You shouldn't have a problem finding a machine shop that will cut down your stock pistons for you. It's not the best route to go in my opinion, but I haven't heard of any failures due to cutting down these pistons, just make sure you get a thermal barrier coating on the tops of the pistons after...
I realize that engine cubic inches does not affect camshaft lobe profiles and how suitable they are... :) Lucky for me piston-to-valve clearance is not an issue :D
You have lots of camshaft designing experience, so you already know why I'm starting with profiles designed for supercharged...
A 454 and 400 have too different of bore and strokes, the Duramax is closer, but the 396 provides the best profiles IMO. Depends what you are using it for too, a 396 BBC profile for supercharged applications won't work very well with a restrictive exhaust, you need a very well matched system to...
Similar as in roller rockers yes, he used Pro Magnum, and I am using the new Ultra Pro Magnum. I am not using a 1.5 or a 1.7 ratio though. I am also not using dimpled valves, but custom ones.
The valves are called "dimpled valves" the faces are machined down in a dome shape to increase combustion chamber space.
The 1.7 rocker ratio will give you more lift, but also greatly increase valve opening rates. I'm not sure he used strong enough springs, but you'll need stronger springs if...
I am going to try that right now, numbers won't be accurate I don't think, but it should show a shift in power band.
buddy, yes lower compression by getting thicker headgaskets (or fly-cutting the piston) would increase the valve drop.
.056" intake valve drop, with .020" thicker head...
Short and sweet;
I stated exactly why the stock camshaft works so well with everything else being 100% stock.
I also stated what makes the stock camshaft so bad once you start changing anything.
What is needed cannot be gotten with a re-ground military camshaft.
:)
I wouldn't consider $200ish out of the reach of most to get that extra boost in efficiency. You know you don't need to add more fuel to make more power, and forced induction benefits from proper airflow.
I will be getting a custom billet camshaft made yes, there isn't a camshaft company out there that has the master for one of these camshafts. Keeping both valves closed for as long as they are on this engine is GREAT for 100% stock. Anything past that it creates massive pumping losses.
Pumping...
Shaft mounted roller rockers, and headers that lead to the stock turbo location. Next get a camshaft that can take advantage of the decreased back pressure.