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      04-17-2023, 07:05 PM   #1
EB340iRWD
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340i BM3 Stage 1 31+ PSI??!

Need help understanding this. I'm new to bm3 and logging etc and have been testing different fuels/maps etc. Car is a stock 340i except for stage 1 tune and awe exhaust. I typically run the stage 1 multimap but wanted to log the dedicated 93 map to compare. Anyways, the targeted/actual boost levels seem alarming. Does this seem normal to you? I have read the stock turbo cannot handle this much boost. Also, the rpm log also seems wonky. It normally has a relatively linear slope, here its seems to accelerate at a faster rate higher in the rpms. Any input is appreciated.

https://bootmod3.net/log?id=643b77fcd10b431263ec7e0b
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      04-17-2023, 07:52 PM   #2
morritse
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It's probably reading absolute instead of gauge pressure, so subtract 14.7psi

Not sure why bm3 logs that way
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      04-17-2023, 07:55 PM   #3
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Quote:
Originally Posted by morritse View Post
It's probably reading absolute instead of gauge pressure, so subtract 14.7psi

Not sure why bm3 logs that way
It doesn't unless that's how you have it set.
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      04-17-2023, 08:46 PM   #4
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Quote:
Originally Posted by n55david View Post
It doesn't unless that's how you have it set.
All other map logs on multimap show 17ish psi so I don't think I have it selected. That said the math does sort of lineup? I'm at a basic level reading logs but nothing obvious seem stand out as being significantly off, you would think if it's running that much psi there would be obvious issues. The rpm curve is still a head scratcher.
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      04-17-2023, 09:00 PM   #5
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Quote:
Originally Posted by EB340iRWD View Post
All other map logs on multimap show 17ish psi so I don't think I have it selected. That said the math does sort of lineup? I'm at a basic level reading logs but nothing obvious seem stand out as being significantly off, you would think if it's running that much psi there would be obvious issues. The rpm curve is still a head scratcher.
You don't have 30+ psi..
You have settings changed in the datalog settings
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      04-18-2023, 08:59 PM   #6
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Thanks!! That makes alot more sense.
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