Quote: Can you tell anything about the 'dip' in all of the timingcurves at roughly around 4000rpm in these timingmaps?
It's there on all of them and the dyno graphs show it as well.
There has been some speculation that the rpm that the dip occurs will change (or not be there at all) for different intake / cam combinations.
When tuning on the dyno I started with a flat curve and ended up with a small dip closer to 4800 as other areas wanted more timing.
Here is my old 5.7 with hilborn timing and dyno. DO NOT USE THIS TIMING CURVE.
*disclaimer: the above timing curve may blow up your motor. Don't use it. ** I checked the timing with a timing gun- it was 1-2 degrees retarded at 15-18 total timing.
Mustang chassis dyno:
-'02 Dodge Viper Ex-World Challenge racecar -'73 Duster, 6.1 based 392 hilborn hemi, tko600, full floater rear 9", Hellwig custom bars, viper brakes, built for road course
