Tunes Safe?

Frupal · 07-05-2021, 07:55 AM

I had a friend who’s opinion was ‘Factory is the hot setup.’ I pretty much agree. That said, do y’all think that ‘tunes’ are safe for the BMW N55? I’m thinking I should leave my 640 GC stock, wait for sanity to return to the used car market and pick up an 850 or M8 GC if I want more power.

Fun fact: The M850i engine makes 523 HP, the M8 617. These are both prime numbers. Given that BMW can tune their engines to any particular HP they want (reasonably) do you think this was intentional?

AccordTR · 07-05-2021, 10:45 AM

Quote:

Originally Posted by Frupal

I had a friend who’s opinion was ‘Factory is the hot setup.’ I pretty much agree. That said, do y’all think that ‘tunes’ are safe for the BMW N55? I’m thinking I should leave my 640 GC stock, wait for sanity to return to the used car market and pick up an 850 or M8 GC if I want more power.

Fun fact: The M850i engine makes 523 HP, the M8 617. These are both prime numbers. Given that BMW can tune their engines to any particular HP they want (reasonably) do you think this was intentional?

Tuning is safe. Every commercial tune is well within the 'safe' limits. BMW detunes it's lower spec cars to create a gap from the m cars. You noted a prefect example. I've added way over 200 hp to a stock internal n63tu and have had zero issues. The only thing tunes generally require is plugs and coils on a more regular basis.

$howtime456 · 07-05-2021, 02:52 PM

Tuning is safe if you want to run OTS. If your looking to make power you would want a custom tune with a PS2 and a fuel pump.

Wanwansuii · 07-05-2021, 03:33 PM

Yes, tunes are quite safe. Especially OTS maps. As long as your typical maintenance items like coil packs, spark plugs, air filter, oil change (and in the case of the N55 the charge pipe) are up-to-date, and you follow proper procedure when flashing the tune maps, you should be good to go.

I've had my 640 flashed for 10 months now and it runs perfectly fine. Might be going to Stage 2+ in a few months, which will bring the power closer to 410 hp and 480 lb/ft of torque.

e38740imd · 07-06-2021, 12:12 PM

yup. my car has been tuned for 40k miles. stage 2 plus with intake, cp, downpipes

no issues or hick ups.

07-05-2021, 07:55 AM	#1
Frupal Mad Fiddler 789 Rep 987 Posts Drives: 2016 BMW 640i GC Join Date: Apr 2019 Location: Los Angeles iTrader: (1)	Tunes Safe? I had a friend who’s opinion was ‘Factory is the hot setup.’ I pretty much agree. That said, do y’all think that ‘tunes’ are safe for the BMW N55? I’m thinking I should leave my 640 GC stock, wait for sanity to return to the used car market and pick up an 850 or M8 GC if I want more power. Fun fact: The M850i engine makes 523 HP, the M8 617. These are both prime numbers. Given that BMW can tune their engines to any particular HP they want (reasonably) do you think this was intentional?
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07-05-2021, 02:52 PM	#3
$howtime456 Major 301 Rep 1,230 Posts Drives: BMW 640i Join Date: Mar 2017 Location: NY iTrader: (0)	Tuning is safe if you want to run OTS. If your looking to make power you would want a custom tune with a PS2 and a fuel pump. __________________ N55 GENERAL David Shoup Tuned Fully Built By Miami Engines/Project Motorworks Precision 6266 On Steroids
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07-05-2021, 03:33 PM	#4
Wanwansuii Private First Class 66 Rep 188 Posts Drives: '14 BMW 640i Gran Coupe Msport Join Date: Oct 2020 Location: Northern California iTrader: (0)	Yes, tunes are quite safe. Especially OTS maps. As long as your typical maintenance items like coil packs, spark plugs, air filter, oil change (and in the case of the N55 the charge pipe) are up-to-date, and you follow proper procedure when flashing the tune maps, you should be good to go. I've had my 640 flashed for 10 months now and it runs perfectly fine. Might be going to Stage 2+ in a few months, which will bring the power closer to 410 hp and 480 lb/ft of torque.
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07-06-2021, 12:12 PM	#5
e38740imd Second Lieutenant 65 Rep 287 Posts Drives: 2016 640i Join Date: Oct 2019 Location: Maryland iTrader: (0)	yup. my car has been tuned for 40k miles. stage 2 plus with intake, cp, downpipes no issues or hick ups.
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