flown the zeke 5b alot. never had a elevator lockup problem like the 109s have... zekes can easily hit a dive of 450-500TAS in game and be able to pull out... although if you want to stay above the enemy then dont try and dive with them cuz well...zeros dont like fast... you lose the engine and you cannot even glide in them, its like throwing paper to wind... diving for 5k at 450mph and you wont regain the lost 5k if in a fight.
edit:last line was just example only, do not know accurate accounts. but the zeke is an E bleeder... in fact go fast like other planes and you, in the end, lose so much E from drag you cannot do much