Master list of 65+ proven mods for increasing MPG

[PaulB2]

Pardon the newb question, but if a warm air intake is a good idea, why do cars with turbos have intercoolers? Should we do a partial block of intercoolers to raise the charge temp? I understand the need to reduce the risk of detonation...

[Christ]

A turbo can quickly reach 1300°... Hot.

Put a temp sensor in the intake stream before and after the intercooler, and you'll see why its there. For low boost, they're not always necessary.

[Formula413]

Originally Posted by Christ

A turbo can quickly reach 1300°... Hot.

Put a temp sensor in the intake stream before and after the intercooler, and you'll see why its there. For low boost, they're not always necessary.

What he said. Boost creates a LOT of heat. Air gets hot when you compress it. Naturally aspirated cars are not heating the incoming air in any way, except possibly a small amount of heat soak in the intake tubing under the hood.

[oil pan 4]

Originally Posted by Formula413

What he said. Boost creates a LOT of heat. Air gets hot when you compress it. Naturally aspirated cars are not heating the incoming air in any way, except possibly a small amount of heat soak in the intake tubing under the hood.

The only people I know that widely use a non-intercooled turbo are the 6.5L chevy diesel guys. I have read posts where they say 160-180'F is a normal IAT for them when rolling down the highway. A few have seen IATs peak at 300'F on hot days while towing on a hill climb.

Also I noticed the wiki had barely been up dated in the last 6 months, until I got ahold of it.

[gone-ot]

...when air is compressed, it rises in temperature, so 100ºF incoming air (before the turbo or compressor) can exit at much HIGHER (10X) temperature.

...the purpose of the "intercooler" it to remove as much of that "increased" air temperature as possible before the air is "stuffed" into the cylinders.

[oil pan 4]

In a diesel you want to get as much air mass stuffed into the cylinder as possible to run efficiently at any speed.
That is why I plan to run an intercooler and water injection on my diesel.
Water injection will be my next wiki after the articles printed in this months in "dieselpower magazine" become free for viewing on the internet. That one article is going to be my main "external link".

[1337]

From the "65+ Efficiency Mods" page:

Originally Posted by MetroMPG

Synthetic transmission/differential oil
Reduces friction between gears leading to less energy being absorbed as heat into the oil. Also increases parts life. Again, most effective for vehicles in cold climates, since the viscosity of conventional lubricants increases as ambient temperature drops.

There are a few threads that discuss synthetic or lower-weight transmission oil. Has anyone experimented with thinner oil in the differential of a RWD car?

[rdtony]

I have; I every case, I found it made the vehicle quieter and in my informal coastdown tests it showed an improvement in mileage.

[FastTrack]

Great Compilation!

[drmiller100]

super stock drag racers run ATF in their rear differential. It EATS bearings and ring and pinions.

5-30 engine oil is the minimum I would run, and I sure would not run even that if I were towing with the vehicle.