S4Per

<center><img src="http://s4.thefarnys.com/Logs/2008-3-11-ASP_with_SDR_and_ERs__first_run_files/2008-3-11-ASP_vs_AWE-New_vs_AWE-Old_10889_image001.png"></center><p>
Hi All,
Trying to figure out some overboosting I'm seeing. My gauge says 24.5 psi, you can see in the pic I'm maxing out not just on actual but requested also.

Question: Intuitively I could see a torn wastegate line causing overboosting i.e. ACTUAL boost being over, but would the same cause ever lead to REQUESTED being that high or is this purely software asking for that much in the first place? Is there anything other than software that would ever cause REQUESTED boost to be this high?

(I recently changed to ASP fueling)

TIA,
Per

visintainer [vis]

per did you pressure test yet?

S4Per

..pressurize the wastegate line off of the n75 with 6-8 psi to see if wastegates open, etc.

but i'm truly confused: why would REQUESTED ever be this high?

rktskicar

Your SW is asking for that much boost.

Bruce<ul><li><a href="https://forums.audiworld.com/s4/msgs/2783600.phtml">click!</a></li></ul>

S4Per

...he's been looking at this also. I have same file as Chinh (drgolfnut) who has exact same hardware as I. But apparently a 'minor' revision was made to it. <a href="https://forums.audiworld.com/s4/msgs/2741940.phtml">Chinh's logs here</a>.

I just want to know definitively if there are inputs to the ECU that would cause it to request that much or is it plain and simply that the ECU was programmed to ask for that much regardless of anything else?

rktskicar

drgolfnut boost is lower. You can always dial down your boost using SEL on Lemmi in the short term.

DocSlowMiniPerson

then put it on car B, which will request more/less boost. That looks to be the case here. Your car is most likely doing exactly as the programming is asking it to do. Just because the MAP sensor limit is stopping requested boost from being visible over that point does not mean the software is not in fact asking for the 24.5 PSI you're seeing.

S4Per

...if it's almost the exact same file?

rktskicar

It is as Doc Slow said. Different cars can respond differently to the same file.

S4Per

requested/actual is very close everywhere else.

so, i never thought what you state to be the case: i thought if it's the same software, it'd ask for the same thing.

i guess i'll get ASP to get me a revised file and see if it makes a difference.

thanks,
Per