Does anyone have any experience with how much these kits actually increase MPG?

http://cgi.ebay.com/ebaymotors/HUMME...VW#ht_2855wt_0

It doesn't seem like my stock fan would be robbing that much power, but I guess at 4$ per a small percentage would make a difference....

 

For $600 I don't think the gas savings would pay for the parts. I would buy them because you want a tad better performance and cooling not for gas savings. Your probably gonna gain 10 horsepower. $60 air intake kit on ebay is probably best bang for your buck if your looking to bump hp / gas milage. Of course along with the free things like: check your tire pressure every few weeks, take off roof racks, remove spare tire and carrier for 300 lb weight savings, etc etc

 

I would not expect an mpg increase.

 

I think it may give you a bit more HP but not too much better MPGs

 

Shouldn't increased HP mean more gas milage if you drive the same speed?

As in it takes less gas to create HP x and if HP x is the amount of power used to reach Speed y you would be using less gas to go Speed y?

I have no experience with motors but am just wondering if there's a difference....

 

It's worth doing.... but for $600 you could make your own kit out of summit... and still have cash left over for other mods..

 

I think you would be better off going with the Chevy one. At least you know it will fit and work with the H2 wiring.
FYI
2500 HD fan kit - Flexlite

listed as chevrolet parts:

shroud: GM 89023365


motor: GM 89023368 [need 2]
ACD 15-80551


Blade: GM 89023366 [need 2]
ACD 15-80682


if you need the connector: GM 88987983 [need 2]
ACD # PT1767
$481 with shipping
Nelson Performance wiring harness $100 w/shipping

from the www:
ELECTRIC FANS
A step beyond merely replacing the factory radiator fan is upgrading to an electric fan. Flex-A-Lite manufactures electric fans that push air through the radiator as well as fans that pull air through. Electric fans are activated when the water temperature reaches a pre-determined point. They can also be activated manually. The greatest advantage for running an electric fan is retaining horsepower. Because an electric fan operates independently from the engine rather than driven by it. When you look at the engine bay of many high-performance vehicles, you’ll notice the widespread acceptance of electric fans.

from various estimates ; 27 HP gain and 6% increase in MPG ( 1 MPG )

 

I saw Dyno numbers on a Ford Ranger of 24 hp....

 

It will run more efficient I dont think you will see a mpg difference, if you put a cold air intake on the truck, you are allowing more air, so you should in reality use more fuel. I think the best option is a programmer, they are around $300 and you can set your fuel trims and ratios.

 

makes sense