Can I go with a forced induction system, with a reduced ratio and pick up 20-40% more hosepower?

I was thinking if I could keep my low end power strong and keeping the lower rpm would also create great milage.
Can I go with a forced induction system, with a reduced ratio and pick up 20-40% more hosepower?
doesn't it depend on the engine and type of vehicle?
Can I go with a forced induction system, with a reduced ratio and pick up 20-40% more hosepower?
unfortunately, more power requires one thing, MORE FUEL, you can not find a STRONG car that produces good fuel economy. mine has 375 horses, and gets about 18 mpg, if i floor it about 13. ( no i am not driving it at this point.)
Reply:Volumetric efficiency in internal combustion engine design refers to the efficiency with which the engine can move the charge into and out of the cylinders. More correctly, volumetric efficiency is a ratio (or percentage) of what volume of fuel and air actually enters the cylinder during induction to the actual capacity of the cylinder under static conditions. Therefore, those engines that can create higher induction manifold pressures - above ambient - will have efficiencies greater than 100%. Volumetric efficiencies can be improved in a number of ways, but most notably the size of the valve openings compared to the volume of the cylinder and streamlining the ports. Engines with higher volumetric efficiency will generally be able to run at higher speeds (commonly measured in RPM) and produce more overall power due to less parasitic power loss moving air in and out of the engine





Volumetric efficiencies above 100% can be reached by using forced induction





in other words..yes..even with a lower compression ratio youll still be filling your cylinders more efficiently to produce more power. and youll feel safe pushing more boost without worrying bout blowing stuff up





im not sure on power gains..that all depends on tuning and the motor design itself.





i get extremely good gas mileage on my vw. 10 psi boost with a head spacer. injectors and a tuned ecm and a 260 cam








good luck
Reply:increased power is always fun but in the case of increasing fuel mileage it would help most if it reduced the number of times the transmission needed to shift down a gear or two from point a-b. if the horsepower/torque increase of your engine is going to be at "real world" engine speeds (low-mid-range) you can see an increase in fuel mileage.