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Funny you ask! I was actually trying to figure this out for myself. It seems like there isn’t any difference at all in sound levels with it fully open. Dare I say it may have even slightly went down a notch. But it’s really hard to tell. I do know it’s not any louder. I need to flash back to oem valves and re-compare to baseline.
I have not been able to notice a clear difference with the files M has sent that are supposed to fully open the valves when the PSE button is pressed. Have you looked inside the exhaust at idle?? Stock set up opens the valve slightly. With the M file I would expect the valves to open fully at idle, but they open the same as stock.
^ I find it hard to believe that the exhaust doesn't sound much different with the valve open.
Check out Fabspeed Motorsport's analysis of the PSE on Youtube. Here is what happens:
Valve closed: exhaust goes through the smaller tube and into the muffler. There, it "mingles" through a bunch of openings, and gets recollected and back out into a small tailpipe
Valve opened: exhaust goes through a much wider tube. That tube goes into the muffler but straight back out. I don't believe that there is any exhaust "mingling". The muffler definitely dampens the sound, but it should be way louder than with the valve closed.
I have not been able to notice a clear difference with the files M has sent that are supposed to fully open the valves when the PSE button is pressed. Have you looked inside the exhaust at idle?? Stock set up opens the valve slightly. With the M file I would expect the valves to open fully at idle, but they open the same as stock.
sounds like we’re seeing the same thing. I haven’t looked at the exhaust at idle but will try to do that. I also emailed M-Eng about it and they said they can send me a flash to go back to oem valves to compare so let’s see.
Here’s what I know: when I press my exhaust toggle button, the valves should be fully open, but it sounds exactly the same during Sport+ driving as when I toggle the button again (valves should be oem now) and drive in the same mode.
Last edited by reddsektor; 03-08-2022 at 04:09 PM.
sounds like we’re seeing the same thing. I haven’t looked at the exhaust at idle but will try to do that. I also emailed M-Eng about it and they said they can send me a flash to go back to oem valves to compare so let’s see.
Here’s what I know: when I press my exhaust toggle button, the valves should be fully open, but it sounds exactly the same during Sport+ driving as when I toggle the button again (valves should be oem now) and drive in the same mode.
I think the test you want is with sport not sport+. I think the values act differently in track mode (less sound, optimized flow). Mine is much louder in normal with PSE activated, and Sport activated than sports+
I think the test you want is with sport not sport+. I think the values act differently in track mode (less sound, optimized flow). Mine is much louder in normal with PSE activated, and Sport activated than sports+
mine is exact opposite … PSE much louder (and revvy) in sport+
Hi there,
I’m looking at the charts on my phone so excuse the misread. Is the boost psi denoted on the left axis or the right? I hope it is the right otherwise I ain’t getting this tune!
Thanks.
03-04-2022, 05:32 PM
