What fan/radiator with a V8? (1 Viewer)

[chicago]

SOOOO this is GREAT info here I had not seen before.
If I may....
Not many people are running the Stock Mech. clutch and fan!?!?
How can this be? Im not understanding WHY? If it were matched with the stock motor, how could it be so in effective?
Ive got a 5.3 vortec I was planning on running the stock fan with a Griffen 19x24 al. rad. However, I had also gotten a taurus fan sitting on the side line too.
The taurus would be less work than the mech., but I thought the Mech. fan would be more durable for the long run.

Any additional thoughts/ insight you all can share?

 

[VETTE60]

I have been running the summit aluminum rad with a black magic elec fan for 6 years now and I like the set up. better than trying to mate with a mech fan, and you can turn it off for deep water. cools the engine great, saves a bit of power.

 

[chicago]

So it would seem then that wiring in an E fan is a better option than using the Mech. fan?
Do you run a temp control?
How about a manual switch?

I haven't started on the fan stuff YET, so Im not SOLD on the mech fan.

Just like to know more about it! May end up using it....
Work wise...the e fan would be a TON easier to install than trying to make the mech fan. I MAY have to get creative with the hoses to clear the mech. fan the way it sits and or modify the stock rad. brackets on the 40.

 

[Mace]

So it would seem then that wiring in an E fan is a better option than using the Mech. fan?
Do you run a temp control?
How about a manual switch?

I haven't started on the fan stuff YET, so Im not SOLD on the mech fan.

Just like to know more about it! May end up using it....
Work wise...the e fan would be a TON easier to install than trying to make the mech fan. I MAY have to get creative with the hoses to clear the mech. fan the way it sits and or modify the stock rad. brackets on the 40.

No, adding the electrical fan is much less efficient than a mechanical fan.

the only reason to run an Electrical fan is because you have no other option.

 

[Bret]

I have since swapped out my MKVIII for a 7 blade clutch fan with shroud. Works very well.

 

[TURNMEOVER]

So does anyone run a stock fan with a shroud and clutch??

Not for long, it just doesn't cut it.

I have been running stock 4 core radiator(new from radiator barn)
and the stock fan and clutch for several years here in Fla during 100 deg ambient temps. never had a problem. and never gets over 200 deg.
It also depends on the motor mine is a stock 93 tbi 350.

 

['74 UA FJ]

No, adding the electrical fan is much less efficient than a mechanical fan.

the only reason to run an Electrical fan is because you have no other option.

I guess it depends on your engine and setup. My motor runs at 180-190 deg F in the head with my taurus fan and 195 deg thermostat. Sometimes gets up to 200 while pounding on a hill in the summertime.

I'm sure it would run just the same with a mechanical fan with a proper shroud. The taurus is just easy to set up.

 

[Elbert]

The stock GM fan clutch and matching fan is the best solution if space permits. I've been running dual electric fans from ford contour...due to space limitations. I'm planning to run fan and clutch that match by 99 GM 5.7. (single belt drive fan and accesories).

As noted on teh old school GM V-8 with v-belt you might consider a 7 blade fan from a cadillac or even off a 78 Camaro.

In my case I have a issue with the distance between the water pump and the radiator core.

Common solutions...ford v-6 contour dual electric fans, lincolin Mark VIII fan, SPAL fans, Crown Vic fan.

As stated I'm going back to GM fan and make necessary mods for clearance. Will also install large pusher fan in front onf condensor to use when required and when A/C is on.

 

[Mace]

I guess it depends on your engine and setup. My motor runs at 180-190 deg F in the head with my taurus fan and 195 deg thermostat. Sometimes gets up to 200 while pounding on a hill in the summertime.

I'm sure it would run just the same with a mechanical fan with a proper shroud. The taurus is just easy to set up.

It does not depend on your setup. The electric fan is not as good as moving air.

It all depends on if the area you drive around in stays cool enough for you to get away with it, and what Radiator you are using.

 

[chicago]

Alright...
That makes more sense to me then. So its more of a space restraint more so than the E fan is BETTER than the Mech. fan. I just couldnt imagine that the stock set up would be inferior to an elec. set up.
When we set the motor, we allowed clearance for the mech. fan. The taurus fan is not a space savings. The dimensions were basically the same as the stock mech. fan.

The motor is a garden variety 5.3L vortec...no mods, just stock.

Thanks for the info gents.

 

[shelfboy1]

never used an electric fan ,but they didnt have electric cooling fans when i started putting v8s in 40s and never had an issue .climate could have something to do with that .

 

['74 UA FJ]

It does not depend on your setup. The electric fan is not as good as moving air.

It all depends on if the area you drive around in stays cool enough for you to get away with it, and what Radiator you are using.

Four-core rad from rocky mountain cruisers.....it's probably over 5 years old now. I wheel in the summers in Alabama.....90+ degrees.

What really helps me out is that I have a little larger than stock camshaft which keeps cylinder pressure lower at low rpms than a stock camshaft does.

 

[Mace]

What really helps me out is that I have a little larger than stock camshaft which keeps cylinder pressure lower at low rpms than a stock camshaft does.

huh????

 

[Elbert]

GM Fan clutch fan and clutch

see pics of GM fan clutch and fan from 1999 GM 5.7 (Truck / SUV) I plan to use.

Personally I don't think the camshaft will play much of a role with an increase in cooling capacity or temp issues from the engine.

If anything...in my mind... a stock camshaft with stock engine would be the "coolest" engine to run.

 

[brokenparts]

I suppose I can follow the logic of a bigger camshaft being cooler.... more duration = less cylinder pressure = less compression = less efficiency = less heat but you would have to base that on a low compression ratio motor.

 

[fj40charles]

No, adding the electrical fan is much less efficient than a mechanical fan.

the only reason to run an Electrical fan is because you have no other option.

I run a stock mechanical fan on my TBI 350 with a Griffin radiator. It will pull plenty of air when using a fan shroud. I consider this to be much more reliable than an electric fan. I don't care about the loss of HP running the mechanical fan.

Only time the electric fan is more desirable for me is deep water crossings.

 

[Eskimo]

Holy back from the dead thread...

Who is this M and M guy anyway?

 

[chicago]

see pics of GM fan clutch and fan from 1999 GM 5.7 (Truck / SUV) I plan to use.

Personally I don't think the camshaft will play much of a role with an increase in cooling capacity or temp issues from the engine.

If anything...in my mind... a stock camshaft with stock engine would be the "coolest" engine to run.

Where'd you get THAT!?
Brand new stuff?
Would that be a universal type fit across the Gen III vortecs?

Pretty cool!

 

['74 UA FJ]

huh????

I suppose I can follow the logic of a bigger camshaft being cooler.... more duration = less cylinder pressure = less compression = less efficiency = less heat but you would have to base that on a low compression ratio motor.

Brokenparts understands......

Take 2 identical engines, put a stock cam in one, and a cam with more duration in the other, and you will have less cylinder pressure with the oversized cam.

 

[Mace]

Brokenparts understands......

Take 2 identical engines, put a stock cam in one, and a cam with more duration in the other, and you will have less cylinder pressure with the oversized cam.

Till you step on the gas...


more Hp = More heat.

In a VERY small set of circumstances I can see your point. But not once you open the butterflies..