Is this the small or large combustion chamber ?
They look good, what you want on a flathead is very good transfer area between the cylinder and the chamber don't care about the compression ratio.
The plug over the exhaust valve is good, keep the piston tight to the head to push all the mixture over into the chamber, this is the best swirl, tumble, etc. that you can design in a combustion chamber. That is why you don't need much advance on a flathead, and it works so good with boost. Since the engine design does not need much advance you can run more boost than most engines that flow poorly.
Also on the cam, not much lift so the air can flow over the top of the valves, especially the intake valve " think mild ".
What is the firing order?
Can you post a picture of the outside of the engine.
Two small turbo's may work better than one.
You won't believe how good a turbo works on a Flathead.
Last edited by Turbo-6; 01/08/14 01:30 AM.
