Which is the best route to go for me before I spend money getting the engine tuned ? Use a straight up APYP bin with modified fan n2 request, or modify a 350 auto bin with ARAP or APYP tables and constants basically im just confused on what to do ive tried a couple bins and copied some tables to others and have ran the car on them and have noticed some differences but not much so im just stuck wondering whats the best before I got spend a few hundred on a tune. Im also having a slight problem with the car where it cuts out at around 4500 as if im letting the gas pedal off.