Ive got a 731 in a carb'd hp500. whats the dropoff point? Im hitting 5600 and wondering if im hitting a wall. I was about to put on a taller set of props when i think a head gasket went. just curious where this thing is dropping off in power.

I would think your close

You might be past it already. Try a 741 if you like to rev that high.

I dont like to rev that high. I would have went with the 741 if i didnt have the gils.

Im just wondering if im running out of power and can twist a bigger prop. i guess only one way to find out

Good idea on the bigger prop.

My motor was starting to falling off on the dyno above 5500 with that cam.

On the 741 cam
Mine has mild ported heads and is blown ,it pulled to 6200 ok.

Maybe Mike280 will chime in ,he and his bro has a lot of experance with these 2 cams!!

Rob

Lifters may be giving up. . .

My HP motor would spin 5800 with the 741 no problem. Not that I ran it that hard all the time. Also was running the merc/Gil exhaust with silent choice.