First is it possible to make the multiply MAP behave like I want? How would I accomplish this? Is there a reason I shouldn't try to accomplish this dual multiply MAP functionality? My reason for wanting to do this is to have some barometric/elevation correction to the alpha-n portion of my tune. Is there a better way to get barometric correction to the alpha-n part of my fuel map? I am aware of a lot of confusion concerning MS baro correction. I may be confused too.
As I understand it, the typical MS baro correction is for exhaust back pressure. The change in manifold pressure due to barometric pressure is accounted for by the MAP sensor in speed density. When outside air pressure changes, the MAP sensor "sees" this change. But, as I understand, if you are using alpha-N, you only get exhaust back pressure baro correction, unless you do something like multiply the baro sensor output. I'm not sure how the multiply MAP works in ITB mode. By default would it be multiplying over the entire fuel map or just during speed density part of the fuel map?Thanks,
Brad