BM3 CS Flash for F80 barely noticeable?

numbers201788 · 08-23-2023, 02:00 PM

Hi all - I flashed my 2018 M3 to BM3's CS tune. I am risk adverse person, so going Stage 1, 2 is out of the question for me.

For whatever reason, its hard for me to tell the car is flashed. I drove it hard only once. The power feels slightly more linear/smoother but not sure if I'm just regurgitating what I read in these forums. I live in a hot US state, so maybe that impacted engine performance.

I don't have access to a dyno, so I cant see the exact power difference.

Anyone else can barely notice CS flash? Is the GTS better option?

theweebabySeamus · 08-23-2023, 03:14 PM

The CS file is, I believe, the most mild flash. GTS was noticeable for me but I'd be surprised if the CS added more than 20whp.

08-23-2023, 02:00 PM	#1
numbers201788 New Member 6 Rep 21 Posts Drives: BMW M3 Join Date: Mar 2021 Location: Florida iTrader: (0)	BM3 CS Flash for F80 barely noticeable? Hi all - I flashed my 2018 M3 to BM3's CS tune. I am risk adverse person, so going Stage 1, 2 is out of the question for me. For whatever reason, its hard for me to tell the car is flashed. I drove it hard only once. The power feels slightly more linear/smoother but not sure if I'm just regurgitating what I read in these forums. I live in a hot US state, so maybe that impacted engine performance. I don't have access to a dyno, so I cant see the exact power difference. Anyone else can barely notice CS flash? Is the GTS better option?
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08-23-2023, 03:14 PM	#2
theweebabySeamus Captain 376 Rep 902 Posts Drives: M3 Join Date: Jul 2014 Location: Bay Area iTrader: (1)	The CS file is, I believe, the most mild flash. GTS was noticeable for me but I'd be surprised if the CS added more than 20whp.
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