Does anyone know the CFM rating of dual stock electric fans in a '88 Iroc 350 cid and A/C?

 

https://www.thirdgen.org/techbb2/sea...der=descending

 

That search link turned up nothing. GM never documented the cfm of the stock dual fans so any number you find is a guess.

 

Is there any way to find out. Looking into buying 2 more.

 

well i posted that search link cause there were a few post in there which were simular.. and most saying the same thing u said.. that no one really knows. however it is estimated to be around 2200 cfm total..

 

Well, I shouldn't have said it "turned up nothing" Breathment. It does bring up lots of information. The 2200 cfm is probably a combined dual fan rating (really a guess).

I don't believe that each fan can pull that kind of air alone. Even the BEST fans like the Spal dual 11" fans with a shroud only pull a combined cfm of 2780 with no resistance. Once a radiator is placed in front of it that number will drop. All fans are rated this way, unloaded. Still the Spal or BeCool fans (twins) will suck you pantleg in if you walk in front of the car. Show me a stock fan that will do that.

 

ya that 2200 was an estimate with both fans.. not each..

John did u do anythign to upgrade ur cooling system when you put the LT1 intake on? Im just curious because u said the BeCool fans are really good. And im eventualy going to want\need to upgrade my stock cooling system, especialy here in TX once i get my a\c working again, and if i get my engine rebuilt next summer..

 

I should start my stating I am running a 400+ HP 383 stroker with a 3000 rpm stall convertor. I have all the comforts to like A/C, it's not a stripped down race car but it does perform like one.

At first I left the cooling system stock. I ran hot with the TPI (230°F in heavy traffic with A/C running) and stayed the same with the LT1 intake.

Then I swapped to a Stewart water pump. It might have dropped the temp 5° F.

I then swapped to a universal Griffin radiator. It made the most improvement, I lost a good 20° F. in traffic. I don't ever go above 210° F anytime.

I have just got the Spal dual 11" fans. They are exactly the same as the BeCool dual fans. I will report back with any improvements.

 

John Millican

5 words

Hypertech fan switch from summit

Will turn on your primary fan at 195.

 

Ryan,

2 words

Custom Prom

In other words I can make my fans turn on at ANY temp I desire, and change it during the winter months.

 

LOL thats the expensive way.

 

lol, not if you do performance mods that require prom burning anyways, lol

 

I've been the hypercrap switch way before. See, I have lots of HP to keep cool. The Spal dual fans, Griffin radiator and Stewart water pump seems to handle it now. Of course I've lowered my fan turn on in the prom also. I have done lots of programming to make this monster run it's best.