Del,
Just add what you want to here at the end of the thread. I'd never have known you added anything if you hadn't informed us.
What Del is reinforcing is the fact that little has been done to the engine I'm running. But, what has been done is very necessary to rpms and just makes a good engine better. I am still looking for the weak spot in what we are running from a structural standpoint. I know I can't get enough air into it at present, but the bottom end is holding quite well.
I've stated it several times through this thread in different locations. All that has been done is to rework the oil porting in the crank. Regroove the bearings to allow continuous flow of oil around all rods from all mains. Reworked the rods without any detail undone. The engine was balanced internally. Line honed the main bores. Blueprinted the deck surface clearances. And by all means, and this is no knock on machine shops, but check ALL clearances for yourself before final assembly. Clean everything until you can "white glove" the entire thing. By all means, scrub out the crank oil ports, oil galleys, anywhere oil is conveyed with a gun cleaning kit until NOTHING comes out.
Now here is something I would like to hear some expert comment on. I'm considering adding NOS to the little flattie for next season. I've already decided where I'm going to locate a "plate" in the carb setups. I want to remachine a new spacer plate that fits between the venturi body and the butterfly housing. The current compression ratio and cam in our tractor would be ideal for a little "squeeze" I may need a little more lobe separtion on the cam, but I think we can survive.
Any comments on Nitrous in a flathead? I'm not very nitrous savvy.
Hudson