15k BTU on 2200 watt generator

drsteve wrote:
But at the same time, Chevy engineers get 650 HP and 650 lb-ft of torque out of a pushrod activated small block V8 that passes emissions specs and will run for many thousands of miles, even if the owner has a lead foot.

When they engineered this engine, no doubt they knew going in they were constrained to lower RPM's due to the OHV design and designed it accordingly. Based just on the even up HP/torque numbers (650/650) it's obviously a relatively low revving engine. When the torque numbers get significantly higher than the HP, then the max rpm's drop accordingly (i.e., diesel). When the HP numbers become a multiple of the torque rating (F1), then you're talking massive rpm's and a mandatory DOHC configuration.