#1083, "RE: vacuum/boost source for FMU" In response to In response to 6
I would just hook the FMU up to the manifold. I'd figure the manifold pressure is the most important one. Its after the pressure loss in the IC/piping, after the BOV, and after the throttle plate. Thats the air thats actually going into the engine. I don't recall ever having a problem with the FPR reacting too slow.