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Message: [QUOTE="footlong70, post: 1205113, member: 8456"] Yeah for sure. The H&S 300 tune does not touch the MAF map from stock. I wouldn't think any of the canned tuners would touch the map unless it was suggested. The MAP would not have to be changed for different sized turbos. The only factor affecting the MAF map would be the change of area based on the I.D. at the MAF sensor itself. I do agree however I believe there is a map we don't see on mcc or equation the pcm uses that would probably limit fuel to a point based on current airflow. A map hardcoded meant for stock tuning to help emissions numbers and reduce soot. Really when you think about it, there is no way the fuel injection event would be based solely on a throttle position and boost. That would really take away efficiency potential and mileage. The PCM could use sensors such as barometric, intake temp, boost, pyro, and back pressure to estimate the amount of air coming in to make an efficient burn but nothing will be as exact and quick as an actual air flow sensor. FWIW I leave my low boost fueling at 5 which is "no limit". Do it, I can't see why they wouldn't recommend it anyways. Maybe you can get 2 tunes with the map untouched and modified for the time it takes. Then you can see for yourself first hand if I'm full of it. [/QUOTE]

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