Dyno'd my stock s13

[Teb74]

Just wanted some opinions and anwsers on my pulls from this weekend at Torquefreaks in Portland, A/F metering was also included as a package... My '91 KA is very much stock with 114k miles on it, only "mod" would be a K&N drop in filter, Pulls were done in 3rd gear. I thought peak torque was made at 4400RPM? Does that have anything to do with the pull being in 3rd? My friend's also ran their cars with a much smoother HP/TQ curve, why's mine so shaky? Also my car dropped 7hp by the 3rd run.. Quite a bit for such a short period, cooling problem? Also any insight on my A/F ratio would be great. Looking foward to hearing your replies!