supercharger

[PSJanis]

Thinkin of buying a supercharger...wanted to know what % increase in HP could be expected, and also if it could increase my mileage at all. The car is a 1998 Land Rover with a 4.0L V8 (182 HP)

[Weapon_R]

A supercharger will increase power, but it will reduce gas mileage by nearly half.

[lastprodigy]

4L V8 with 180hp??? are we back in the '80's

[PSJanis]

Originally posted by lastprodigy
4L V8 with 180hp??? are we back in the '80's

lol i dont think so...it's Fuel Injected. The reason its so low is that it has (and needs) torque. it has somewhere around 220 ft-lbs. of torque. But yeah...that low power is one reason i was lookin at supercharging this thing.

[PrezeS_PL]

Friend wants to turbocharge his discovery, he's looking for someone to build him manifold.

[RickDaTuner]

Originally posted by PSJanis
Thinkin of buying a supercharger...wanted to know what % increase in HP could be expected, and also if it could increase my mileage at all. The car is a 1998 Land Rover with a 4.0L V8 (182 HP)

well it is said by some that 1 psi of boost is equal to a 10hp gain, and since you rover is a V8 it more than likely running somewhere in the region of a 10:1 piston compression ratio, which in theory would allow any where between 8-10psi worth of boost, with out major modifications... which would in theory of course result in a 80-100hp gain on your car.

As was stated earlier though your fuel economy would go Down quite a bit, and also take into consideration that it is not as easy as just having some shop install a super charger. You also need to consider the added strain on the fuel system which in most cases requires aftermarket computers and components to allow your newly boosted engine to run reliably.

With that being said, there is also the issue of reduced reliability over a long period of time, boosting N/A engine will reduce the life of the engine considerably.

in some cases it is better to sell your current Vehicle and just find something that has more Grunt.

[sleeperstang93]

With the right kit and a good tune you can expect +5% power for every pound of boost and still operate witin 80-90% of your stock fuel economy (while driving normally of course)...just a rule of thumb though..