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Originally Posted by old_master
You're on the right track here.
This modification can not and does not affect engine RPM at any given speed. Whatever engine RPM at any given speed was before the modification, will be the same after the modification. If you want engine RPM to change, a gear ratio must be changed.
What this modification does accomplish, (besides void the warranty) is reduce air turbulence, and air velocity, while at the same time increasing air flow. Any time a restriction is introduced, the velocity will increase and flow will decrease. The shape of the "baffle" on the throttle plate causes a "venturi" effect, just as the throat of a carburetor narrows down inside. In this case air turbulence is desired. The fuel is introduced at the point where the air is moving the fastest to atomize the fuel. With fuel injected vehicles, the fuel is atomized by the injector spraying the pressurized fuel. Therefore removing the “baffle” will increase air flow allowing a smaller throttle opening, (less pressure on accelerator pedal). Both before and after the modification however, the OBDII system will maintain the desired fuel ratio so any difference in fuel mileage would be negligible. Removing the “baffle” may increase induction noise slightly. Low end performance / throttle response should improve, and may even prove to be too sensitive for the likes of some drivers. Hope this helps.
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All I am doing is stating what is happeneing to my truck, maybe 550-600 rpm is the correct idl speed for my truck...I dont know. also I dont know if 2000-2100 rpm is the normal rpm while running at 70mph....all I do know is that before the mod, it was running around2300-2400 at 70mph. If you want to argue with my truck...go ahead....anyways when the computer was relearning how to make the engine breath again mabe some other factors were changed Like RPM and the such?
PS:....My truck is a 98= NO WARANTY