Wow was that with a Megasquirt?hybrid wrote:My mate just stroked his Holden 5L and it was far enough out to have the extractors glowing red and setting fire to sound deadening. And that was after changing the required fuel in the ECU for the bigger cubes.
So yeah just be careful before you assume auto-tune can do the job on its own.
Better to start off rich and let auto-tune take some fuel out.
I didn't mean to take it out and do a bunch of quarter mile runs without checking it!!! When I went to the 347 from the 289, I started out by getting it up to temperature then revving it up gradually in the driveway in neutral, saving that tune, then going out on the road with a softly softly approach.
You could see on that dyno run I did late last year how over conservative rich I had it in unknown territory.