Extra hp out of my 340.

RAMM said
I don't actually care what the percentage is--I have very little faith in chassis dynoes anyways--they are only a comparator at best. As usual communicating over the internet is a clusterfuck. My point was that my observations are just what I said--about 90-100hp less on a chassis dyno than an engine dyno-BFD. I've seen extreme examples of a chassis dyno showing 150-200 HP less than an engine dyno. What I haven't seen is only a 50 hp loss ever.

Besides the OP states that he doesn't really know much about the engine and judging from that cam card if a 340 can't make 1hp/ci I'd be VERY disappointed. J.Rob

One reason why wheel dynos produce lower than expected numbers is turning the water pump, actually using headers for the car and the same carb and ignition.

An engine dyno will produce just as shitty results using a dyno carb, ignition, headers and the dyno water pump. Engine dyno testing without the same **** you use in the car is idiotic, unless you are trying to find as issue. All it does is cause people to doubt the results.