Exactly. But, it also makes the engine way more efficient. You get more power put out per stroke of the cylinder than the same engine NA.

 

Yamhaha is right.....but...when im under boost my milage i crappo........however on the highway at low rpms i get INSANE gas milage........even thou the turbo is not BOOSTING the engine, its basically injecting the air so the engine doesnt need to suck it in.

 

huh... thats interesting.

 

i make better gas mileage when i just drive my Si. 35 mpg.

 

Yea well im getting near 50 mpg on the highway.

 

The VE goes way up because your stuffing more air into the cylinders.... But that is the whole point of FI.

Warmer air atomizes gas better, so mileage is know to go up.

 

Agent, there's gotta be something up with your car. I couldn't get 20mpg if I tried. Have you tried replacing the oxygen sensor?

The numbers from the supercharger are quite impressive, I must say. My best was 46mpg, but I was babying my car like a half-broken egg. I usually get 35-39mpg going 70-80 on mostly freeway driving.

 

Well, I finally did the math... I got about 35-36mpg driving pretty hard over a 242 mile period. 50% of driving was at 80mph+, 45% was a TON of 3rd gear pulls on a 2-lane 55mph highway. and the rest was city driving.


I should mention that my car is back to stock witht he execption of an SRI.

 

Interesting thread!

Hotter air will vaporize fuel better, providing greater fuel burn effeciency. Could hotter air be provided by simpler means than a turbocharger that isnot doing much other than providing air at ambient pressure? Exhaust manifold heat exchanger? How about boosting the fuel temperature directly, before the injectors? Combination of both maybe?Fuel vaporizing techniques have been around since the 30's (the Pogue carb for example using white gas, which was patented, its history/ validity still a bit of a mystery). With 4 dollar gas staring us in the face methinks this may well be worth pursuing.

I have a 95 coupe salvage rebuild under way, and really want to experiment with some of this....

northwoods

 

Very interesting theory. The problem I see with it is that the improved gas mileage is aproduct of warmer intake temperatures in conjunction with the compressed air provided by the supercharger. Think about mcguyvering a small electronic supercharger if you want to test your theory.