850i vs m8 engine differences?

Jasinedward · 11-05-2023, 10:12 AM

Did a bit of searching on the differences between the two platforms and can’t seem to find much of anything. Are the internals the same between the two and only differences are tune related? Can any m8 mod work with an m850i

Tom C · 11-05-2023, 12:57 PM

Quote:

Originally Posted by Jasinedward

Did a bit of searching on the differences between the two platforms and can’t seem to find much of anything. Are the internals the same between the two and only differences are tune related? Can any m8 mod work with an m850i

Found this:

Dasky_spas · 11-05-2023, 02:14 PM

Some n63 have the external oil cooling- it'll have the motorsport package. S63 has dual oil pickup too for the sump. Mechantronics is different on the trans too but same trans unit.

Jasinedward · 11-05-2023, 03:35 PM

Quote:

Originally Posted by Dasky_spas

Some n63 have the external oil cooling- it'll have the motorsport package. S63 has dual oil pickup too for the sump. Mechantronics is different on the trans too but same trans unit.

So will all M8 bolt ons fit the m850i?

SmokieRiver · 11-05-2023, 04:43 PM

I thought the turbos were different also.

Tenac · 11-05-2023, 04:54 PM

So is the intake, exhaust manifolds and the list goes on and on.... Pistons are not the same, rods and bearings are not the same. I really wish I was able to have filmed at the BMW engine plant in Munich, When the S series is being produced the suit of parts are much different and in some cases install is different due to different tolerances within the engine components.

If your goal is to just make more power, then that is easy with either engine and no need to put S63 parts on the N63 because the aftermarket has plenty of great parts for both already. I'd even say probably cheaper too.

Tom C · 11-05-2023, 05:00 PM

https://www.caranddriver.com/feature...them-the-same/

Another article

Jasinedward · 11-05-2023, 05:45 PM

I’m in the process of getting the dme unlocked for my m4…. I haven’t looked at the m850i yet, but I’m sure the wife is going to want hers done too… I know there are 2 of them, are they both under the hood like the m550i?

TupperBMW · 11-05-2023, 07:20 PM

This is a great topic for discussion. I’ve looked into it myself. I always was under the impression that the engines were different in some key areas, but shared most of the same parts—but definitely have some hardware differences. It’s not just about the tuning.

Dasky_spas · 11-05-2023, 08:02 PM

I have an extensively researched m850. Most parts are the same and if different many can be swapped in. The turbos are different and won't fit unless all plumbing goes in as well. You'll then run into issues with sensors since m8 may have a different air measurement method.

The m8 ind runner manifold does bolt up to the m850 turbos but it's unclear how the 02 sensors will like that. 1 member did the swap and had rough idle and hasn't posted any updates yet.

The radiators are all the same as well.

11-05-2023, 10:12 AM	#1
Jasinedward Private First Class 75 Rep 113 Posts Drives: 2022 BMW m850i Xdrive Gran Cou Join Date: May 2023 Location: Tampa iTrader: (0)	850i vs m8 engine differences? Did a bit of searching on the differences between the two platforms and can’t seem to find much of anything. Are the internals the same between the two and only differences are tune related? Can any m8 mod work with an m850i
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11-05-2023, 02:14 PM	#3
Dasky_spas Lieutenant 148 Rep 552 Posts Drives: Bmw Join Date: Mar 2023 Location: NYC iTrader: (0)	Some n63 have the external oil cooling- it'll have the motorsport package. S63 has dual oil pickup too for the sump. Mechantronics is different on the trans too but same trans unit. Last edited by Dasky_spas; 11-05-2023 at 02:22 PM..
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11-05-2023, 04:43 PM	#5
SmokieRiver Private 221 Rep 92 Posts Drives: 2023 BMW M8 Join Date: May 2022 Location: Wisconsin iTrader: (0) Garage List 2024 GMC AT4x HD [0.00] 2023 BMW M8 [0.00] 2022 BMW X5 [0.00]	I thought the turbos were different also.
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11-05-2023, 04:54 PM	#6
Tenac Brigadier General 4601 Rep 3,545 Posts Drives: All Join Date: Mar 2019 Location: AZ iTrader: (0)	So is the intake, exhaust manifolds and the list goes on and on.... Pistons are not the same, rods and bearings are not the same. I really wish I was able to have filmed at the BMW engine plant in Munich, When the S series is being produced the suit of parts are much different and in some cases install is different due to different tolerances within the engine components. If your goal is to just make more power, then that is easy with either engine and no need to put S63 parts on the N63 because the aftermarket has plenty of great parts for both already. I'd even say probably cheaper too. __________________ 2022 M8 Comp Convertible 2023 718 Cayman GTS 4.0 2019 718 Cayman Base 2015 M235 Manual On the list for the M2 CS
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11-05-2023, 05:00 PM	#7
Tom C Captain 45 Rep 645 Posts Drives: M8 GC Comp, Shelby GT500 Join Date: May 2013 Location: Maryland iTrader: (0)	https://www.caranddriver.com/feature...them-the-same/ Another article
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11-05-2023, 05:45 PM	#8
Jasinedward Private First Class 75 Rep 113 Posts Drives: 2022 BMW m850i Xdrive Gran Cou Join Date: May 2023 Location: Tampa iTrader: (0)	I’m in the process of getting the dme unlocked for my m4…. I haven’t looked at the m850i yet, but I’m sure the wife is going to want hers done too… I know there are 2 of them, are they both under the hood like the m550i?
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11-05-2023, 07:20 PM	#9
TupperBMW Captain 1018 Rep 785 Posts Drives: 2022 M850i Gran Coupe Join Date: Nov 2021 Location: Chicago area iTrader: (0)	This is a great topic for discussion. I’ve looked into it myself. I always was under the impression that the engines were different in some key areas, but shared most of the same parts—but definitely have some hardware differences. It’s not just about the tuning.
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11-05-2023, 08:02 PM	#10
Dasky_spas Lieutenant 148 Rep 552 Posts Drives: Bmw Join Date: Mar 2023 Location: NYC iTrader: (0)	I have an extensively researched m850. Most parts are the same and if different many can be swapped in. The turbos are different and won't fit unless all plumbing goes in as well. You'll then run into issues with sensors since m8 may have a different air measurement method. The m8 ind runner manifold does bolt up to the m850 turbos but it's unclear how the 02 sensors will like that. 1 member did the swap and had rough idle and hasn't posted any updates yet. The radiators are all the same as well.
	Appreciate 0 Quote