So I installed dual electric fans last week and noticed a Huge difference in Mileage and power!!!
I have had my SR5 4x4 2000 tundra for 8 years and never saw decent mileage until this week! We drove from Mass to Penn. for a camping trip and loaded the whole truck with stuff. on the trip there I drove 60 - 65 with a light foot and made the 267 mile trip in 5 hours and only used 12.89 gallons all highway... you do the math 20.7!!! that's 3 more than I've EVER gotten from this truck.
on the way home I drove hard and stayed above 70 with the A/C on and still averaged 18.7!! there is hope
on the backroads I'm getting 17.5 on average driving normal
yeah i've done this on a few vehicles and noticed the same improvements. This is something I want to do to my Tundra in the future as well. Did you use a kit or did you put something together yourself?
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2004 Tundra: Scion T1808 head unit, JL Audio component speakers, True Flow intake, air box mod, JBA Headers, Bassani dual exhaust, 285/70/17 BFG All Terrain T/A, Toytec 2.5" lift with Rear Bilstein 5100s and AAL, Pro Comp Xtreme 8089s, leather seat conversion, custom Ranch Hand rear bumper.
This mod will allow you to take the fan off of the engine, and replace it with an electrical one. Doing this takes drag off of the engine and in turn gives you more horsepower and torque to the wheels.
So a basic install will involve removing the water pump pulley (with the OEM fan), unbolting the OEM fan, and then bolting the pulley back up to the water pump without the fan. Then you have room to install the electric fan. Flex-a-lite typically includes generic installation guidelines with their universal fans.
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2004 Tundra: Scion T1808 head unit, JL Audio component speakers, True Flow intake, air box mod, JBA Headers, Bassani dual exhaust, 285/70/17 BFG All Terrain T/A, Toytec 2.5" lift with Rear Bilstein 5100s and AAL, Pro Comp Xtreme 8089s, leather seat conversion, custom Ranch Hand rear bumper.
So I installed dual electric fans last week and noticed a Huge difference in Mileage and power!!!
I have had my SR5 4x4 2000 tundra for 8 years and never saw decent mileage until this week! We drove from Mass to Penn. for a camping trip and loaded the whole truck with stuff. on the trip there I drove 60 - 65 with a light foot and made the 267 mile trip in 5 hours and only used 12.89 gallons all highway... you do the math 20.7!!! that's 3 more than I've EVER gotten from this truck.
on the way home I drove hard and stayed above 70 with the A/C on and still averaged 18.7!! there is hope
on the backroads I'm getting 17.5 on average driving normal
I would like to hear from others with simular MPG improvements. It is hard to believe this could really help that much. I don't doubt you got what you said, just there could be other reasons. Anyone with long term results like this?
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03 Stratosphere Mica Stepside, 4.7 L, Supercharger, TRD Package, TRD Exhaust,
Scion Head Unit 08600-21802,
Custom leather heated seats 2 tone with TRD LOGO, Moonroof, ARE LID, ZR3 Laser Shifter, Denso IK22 .4mm Iridium Plugs, Scan Gauge 2,
Rhino Liner, Die Hard Platinum P5 battery 5.7 Killer
I've done this on a number of trucks. It does help. You take this big huge rotating mass that creates drag on the engine, and replace it with an electric fan that produces almost no increase in drag from the alternator...
Its one of the easiest way to bump HP and any respectable drag racer installs this mod...
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2004 Tundra: Scion T1808 head unit, JL Audio component speakers, True Flow intake, air box mod, JBA Headers, Bassani dual exhaust, 285/70/17 BFG All Terrain T/A, Toytec 2.5" lift with Rear Bilstein 5100s and AAL, Pro Comp Xtreme 8089s, leather seat conversion, custom Ranch Hand rear bumper.
if under driving the alternater works in little imports, then totally removing a pully seems to make sense.
The same belt works? Doesnt change the size?
How hard it is to get a waterpump out of a Tundra/
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06 DC 4wd
2.5" Front Lift via 5100 Bilstein's top notch
1" Diff Drop
17x9 Mojave Teflon
285/70/17 BFG AT KO
Snugtop Xtravision
I would like to hear from others with simular MPG improvements. It is hard to believe this could really help that much. I don't doubt you got what you said, just there could be other reasons. Anyone with long term results like this?
In your and my case, it will be a big thing due to SC
I've done this mod on my BMWs in the past and you definatelly can tell a difference. In the near future, I will definatelly will do this mod.
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2006 Toyota Sequoia Limited 4x4 w/ lxr package, 7008 navi, rear entartaiment system, 20" x-sp enkei.
