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This is a discussion on Mileage increase with efans within the Performance forums, part of the General Discussion category; I'm thinking about taking that parasite off my 02 Z-71 and getting a set of the Flex-a-Lite Efans. How much ...
I'm thinking about taking that parasite off my 02 Z-71 and getting a set of the Flex-a-Lite Efans. How much of a mileage increase should I expect? I've heard they give you about 15 hp and close to 1 mile/gallon. Power and mileage, can't beat that.
Are you gonna a double fan or a single?
**My Little Roots Rocka**
Flex-a-Lite makes a double 15" fan kit for the NBS. That's the one i was looking at. They run about $400 total.
I didn't notice much a difference on mine. You'd have to have a pretty significant increase in mileage to make up the $400.
I got about .5 mpg.
91 C1500 TBI 355 Ported TBI, Helix spacer, EPP Chip, 3.73's and Eaton, Hedman headers and 3" Exhaust, Vette servo Best run 15.211@87.57
http://www.elmnet.net/~lange_c/c1500.html
I would(and will) go with a set of LS1 fans off of ebay. You can prolly pick them up at 1/4 the cost of the dual set up from flexalite.
Just my .02
the power loss from the fan can range from 5-15hp.
the fuel to make that is very little, like one said.. probably 0-maybe 1mpg.
but other items are gained as the A/C will be colder at low speeds (0-20mph).
engine will run cooler on a properly tuned temperature cycle... so the engine
will run a bit better.
airdeano
2001 Silverado 4.8L 4-spd Automatic 3.42
? horsepower
? torque
will find out soon!
1965 C10 5.3L (SSR) TH4L60e
(It's Alive! 07/04 It Drives! 03/05 Daily Driver XX/08!)
I put a Flex-a-Lite electric fan on my V6 Toyota Tacoma. It was the biggest waste of money I ever put into that truck. You'd think that an e-fan would make a noticeable difference on a V6, but it didn't do all that much. I maybe picked up .5 - 1 mpg. Like someone else said -- you'd be a long time making your money back on that.
2004 | RCSB | 5.3 | Dark Metallic Grey
The only time you see a difference with e-fans that you can feel, is when the engine is cold and at high rpms.
When the engine is cold it takes it longer to warm up and the viscous fluid in the engine fan is cold so the fan turns with the engine. With the proper set up on e-fans they will not spin until the engine warms up which it will do a little quicker.
At higher rpms, say 3500 to 6000+ the engine fan takes hp from the engine. (The fluid coupling does not let the engine fan completely freewheel.)
So if you operate your engine at high rpms all the time you will notice a big dirrerence.
Diamond Jim
98 Burb, 5.7L, 2500LS, 4X4; 80 GMC 383, ½, Long bed; 74 Dually Flatbed 350; 73 Short bed 350 4X4; 41 Chevy Master Deluxe, 327/375hp Rochester FI; 89 Fleetwood Bounder, 2 ton Chevy Chassis, 454/TH425
how do you control the electric fans?
03 Silverado
Go Faster:6.0 Lq9
Dont stop: 4x4, Built 4L65E, Terragrappelers, Ford Keys, Locker, Offroad lights, 23 hwy mpg!
Add some Flare: Helo Maxx 6, brush guard, Kenwood deck & speakers
The best way is with a thermostat for most aftermarket kits. Sometimes if you use a set of fans off of a vette/camoro/etc, you can have the pcm control it like it does on the factory instaled ones.Originally Posted by treyZ28
Diamond Jim
98 Burb, 5.7L, 2500LS, 4X4; 80 GMC 383, ½, Long bed; 74 Dually Flatbed 350; 73 Short bed 350 4X4; 41 Chevy Master Deluxe, 327/375hp Rochester FI; 89 Fleetwood Bounder, 2 ton Chevy Chassis, 454/TH425
read the internet
pretty nioce bang for the buck,think ill look into some
I start my new job with a company that does powertrain cooling for a bunch of GM vehciles on monday. Hopefully I'll be able to get a new set of E-fans cheap.
03 Silverado
Go Faster:
Dont stop: 4x4, Built 4L65E, Terragrappelers, Ford Keys, Locker, Offroad lights, 23 hwy mpg!
Add some Flare: Helo Maxx 6, brush guard, Kenwood deck & speakers
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