Gryphon with the 4.2 and M5OD

[Jackpine]

This is a good question and I frankly don't have a good answer. I suspect ANY programmer will give you roughly equivalent benefits, but, many of the performance gains in a programmer come from a more intelligent shifting strategy for the "idiot" transmissions that were developed for people that are so uncoordinated that they can't drive manual shift vehicles. (If I sound like I'm not real fond of automatics, you're reading me correctly).

There are changes to the fueling strategy, cam timing, ignition timing and so on that should provide some gain however.

I think a real tuner like Bill needs to answer this.

- Jack