ORIGINAL: puchinator
i am in the process of becoming ASE certified, so i know some stuff. second, the RBinnovations "supercharger" is just a forced air system. a real supercharger/turbo speeds up both the fuel/air mix, not just the air. notice in the attached picture, the RBInnovations supercharger has only air passing through it.
You need more schooling.
You have two different turbo/supercharger set ups when using a carburetor.
One of which is a “blow through” system where the turbo/supercharger is mounted before the carb and uses a tube and bonnet or (hat) that mounts to the top of the carb itself (Typical of turbo’s and centrifugal superchargers). The biggest problem with “blow throughs” is a carburetor doesn’t understand pressure and doesn’t respond very well. The pressurized intake manifold is doing squat until the piston goes down stroke to allow air to pass through the carb. The power gain comes for increased cylinder pressure, it is up to you, the technician to tune and compensate with more fuel. The “blower” doesn’t do it.
The second of which is a “draw through” system. Like the ones you see on TV when watching drag racing. Since the carb only response the air passing through the venturi’s, these are much easier to tune. There are also “draw through” systems where the carb mounts before the inlet on turbo’s and centrifugal superchargers but most “draw throughs” applications are roots and screw type blowers. The air/fuel is not “sped up”. The intake manifold is pressurized. Upon the intake valve opening, the cylinder too becomes pressurized thus adding more power. The fuel is just thrown into the mix. Again, the amount of fuel is determined by the metering of the carb predetermined by the “tuner”.
On an injected or fuel injected application, there is no “draw through” or “blow through”. The supercharger/turbo only pressurizes the intake and cylinders. Fuel amounts are regulated and determined by electronic means (computer) and in some cases mechanically.
The same applies for diesels. Whether it be yesterdays mechanical injection pumps and injectors or today’s high tech computer controlled pumps and injectors, the turbo’s in which they are fitted, has no direct control over and fuel additions. The pressure added is monitored and compensated for by other mean.
Pressure, that’s what it’s all about.