would need a generator running in my pit to do it. I would like to avoid that if possible. There are a couple pits that have electricity right there but my pit is the first one form the starting line right on the rail. Its great for family and friends watching and hanging out.

[Scott Stoneburg]

Originally Posted by Dragncar

Its something for me to think about. There have been several days where I made it deep in Super Pro and Pro. Finals in both once or twice with the car getting little time to cool down. Just stopped off to get a little gas and back to the line.
But I think I would need a generator running in my pit to do it. I would like to avoid that if possible. There are a couple pits that have electricity right there but my pit is the first one form the starting line right on the rail. Its great for family and friends watching and hanging out.

I doubt you would need a generator as long as you run an alternator. I use an electric water pump and fans between rounds. Run the fans a couple minutes between passes and its good. Only an issue when I walked away and forgot to turn off. 25 minutes later I needed a jump start..lol..

[Dragncar]

Originally Posted by Scott Stoneburg

I doubt you would need a generator as long as you run an alternator. I use an electric water pump and fans between rounds. Run the fans a couple minutes between passes and its good. Only an issue when I walked away and forgot to turn off. 25 minutes later I needed a jump start..lol..

I run a little 36 amp alternator. Heck, the car even still has a power steering pump. 10s.
The pump went bad so I don't run it anymore but I did try it with the belt on and off back when it worked , no ET or MPH difference in my case.

[AIR RAM]

On average I have seen a gain of 10-12HP GAIN when removing the clutch fan and installing an E-Fan. However its difficult to beat the reliability of a clutch fan... in the end you have to decide how bad you really need that 10-12HP gain... I personally just like the cleaner look with an e-fan so I do it more for looks than the power gain.

With all that said, I have been really considering using a clutch fan on my current 496 build... reliable street ability is priority on this build.

SPEED SAFE, NICK

[Dragncar]

Originally Posted by AIR RAM

On average I have seen a gain of 10-12HP GAIN when removing the clutch fan and installing an E-Fan. However its difficult to beat the reliability of a clutch fan... in the end you have to decide how bad you really need that 10-12HP gain... I personally just like the cleaner look with an e-fan so I do it more for looks than the power gain.

With all that said, I have been really considering using a clutch fan on my current 496 build... reliable street ability is priority on this build.

SPEED SAFE, NICK

The fan I have used for years is one of those cheap solid plastic ones. They weigh nothing, have a 8K limit which I will never see and cool great.

[firechickenman]

Originally Posted by Dragncar

The fan I have used for years is one of those cheap solid plastic ones. They weigh nothing, have a 8K limit which I will never see and cool great.

If it's one like this, it cost 25 hp at 5100 rpm in the Engine Masters test.

https://www.summitracing.com/parts/f...oaAj1AEALw_wcB

[Dragncar]

Originally Posted by firechickenman

If it's one like this, it cost 25 hp at 5100 rpm in the Engine Masters test.

https://www.summitracing.com/parts/f...oaAj1AEALw_wcB

That is the one, looks like a electric fan would take me from 10.83 down to 10.75 or so. Its a bracket car so I don't care about a little power loss, as long as it is consistent and stays cool. I never throw belts and get by with a puny alternator and it cools great.
What are some good clutch fans suitable for racing ? 18"

[firechickenman]

Originally Posted by Dragncar

That is the one, looks like a electric fan would take me from 10.83 down to 10.75 or so. Its a bracket car so I don't care about a little power loss, as long as it is consistent and stays cool. I never throw belts and get by with a puny alternator and it cools great.
What are some good clutch fans suitable for racing ? 18"

I've been running an OE fan with Hayden thermal clutch for the last 6 seasons without issue. That said, I think a clutch fan is probably the least consistent fan type. Coolant and ambient temps can change how much it is engaged and that would change the HP it takes to drive it. A fixed fan will take more HP to drive it, but it will be the same every time. I think electric would be the most consistent with the ability to control engine temps better than either of the two belt driven designs. Electric is also the safest fan for racing. Not much chance of it coming apart and sending parts flying.

[Half-Inch Stud]

Ahh yea, the time when the clutch fan locks while your accelerating, nothing like it.

Went through 3 clutch fans that each locked-up solid when failed. Na, nope, no more.

[69MaizBird]

E fans are a no brainer. No way I'd risk a fan at 7300. Also with an e water pump it cools in the pits very efficiently without bumping the motor to circulate water. There are very few autos that use mechanical fans these days and it is because it is more reliable and efficient to run electric.