Not too shabby. I was watching GCN the other day and they had a bit on people posting their Uphill Hour totals. If I remember right, two of the presenters were at 1100-1200 meters. There was a "Chris Phipps" who sent in a message that he'd done 1,000. If that's multiple time national champ Chris Phipps, I'm a little surprised he didn't go better.
Chris routinely did over 4500 FPH in the Low Key Hill Climb races series during the time that I raced the series in NorCal. In fact, most of the better male climbers are above 1000 VAM or 3000 FPH.
The key to having a big VAM is a steeper constant grade climb but not too steep.
burnthesheep what is the protocol for your climbing?