10-24-2021, 08:57 PM | #1 |
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M2 FBO "psssshhhhhhh" sound under high boost
Hey all, I recently got the charge pipe, downpipe, spark plugs, radiator, intercooler, oil cooler, and trans cooler upgraded on my car. I noticed that when under high boost there's a "psssshhhhhh" noise coming from the engine. The best way I can describe it is like a vacuum cleaner noise, or a high pressure of water coming out of a hose. It's not a whistle or a hum, just straight "pssssshhhhh" (exactly how it sounds). Almost like the diverter valve is venting, but constantly. It only happens under nearly max boost, doesn't happen if I rev the car, so the car has to be under load.
For those of you that have this car and are running stage 2 tunes, do you notice this? Is this normal on these cars with my upgrades? Thanks in advance! |
10-25-2021, 02:50 AM | #2 | |
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I am also going to assume you installed everything correctly - i.e. all o-rings were lubed and installed in the proper orientation on the charge pipe. The pipes were fully seated and the c-clips were fully seated as well. Then all couplers were tightened as well. Also do you have an upgrade diverter valve?
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10-25-2021, 07:19 AM | #3 |
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Interested in the solution too. Upgraded my Charge and Boostpipe, guess i have the same pssshhhhh under high load.
Which tool is the best to log the data, Bimmerlink? And which value should be logged? Best regards Christian |
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10-25-2021, 01:35 PM | #5 |
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Bimmer link should work, but I prefer mhd, ecutek, or bm3 logging.
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10-25-2021, 02:41 PM | #6 | |
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I actually have no logging tools apart from BM3. Total noob when it comes to the tuning world of BMW honestly. Can I log via Bootmod3? Any suggestions on what I should be logging? Also, how do I run an ISTA scan? As for the parts, they were installed by a very well reputed shop that is known for cranking out high horsepower BMW’s (especially F chassis M cars). The specific parts are as follows: CSF: Intercooler, Radiator, Oil Cooler, DCT Cooler Evolution Racewerks Chargepipe VRSF Downpipe NGK Spark plugs Thanks! |
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10-25-2021, 03:19 PM | #7 |
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Here is a link to the specific noise I’m talking about. You can hear it at 2500 RPM, but you might need the volume cranked.
View post on imgur.com |
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10-25-2021, 03:43 PM | #8 | |
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To do an ISTA scan you need ISTA, there are threads on the forum on how to get it. You should also talk to your shop then, if they're reputable they would take care of any of your concerns.
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11-01-2021, 10:56 AM | #9 |
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Do a test drive. This is a pull (not full in first gear) to around 120Kph. Overall length of measure was 25seconds. I am not a excel nerd, try my best to import/convert data from Bimmerlink:
What you are thinking, everything OK? I guess the "psshhhh" is a bit quieter since last time driving. Because of the 0,00bar and 0,17bar in Idle: I have a AK Motion Display and in IDLE it shows me setpoint 0,00bar, measure 0,00bar. |
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11-01-2021, 01:07 PM | #10 | |
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11-08-2021, 08:44 AM | #12 | |
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11-09-2021, 08:09 AM | #13 |
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11-20-2021, 10:57 PM | #14 | ||
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It is getting checked out on Monday |
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11-24-2021, 02:03 PM | #15 | ||||||
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