After switching the pulley to a 2.81 is a tune required immediately? If so, does anyone know the air/fuel ratio needed so I can at least drive it for a few weeks before having it professionally tuned?
I wouldn't rely on someone elses tune if I were you. All of these cars respond differently and when it comes to cramming additional airflow into the engine, you want to make sure it's spot on when you get on it. Iwould just wait til the day or so before you're heading to the tuner to do the pulley swap and once its done, take it easy (keep your foot out of it) on the way there. You're going to need a puller to get the old pulley off, since the M112 uses press on pulleys (unlike the M90 that uses a keyway), so it may not be quite as easy as you think.Does anyone have the tune for me to put in? I have the tuner and hopefully could put those numbers in until I get to the tuner (1 week later) after doing the swap. If that's a no-go, I assume it is incredibly easy to swap and could probably do it at the tuner, with the puller.
I wouldn't rely on someone elses tune if I were you. All of these cars respond differently and when it comes to cramming additional airflow into the engine, you want to make sure it's spot on when you get on it. Iwould just wait til the day or so before you're heading to the tuner to do the pulley swap and once its done, take it easy (keep your foot out of it) on the way there. You're going to need a puller to get the old pulley off, since the M112 uses press on pulleys (unlike the M90 that uses a keyway), so it may not be quite as easy as you think.
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