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.

RICE RACING · 02-04-2014, 08:20 PM

[QUOTE=Barry Bordes;274898]"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.

I'll have a look at that in more detail.

On the 'holding load' its pretty easy to do in 3rd gear or even 2nd gear as you wont have any more than 350rwkw of power and your braking system can do even on road tires -750kw (and hold -500kw lap after lap, even with fade) 3rd gear just makes it easier to pick the rpm you want. I can send you pics of a RS FD3S at a local track showing the power of the braking system

Little tip for you, try it

02-04-2014, 06:52 PM	#1
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.

02-04-2014, 08:20 PM	#2
RICE RACING Don Mega Join Date: Dec 2008 Location: Utopia Posts: 1,688 Rep Power: 18	[QUOTE=Barry Bordes;274898]"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. I'll have a look at that in more detail. On the 'holding load' its pretty easy to do in 3rd gear or even 2nd gear as you wont have any more than 350rwkw of power and your braking system can do even on road tires -750kw (and hold -500kw lap after lap, even with fade) 3rd gear just makes it easier to pick the rpm you want. I can send you pics of a RS FD3S at a local track showing the power of the braking system Little tip for you, try it Last edited by Barry Bordes; 08-28-2015 at 11:03 AM.