13B Power @ 1 bar absolute pressure, to see what you might have if you MAN UP!

Barry Bordes · 02-04-2014, 06:52 PM

"What I was asking for the system you use is if you could hold steady state at 7800rpm and average out a hundred cycles I'd be interested to see the 'mean' pressure to take out cycle to cycle variations. Is that possible the way you test? "

The tests are run like your Vbox runs.
Real world flow to the radiator, intercooler and air box. Air drag to the car... you know on the "test track".
But I can't hold load at 7800 rpm. That is passed in a microsecond.

Here is IMEP 4500 to 8000rpm (early testing with 12 psi).
If you can make out the poor screen-shot below you will see which buttons are activated.
In this case the blue HP/MEP/T /RPM button is slected then the IMEP is expanded, plus the green Cycles button, and Select Data.

The other screen shot above has Combustion selected so it runs every cycle like a movie.
That is just one frame. I would have to do a YouTube video to show you the whole run.

But yes there is a great deal of deviation cycle to cycle. Reversion problems I would guess mostly.... a good cycle pollutes the 2nd following cycle.

02-04-2014, 06:52 PM	#25
Barry Bordes Rotary Fanatic Join Date: Feb 2008 Location: Slidell, LA Posts: 191 Rep Power: 18	"What I was asking for the system you use is if you could hold steady state at 7800rpm and average out a hundred cycles I'd be interested to see the 'mean' pressure to take out cycle to cycle variations. Is that possible the way you test? " The tests are run like your Vbox runs. Real world flow to the radiator, intercooler and air box. Air drag to the car... you know on the "test track". But I can't hold load at 7800 rpm. That is passed in a microsecond. Here is IMEP 4500 to 8000rpm (early testing with 12 psi). If you can make out the poor screen-shot below you will see which buttons are activated. In this case the blue HP/MEP/T /RPM button is slected then the IMEP is expanded, plus the green Cycles button, and Select Data. The other screen shot above has Combustion selected so it runs every cycle like a movie. That is just one frame. I would have to do a YouTube video to show you the whole run. But yes there is a great deal of deviation cycle to cycle. Reversion problems I would guess mostly.... a good cycle pollutes the 2nd following cycle. Last edited by Barry Bordes; 08-28-2015 at 11:02 AM.