Stage-2 MAF Part# 212
To address the needs of vehicles with screw and roots style superchargers as well as small fast spooling turbo charges we developed the MAFU controller. This controller uses the signal from the vehicles stock MAF sensor (or MAP sensor in Chrysler) to modulate injection. By using airflow rather than boost pressure the unit is not fooled by the sharp boost spikes and can produce a smooth injection curve as airflow increases. The unit can read signals from any 0-5 volt MAF or MAP as well as any frequency based MAF for a wide range of applications. It is similar in appearance to the VC-20 black box controller and uses the same mechanical dials to set “start” and “full” points.
Because the controller does not require boost pressure it is also compatible with normally aspirated vehicles with fuel injection. This application has been gaining popularity with normally aspirated applications for a cleaner cooler running engine and in certain areas to offset sub-par pump gas.
Stage-2 Muscle Car Part#220
In much the same way we addressed the demand of certain applications with the MAFU controller, we developed the Stage-2 Muscle Car system for carb’ed normally aspirated vehicles with too much compression to just run pump gas. The MCVC controller uses manifold vacuum to control injection. This controller is a black box style with two mechanical dials for setting “start” and “full” points with injection increasing as the throttle plate opens reducing vacuum.
This controller also features an adjustable RPM lock-out so that there is no injection in the lower RPM levels. This controller is suitable for all carbureted normally aspirated applications and is especially useful for 10:1+ compression engines where more octane is needed. Using 50% methanol on top of 91 octane pump gas will give the same effective octane as 118 octane race gas.
Snow Performance Stage 3 controllers are the pinnacle of accurate injection technology. For a more correct injection curve, they use dual data sensing to more accurately inject in line with your engine’s demands. They are designed for EZ set-up so you don’t need a lap-top or a PHD to use them. Our Stage 3 gas controllers use both boost pressure and injector pulse width or fuel rail pressure to modulate injection based on a 2D map.
Stage 3 EFI/DI Part# 310/320
Our stage 3 controllers are compatible with both port fuel injected engines and direct injected engines. The controllers operate in the same manner but sense fueling data in different ways. Along with boost, The EFI version uses a fuel injector pulse width reading to correspond with horsepower output. The direct injected controller uses the fuel rail pressure sensor for its power output reference. Stage 3 controllers can be weighted between the boost information and the fuel information they reference. This means that if the user wishes to inject based more upon fuel system demand or boost pressure, they can tell the controller to weight its injection map one way or the other. This ability to adjust the injection based up two reference points means the controller can be used with all forced induction Fuel Injected applications regardless of the shape of the boost curve. Use part # 310 if your application is manifold injected ( EFI). If your application is Direct Injected (DI), use part # 320. This is the most adjustable and advanced controller and is suited to newer finely tuned engines and for applications where numerous engine modifications will need to be accounted for. The Stage 3 controller can be used in every application except a carbureted engine.
Stage 3 controllers come with the ability to control a second nozzle independently for the widest range of injection - just like the VC-50 controller used the “New” stage-2. This operates in much the same way but can be activated by either boost or fuel reference.
These are the water-methanol controllers we offer at Snow Performance and this comprehensive list for gasoline applications should aid in selecting the right controller for your needs. As you can see our stages of controllers are not determined by power level but rather how the controller collects and registers data to control injection. The factors to consider when selecting a controller should first be to determine the fuel and boost system your engine is using or will use, and then decide your goals for the system and the level of technology you want to use. Our staff is always happy to help with suggestions so you get the correct system for your application!