Also of note was that the top 2 NA engines were running mafless/speed density tunes and came out a good 10bhp more than the next in line. Im not sure why this is too many variables. However suffice to say SD tuning is certainly not going to lose you power and is my preferred method due to its ability to use highly optimised cold air intakes.
To be honest, other than taking timing OUT and messing with commanded fueling a little, not much has been done to the tune. The rockers and CAI required some extra air to be placed into the E38 factors and constants via the "virtual ve" table of efilive, thats where most of the extra power came from. I think had I messed around with WOT PE and Timing values on the dyno I might have picked a little more up, but it feels pretty good as is.I did get some knock still possibly accounting for the little dip in torque around 2500rpm. This is normally a small peak much like the one at 5000rpm.
Next stop will be the replacement "LS2" darton engine.
