Why doesn't TRD recommend the supercharger for 95-96 models?
- The reason they are not recommending the supercharger for 95-96 years is because the truck's commputer (ECM) can not deal with the fact that there is not enough fuel. What happens is the ECM tries to fix the problem by retarding the timing. (It does this so much that you want gets as much of a HP gain.) Another reason is the ECM has two operating modes, open & closed loop. The ECM stays in "closed loop" when the truck is under about 80% throttle. It does this by changing the air/fuel mixture from rich-lean-rich-lean, to save gas. Once the throttle is opened more than about 80% it goes into open loop where the air/fuel mixture stays at its maximum efficiency. Since there is not enough fuel under full throttle; the 95-96 years will not go into open loop with the supercharger which robs the HP. To correct this problem see, Fuel Modifications below.