We've got a 454 in a stationary applications to power various pieces of equiptment. The whole setup is occcasionally relocated to different locations where can be a pretty wide variance of elevation and temperature from one to another. One month it might operate at all day long at an elevation of 1500-2000 feet and the day time temp might not get above 60 degrees, and next month it could be at a location that's at 5000 feet and the temp will be 120 degrees by noon.

It currently has a carburator (which with those extremes should really be rejetted to run properly at the differnt extremes). There has recently been some discussion about switching to a sytem such as the projection in order to overcome this. The main thing I'm trying to figure out is wether there would still be tuneability issues. I.E. would the system have to be "re-programed" for the different extremes or is the programing versital enough to compensate.