true and everything should be taken as only informative not definative as with everything engine related, but it gives a solid idea as to where the curve shifts with just a simple cam change on this particular setup.
Depending on dyno you can actually do a drive cycle through each gear (timed and loaded the same as the street) and look at the effect lower gears (lower/shorter load) have on the afr's. We looked at one of the race logs from PI and matched the time in gear so we could "better" replicate the added loads of aero drag etc
You can also set it up a cruise load then nail it (in any chosen gear) and launch into a loaded pull, this allows better tuning of said transients... not perfect but damn close.
Would love to see your car on the dyno one day Ash, you can even provide a operator if you wish, would be good to set a known comparo for all the guys on here that dont seem to get the gtss's working right (ive heard your is very well setup).