Originally Posted by jetpoweredmonkey
Anyway, where I'm going with this is your experience with creating maps on a dyno (or watching someone do it, whichever)...seems like the dyno is typically used to find A/F ratios at WOT to correct for open pipes, etc. Great, but I wonder if your dyno guy is also able to tune at part throttle openings and low to mid RPM, which is in my opinion where the 990 needs all the help. Refining that part of the map would be huge.
Tuning with a dyno allows you to trim fuel for the entire RPM range...
Secondaries are soley for noise control... period.
FI systems don't require high intake velocities through the throttle bodies... there are no venturies.