Some Factory 340-4 and 340-6 Dyno Runs

71 340 4 Run

With some magnification, I believe this shows that the Thermoquad 340 engine made 280 HP at 5400 rpm and 380 lb. ft. of torque at 5400 rpm and I bet a dyno room exhaust, air cleaner base plate only.

71 340 4 2.jpg