[davepl]

I was talking a year or two ago to the actual GM engineer in charge of crate engine calibrations... the topic was the use of a MAF in a crate engine, because they calibrate the MAF long before you ever build your tube, so how can it be calibrated? He was of the opinipon that GM should invest in really getting the SD tune perfect, so people could run without a MAF.

Unless it's a MAF in a calibrated pipe and enclosure, I don't believe in MAFs for retrofit crate engines either.

The best they can do, then, is calibrate it for being in the middle of a 6" straight run. Mine still didn't run worth a damn that way, I had to add those honeycomb laminar flow straightener things, and then it was fine.

In the end, though, i don't know that the final MAF version is any better than the SD version was that first night!