MPG. I need some more Brains to help me out. - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rooster's82 · 04-04-2008, 08:25 PM

Quote:

Originally Posted by babyJay

You would need to eliminate the factory shroud. It's not needed.

but that fan has enough power to keep my engine cool? Would i have to make a new shroud or just pop the new one in there with no shroud?

babyJay · 04-04-2008, 09:30 PM

http://www.electricfanengineering.com/over-the.htm Has some info you might find useful.

piecesparts · 04-05-2008, 03:23 AM

Quote:

Originally Posted by Rooster's82

how much better is a duel fan setup to a single "universal" electric fan that fits in the factory shroud? Will it draw enough air? For example:http://www.jcwhitney.com/autoparts/P...001645/c-10101

The setup that I purchased and used on both of my trucks is the SPAL dual 11" fans with their own shrouds. Summit Racing has them listed under the "BeCool" fans in their catalog. I spent some time with the guys from "BeCool" a few years ago and learned how SPAL calculates their airflow and how they compared to other brands. I collaborated this with the people that own the Flex-a-Lite company, also met them on a little cruise trip. The SPAL people do their flowrates in a "DYNAMIC" test and the others seem to do theirs in a "STATIC" format. The dynamic being with a pressure behind the fan (such as you would have under your hood) and the static being tested with just a standard atmospheric pressure behind the fan. My two fans flow 2800 scfm with a backpressure on them and it works real well.

I mounted my fans up close to my radiators, by using aluminum strapping from my local hardware store and the fans stand up to just about anything that I do. The extra room in the engine bay is also a big plus. (the stock fan shroud is tossed). I control them so that only one turns on, unless the temps go high, then the second cycles on to support the first. I have yet to get to the second fan and use it.

Rooster's82 · 04-05-2008, 04:01 PM

Rock and roll.

dieselarmy13 · 04-05-2008, 04:41 PM

Here's a link on how to install a late-model jeep fan into your factory shroud. This is for install on a 67-72, but the shroud openings should be similar. The fan itself only runs about $70. In a follow up, one member reported gaining 3mpg with a 250L6! This is defenetly on my to-do list!
http://67-72chevytrucks.com/vboard/s...d.php?t=254617

04-04-2008, 09:30 PM	#27
babyJay Arrived on a Pale Horse Join Date: Mar 2007 Location: SnagTown Indiana Posts: 2,524	Re: MPG. I need some more Brains to help me out. http://www.electricfanengineering.com/over-the.htm Has some info you might find useful. __________________ Jason 87 V30 350TBI/400 White w/Boss V-plow 89 R3500 CC SRW

04-05-2008, 04:01 PM	#29
Rooster's82 Registered User Join Date: Mar 2008 Location: Clearwater FL Posts: 271	Re: MPG. I need some more Brains to help me out. Rock and roll. __________________ JG If you can't find it at the junk yard you don't need it.

04-05-2008, 04:41 PM	#30
dieselarmy13 Phone's ringin Dude. Join Date: Mar 2007 Location: Colorado Springs Posts: 1,426	Re: MPG. I need some more Brains to help me out. Here's a link on how to install a late-model jeep fan into your factory shroud. This is for install on a 67-72, but the shroud openings should be similar. The fan itself only runs about $70. In a follow up, one member reported gaining 3mpg with a 250L6! This is defenetly on my to-do list! http://67-72chevytrucks.com/vboard/s...d.php?t=254617 __________________ I pitty the fool with only two headlights!! 2003 SILVERADO SS--THE NEW GIRL 1972 GMC--THE OLD GIRL



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