It was actually operator error, We had swapped in a 11:1 and smaller cam and pulled some dyno numbers. The results are below. Afterwards I put my big cam back in to get some numbers with it on the 11:1. Before all this I had to have all the 12:1 pistons flycut because of valve clearance. The result of my laziness not checking clearance you see the results. If you look at the exhaust valve pockets you can see the shiny rings in them, this is from contact.
The plans now are to put my other head back on, The cylinder only got a few little marks and should only need a quick pass on the hone. If it is does need overbore I'll get some more pistons made. I'll have to split the case also to make sure there's no debris in the bottom so i'll take the chance to have some stuff powdercoated. Any opinion on color scheme's with the black plastic? Also.. since I got a fubared head I am going to have it cut in half to see what kind of clearances we have for port work to water jacket clearance.
This is dynoed with the 11:1 ans smaller cam, We were having trouble with the rpm sensor so we had to do it in mph. The red line is a fourth gear pull, the blue line is a pull through the gears. Notice the broad power range! No peaks just straight pulling power from top to bottom!