Adrelanile simulation? Well, i think i do release adrenaline while playing... fell fear with yak's on my tail, mi heart beats acelerates in dogfight...
Concentrate in simulating the pilot fatigue. Stop pilots making +6 -6G's for ten minutes without not even a problem. 4G's is already a painful punch on the stomach.
Only professional acrobatic pilots can take +9G -9G's and only for seconds... I like watching the acrobatic sports on EuroSport and they talk a lot about pilot fatige and G's.