I have the Dyno 2000 program.
Can someone help me to figure out how to do the compression ratios?
The trouble I am having is when putting in the combustion chamber volume, the program wont accept 114cc. It will accept under 100cc though.
I must be doing something wrong but don't know what.
Well, I don't have any trouble entering the figures, perhaps do an uninstall and re-install.
My copy took 114 cc chambers just fine.
CR is 13.27:1 (on a 4" stroke, you left out info)
What it forces you to do on a dome piston is this. Lower the piston into the engine, so the dome is flush or below, and measure cc volume above.
The other prog. I have is easier all in all, go find a copy of it and download.
On the blower pressure, you just enter the boost you want. There doesn't seem to be any attached correlation in the program, but as much as I tinker with DD, I almost never have used it on blown detups, so my experience there is limited.
Besides, belt ratio on the actual engine is a factor of so many things to get 15psi of back-pressure (which is all boost really is). Free-flowing heads will lower boost (all other things equal) so what you can do on DD is to see what happens by then, and then see what the real engine does. Better breathing heads will take a lot more blower speed to get to 15#, worse flowing heads will hit 15# much sooner, at a much different belt drive ratio.
I need a lot more info to do much of a build on DD.
I was wondering if the piston had to be down in the bore? I was hoping that at TDC/0 deck it figured for a flat piston and then adding 35cc for the pop up was the way it would work. Wrong again I guess.
In my forced induction program, it lists "max engine boost" which according to the help section is for a waste gated motor.
I played with pulley combos but down to 50% under driven I still had 33 some odd lbs of boost. Not the 15 I will be running.
What other program do you use that I can download?
Thanks for the 13.27:1 figure. I have to get it down to the 11-11 1/2 range. A crude start but gives me a starting point.