I just noticed the original Mr Turbo setup for my 99 Busa added a vacuum hose from the throttle body vacuum line to the IAPS (Intake Air Pressure Sensor). In that line is a Tee and the extra fitting on the Tee runs to a small plastic check valve.
Since everything under the tank has been replaced (fuel pump, fmu (Begi), plenum, wastegate, bov, etc) this is no longer a Mr Turbo setup. So now I'm wondering (a) what the vacuum line to the IAPS does, (b) what the check valve does, (c) if this is a common mod on all Busa turbo setups, or something only on the Mr Turbo kit, and (d) do I leave it be, change it, or remove it all together. Thanks.
Since everything under the tank has been replaced (fuel pump, fmu (Begi), plenum, wastegate, bov, etc) this is no longer a Mr Turbo setup. So now I'm wondering (a) what the vacuum line to the IAPS does, (b) what the check valve does, (c) if this is a common mod on all Busa turbo setups, or something only on the Mr Turbo kit, and (d) do I leave it be, change it, or remove it all together. Thanks.