Stock Radiator Fan CFM?

07 Boss

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IMO the best thing to do in your situation is increase coolant flow when you need it the most. This can be achieved through a Meziere water pump. I run my Whipple car in the Las Vegas heat all summer in shitty traffic. My needle, granted it's not a coolant but cyl head temp, never reaches the middle of the gauge where it used to sit stock. I can sit in 120+ degree ambient temp, with the AC on full blast, and it won't budge. I've even seen the gauge go down, sitting idling in the staging lanes at the track.

Think about it, when do you need the most flow from your coolant? When you are sitting still and there is no air flow. So with a mechanical pump, it is flowing it's lowest volume when you need it the most. A Meziere will flow at max capacity all of the time, 24/7. Too many advantages, and no disadvantages to running an electric pump. I've run them on just about every race car I've owned in the last 30+ years.

Advantages:
*Max flow 24/7
*Less parasitic loss from the belt
*You can drive it home without overheating if you lose the belt (depending on how long your battery lasts running the ignition).

Disadvantages:
*None that I can think of.
 

Dino Dino Bambino

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Disadvantages:
*None that I can think of.

I can think of two.

1. The price.
2. If the EWP fails you won't be driving the car home.

That said, EWPs are very reliable nowadays and the advantages outweigh the higher cost. I live in a scorching hot desert climate and my next water pump will definitely be a Meziere.
 

07 Boss

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I can think of two.

1. The price.
2. If the EWP fails you won't be driving the car home.

That said, EWPs are very reliable nowadays and the advantages outweigh the higher cost. I live in a scorching hot desert climate and my next water pump will definitely be a Meziere.

Well yeah, cost can be an issue, but aren't all but a few upgrades expensive for our cars? Especially when you want them to go as fast as we do. I mean I spend $600+ for TWO rear tires every 8K-10K miles. Not to mention what I spend on race wheels and tires. You gotta pay to play.

Granted I've had more mechanical pumps than electric but I've had bunches of mechanicals fail and only one electric (and that was due to my brilliant wiring). A failure of either a mechanical or electric pump is going to leave you stranded. My current one has been on the car for over 50K miles. Call me weird but I toss my old mechanical, along with a spare alternator, in the trunk when I go on a decently long road trip. Been stranded on road trips by these things in the past and it's more for peace of mind.

I'm not one to tell people what to do, but this is one of mods that I suggest to everyone every chance I get.
 

SUHleen

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I guess I should have provided more details in my first post, but all I was wondering is the stock radiator fan CFM. I already have a Meizere electric water pump and I have a big Meizere intercooler pump. Supercharger coolant feels cold compared to engine coolant. Temp gauge in the dash is never higher than a tick below half, which is good, but to the touch it feels hot as hell compared to the S/C coolant. I have a laser thermal temp gauge I'll have to get that out today. Been working on getting my BMW back on the road

Edit: I did not mean for that first part to come off sounding like a jackass, just FYI if anyone reads it that way. It's too early and its monday lol
 
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Timmbo

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One thing I've neglected to read here is that if your running headers....get them wrapped! That will bring down under hood temps considerably.
 

SUHleen

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One thing I've neglected to read here is that if your running headers....get them wrapped! That will bring down under hood temps considerably.

Good point. I am running headers and they are not wrapped. I have decided not to do anything with the headers yet until I decide if I am staying S/C or going turbo. But you are correct, they do create a lot of heat.

Stock fan and shroud is around 2000-2200 cfm.

Thank you. I'm looking at a dual fan setup with shroud that moves about 3750 cfm so that should help quite a bit between runs.
 

Makdaddy

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My experiance was terrible
I went with the E Bay aluminum twin 12 inch fan setup
ran hot, Upgraded to twin FFDynamics 3000 RPM Dual Ball Bearing fans, Still issues
Went with GT500 fan and a 170 T stat
All issues gone
The small Radiators on our cars need a lot of air flow to maintain proper coolant temps
So small things like under and over cowling along with a good shroud to pull the air into the fan are what makes the system efficient. So even tho I went with the High Dollar Twin FFDynamics fan.
The overall design of the shroudless Aluminum plate and the the smaller foot print of the 2 fans vs one 16 in fan was poorly efficient.
Also when you drop the engine temp the underhood temps will follow
 

SUHleen

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My experiance was terrible
I went with the E Bay aluminum twin 12 inch fan setup
ran hot, Upgraded to twin FFDynamics 3000 RPM Dual Ball Bearing fans, Still issues
Went with GT500 fan and a 170 T stat
All issues gone
The small Radiators on our cars need a lot of air flow to maintain proper coolant temps
So small things like under and over cowling along with a good shroud to pull the air into the fan are what makes the system efficient. So even tho I went with the High Dollar Twin FFDynamics fan.
The overall design of the shroudless Aluminum plate and the the smaller foot print of the 2 fans vs one 16 in fan was poorly efficient.
Also when you drop the engine temp the underhood temps will follow

What style GT500 fan are people putting on the 3v? I think I'll try that and a different thermostat
 

SUHleen

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Cool I appreciate the help man. I'm trying to decide between the GT500 fan or a stainless shroud with a FF 3600 CFM fan that is plug and play. Both about the same price I just want to make sure I buy the better option lol
 

702GT

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Cool I appreciate the help man. I'm trying to decide between the GT500 fan or a stainless shroud with a FF 3600 CFM fan that is plug and play. Both about the same price I just want to make sure I buy the better option lol

IMO no one makes a better/quieter fan than our OEM's. For Procharger and Turbo kits, we can be out of luck when it comes to using OEM stuff though. Even the GT500 fan isn't near as slim as a sheet metal shroud with a slim fan. But I can tell you from my experience with the Procharger slim fan/shroud, that piece of shit fan is so fucking loud that I'll pay $1000 for a premium custom fab GT500 fan, and when that Procharger fan comes out, I'm taking a 12 gauge and a can of gasoline to it. Then I'm gonna mail it back to ATI/Prochargers door with a "TRY HARDER" note.
 

Makdaddy

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Save the time and aggravation
I went thru all of it.
Learn from my mistakes
Buy the frickin GT500 Fan and be Happy

Oh and that Stainless shroud. How deep is it????
Ill bet its flat
That means it wont work worth a Shit

But hey I appreciate the fact that we all have to learn at our own pace
 

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