2001 Toyota Tundra SR5 4x4 - TRD 9+Psi Supercharged, JBA Ceramic Headers, Walboro 255LPH Fuel Pump, 1UZ Rods, 20" x-sp enkei wheels, 7009 navi w/custom JBL wire harness + OEM XM/Sirus radio, drive by wire, and many other mods.
I did this and it's one of my favorite mods. I still get 2-3 mpg difference but nowhere near 20mpg. I stay in the 18mpg range. Also, you do not have to remove your water pump for this mod. In fact, I never even removed my belt during this mod.
In your and my case, it will be a big thing due to SC
I've done this mod on my BMWs in the past and you definatelly can tell a difference. In the near future, I will definatelly will do this mod.
Let me know when you do it. I would love to see your pictures. DH did a great job on his write up. Any idea why more people don't do this mod?
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03 Stratosphere Mica Stepside, 4.7 L, Supercharger, TRD Package, TRD Exhaust,
Scion Head Unit 08600-21802,
Custom leather heated seats 2 tone with TRD LOGO, Moonroof, ARE LID, ZR3 Laser Shifter, Denso IK22 .4mm Iridium Plugs, Scan Gauge 2,
Rhino Liner, Die Hard Platinum P5 battery 5.7 Killer
I did this with the Perma Cool "Cool-Pak II" for Tundra. You remove your stock fan and fan shroud, install the kit in the same holes the shroud was bolted to, attached the power cable, ground, and AC wire and you are done. That stock fan weights 35 lbs and really drags the engine down. I have since removed mine due to some problems I had with the unit I had. Customer support at Perma Cool was not very good, although I was assured that they were reorganizing to improve that.
I think I lost 7-10 HP and 3-4 MPG when I took it off, but the crap I had to listen to for installing something that almost toasted my truck has prevented me from trying this again. I was in the 18-20 MPG range, but now with a crapped out UNICHIP and the fan removed and different tire sizes, I'm around 13 MPG now.
I watched DH with his project and gave him some info that he may have used, so there are some threads here with all that in them. Do a search for electric fans and you should find them. Hope you find a good solution and good luck.
BJ
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2003 Tundra 4.7L V8 Access Cab Limited 4WD
w/ all factory packages,Black Onyx 202-rebadged. was stock 31K on 5/9/05, now 56K
*Extang Full-Tilt Tonneau * Bedrug*Topline Tailgate Step *Mr. Gille Upper & Lower Billet Grille *WAAG Bumper Guards, front & rear *HT Side Step Nerf Bars *AVS Hood Protector *WeatherTech Vent Shades *JDM Black Taillights *TurnSmart Solar-power Mirror Turn-Signals *Altec 48" Line-of-Fire LED Light Kit *Altec 53" Screamer Amber Side Marker LED *PIAA Backup/Work Lights * 35 % Tinting *BullyLED Third Brake/Cargo Light *
Interior:
*Gentex Auto Dimming Compass/Temp Rear View *Garmin's Nuvi 660 GPS * Scan Guage II *Passport SR7 Radar/laser shifter *
Wheels/Tires:
*Moto Metal M0951 Gloss Black 17 in. Alloys *SpiderTrax 1.25" Wheel Spacers * Goodyear Fortera TripleTred radials P275/60R17 *
Suspension:
*Bilstein HD Shocks, F&R *Hellwig Rear Sway Bar & Helper Springs *TCS Poly Steering Rack Bushings *Wheeler's Front Sway Bar Bushings *Timbren SES Kit, Front & Rear *
Brakes:
*TRD Big Brake Kit (front) *
BAD BONEZ BJ
Last edited by BAD BONEZ BJ; 06-25-2008 at 09:41 PM.
I watched DH with his project and gave him some info that he may have used, so there are some threads here with all that in them. Do a search for electric fans and you should find them. Hope you find a good solution and good luck.
BJ
I did use a lot of your info as it was most helpful in my initial design. I chose the fans, control modules and wiring design based on your recommendations. The only thing I've yet to do is, add flaps to allow more air flow through my shroud like the one you had from Perma-Cool.
I was waiting for the summer heat to hit to test my system before adding the flaps. The other day I towed my Jeep for an hour in 90 degree temps through stop and go traffic with no cooling issues.
Once the heat really hits and my set-up gets put through the ringer, I plan on sharing more info. Thus far it's flawless.
BTW, like the new name!
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2.5" SAW Coilovers, 1" AAL, Added Heated Seats, Under Drive Pulley, K&N drop filter, Electric Fans, 295/70-17 Nitto's, 1.75" Wheel Adapters, Rhino Liner, Under Coating, VSE w/Dynamat coating.
Electric Fans = Better Mileage
Re: Electric Fans = Better Mileage
a hybrid!
Linear Mode
