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Old 08-27-2007, 11:58 PM   #11
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phantomcow2 -

It's all so jumbled together. I think the following :

HAI - Hot Air Intake, which depends on what kind of car you have.
New LRR Tires, one size up - I did a GPS based test that showed my odometer to be 2% less. Because I use my odometer, I document a 2% increase in my gaslog.

(hopefully near) Future : 5th gear swap in my manual tranny.

CarloSW2
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Old 08-28-2007, 07:47 AM   #12
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Electric fans, good for 2MPG and a lot more top end power. Reason, reduced engine drag, 90 percent of the time the fan isn't even needed but a mechanical fan will still be beating the air to death.
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Old 08-28-2007, 04:31 PM   #13
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Quote:
Originally Posted by Telco View Post
Electric fans, good for 2MPG and a lot more top end power. Reason, reduced engine drag, 90 percent of the time the fan isn't even needed but a mechanical fan will still be beating the air to death.
this si true, you only need a fan when your not moving at all. highway speeds you dont need it.
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Old 08-28-2007, 05:05 PM   #14
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Old 08-28-2007, 05:10 PM   #15
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Quote:
Originally Posted by Telco View Post
Electric fans, good for 2MPG and a lot more top end power. Reason, reduced engine drag, 90 percent of the time the fan isn't even needed but a mechanical fan will still be beating the air to death.
I would agree with your statement, however I have not realized any gains in my fuel economy after removing my bolted on fan (not even clutch driven).

Could be other factors involved.

On that note I don't know that I can say one thing has increased my economy other than using pulse and glide. I have tried removing my fan, put in a grill block, but the biggest thing seems to be simply how I drive. Maybe I need to spend some more time messing around. Maybe my car has too many variables with it's mechanical ignition and carburetor to accurately see the difference between different mods.
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Old 08-28-2007, 06:54 PM   #16
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well you wont see much of a mpg gain by taking off, putting on a fan if you have a v8, it already has plenty of power to spare. my truck has a whopping 92 hp 4 banger... every little resistance that the engine has to over come helps and its noticeable.
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Old 08-29-2007, 05:16 AM   #17
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Quote:
Originally Posted by Fourthbean View Post
I would agree with your statement, however I have not realized any gains in my fuel economy after removing my bolted on fan (not even clutch driven).

Could be other factors involved.

On that note I don't know that I can say one thing has increased my economy other than using pulse and glide. I have tried removing my fan, put in a grill block, but the biggest thing seems to be simply how I drive. Maybe I need to spend some more time messing around. Maybe my car has too many variables with it's mechanical ignition and carburetor to accurately see the difference between different mods.
I had a '65 Belair with 250 6 & auto that got around 25 mpg...no mods. I drove it pretty easy though.

Things that might work?

http://www.eagle-research.com/fuelsav/ecarb.html

http://fueleconomytips.com/2005/11/0...one-generator/

http://fueleconomytips.com/2007/04/2...thods/#more-72

Vacuum gauge?

PCV jar?

E3 or Halo plugs?

a quote....

"Alright you guys, I realize that I'm and old fart but I experimented with
magnets and carbureted engines 25 years ago. I got fantastic results. I used a
1980 GMC 4X4. It had a 350CI with an auto trans. Obviously not a gas saver. I
hooked up a 1 quart container to the fuel pump. I carefully measured the
distance while trying to conserve fuel. I added 1 cow magnet and increased the
distance by 6 blocks. Added 2 magnets and added more distance. With 3 magnets
all faced the same direction I got an extra mile. I still don't know what
effected the gasoline but it works."

Assuming 15 mpg highway....this works out to 19 mpg ...or a 26% gain.

Cow magnets are a different type than the typical neo magnet...S pole should be placed towards the engine...same as fuel flow direction.
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Old 08-29-2007, 05:31 AM   #18
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Originally Posted by Telco View Post
Electric fans, good for 2MPG and a lot more top end power. Reason, reduced engine drag, 90 percent of the time the fan isn't even needed but a mechanical fan will still be beating the air to death.
Maybe around town, but on the highway the fan is trying to pull air at maybe ~50 MPH, but since your car is moving ~65 your fan is not pulling (and might even be resisting airflow a tad).

If you take a fan and put it on a free-spinning bearing, then try to spin it by hand, you'll realize that it doesn't take a whole lotta energy to accelerate the fan when you are going down the dragstrip either. In fact for the dragstrip a mech fan is more efficient because it doesn't tax your electrical system so your alternator doesn't get bogged down. One of the lightweight flex fans is a good compromise.

The fan in my Saturn SL2 has been broken for two months now, and I've driven just fine without it (~98% highway driving) and I can even run the air conditioning on the hottest days. A fan is really only needed in a traffic jam.

-Bob C.
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Old 08-29-2007, 05:47 AM   #19
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I had a '65 Belair with 250 6 & auto that got around 25 mpg...no mods. I drove it pretty easy though.
Was that auto the 2 speed powerglide? Maybe I do have something else wrong with my engine if I could only get 18 "driving it easy".

Quote:
well you wont see much of a mpg gain by taking off, putting on a fan if you have a v8, it already has plenty of power to spare. my truck has a whopping 92 hp 4 banger... every little resistance that the engine has to over come helps and its noticeable.
I have a 140 horsepower (or their abouts) engine pulling a 2 ton vehicle, so the power to weight ratio is a tad better with mine but I thought I would notice it. Maybe driving mostly highway is the difference like what bobc455 was saying.

Quote:
Maybe around town, but on the highway the fan is trying to pull air at maybe ~50 MPH, but since your car is moving ~65 your fan is not pulling (and might even be resisting airflow a tad).
BTW, do you have a replacement engine in your s10? I was looking for curb weight of your vehicle and kept seeing 118 horsepower for the 1995 model. Maybe my brain is still dead .

Have a great day all!
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Old 11-18-2010, 01:24 PM   #20
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Re: Your most effective FE inspired modification

traded 6cyl vehicle for 4cyl vehicle.
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