[bobbis1]

The differences between n63 and s63 are well documented (fewer than I’d like but enough to justify the extra HP/cost). The differences Btwn s63’s (non-comp/comp/cs) seem to be exclusively boost profile from turbos which is why race chip tunes achieve the same max HP for all 3 models.

Does anyone have any info on the different s68s? Given the HP profiles it seems like the x5 m60/x5m might have different turbos a la the s63/n63 but the naming convention doesn’t indicate that. If they are just the same engines with different mapping I’d be interested in an x5m powered car with air suspension and it’s going to be harder to justify the extra ~30k in cost for me. Curious if there’s any technical documentation out there yet.

[PandaSPUR]

I'd like to hear about some technical differences too, if anyone knows or has seen an article about it.

I haven't been able to find much info so far.

Aside from the engine though, that 30k price difference is also getting you other differences in the car itself (brakes, suspension, increased chassis bracing/rigidity, etc).

And at the very least the engine also has more cooling on the proper M cars to support the higher tunes.

[bobbis1]

Originally Posted by PandaSPUR

Aside from the engine though, that 30k price difference is also getting you other differences in the car itself (brakes, suspension, increased chassis bracing/rigidity, etc).

And at the very least the engine also has more cooling on the proper M cars to support the higher tunes.

Definitely agree there are other differences- just saying if I could have gotten the m50i w the x5m engine that was probably my preference (I am a softy). The cooling is a good point, but I can imagine it would not be a requirement for me given how I treat the car.

[iconoclast]

Just a head's up in case you are not aware but if you option DHP you do not get the Air Suspension.

[Tenac]

Originally Posted by bobbis1

The differences between n63 and s63 are well documented (fewer than I’d like but enough to justify the extra HP/cost). The differences Btwn s63’s (non-comp/comp/cs) seem to be exclusively boost profile from turbos which is why race chip tunes achieve the same max HP for all 3 models.

Does anyone have any info on the different s68s? Given the HP profiles it seems like the x5 m60/x5m might have different turbos a la the s63/n63 but the naming convention doesn’t indicate that. If they are just the same engines with different mapping I’d be interested in an x5m powered car with air suspension and it’s going to be harder to justify the extra ~30k in cost for me. Curious if there’s any technical documentation out there yet.

I believe they are the same engine but with the Hybrid setup. I haven't seen any released specs on the new X5M though so maybe that gets something different that helps add to the up charge. I've been looking for an old article were BMW talks about when moving to a hybrid model the power numbers fall (due to tuning and hardware) because of restrictions in the setup and how the power comes on from the electric assist.

[-Vanguard-]

I am almost certain they are the same exact engine except just different tunes. Both are S68's, no N68 and S68.

Im sure you will be able to make the M60 S68 achieve the 617 HP of the real M and Im sure both are capable of well more than 617.

They stopped it at 617 because they wanted to keep the same #'s as the pre LCI.

If the S68 is truly an upgraded engine it should have more power stock- over 700 like the new XM- which also uses the same engine.

So im sure a tune will easily take the m60 to XM levels of power.

[bobbis1]

Originally Posted by Tenac

I believe they are the same engine but with the Hybrid setup. I haven't seen any released specs on the new X5M though so maybe that gets something different that helps add to the up charge. I've been looking for an old article were BMW talks about when moving to a hybrid model the power numbers fall (due to tuning and hardware) because of restrictions in the setup and how the power comes on from the electric assist.

Most online sources describe the s68 as a clean sheet design from the ground up vs n63/s63 with the primary difference being electronic VANOS + hybrid capability. I was under the impression that the differences Btwn true M & m60 cars would be the power of the hybrid motor, but given the x5m lci has a ~10hp motor, this does not seem like the case.

[BobsM3Coupe]

Originally Posted by bobbis1

Most online sources describe the s68 as a clean sheet design from the ground up vs n63/s63 with the primary difference being electronic VANOS + hybrid capability.

I really doubt the S68 is a totally new engine from the S63.
BMW wouldn't invest that much money into developing a completely new V8 engine in a world where the V8 engine is on it's last legs.
But I hope I am proven wrong.

[bobbis1]

Originally Posted by BobsM3Coupe

I really doubt the S68 is a totally new engine from the S63.
BMW wouldn't invest that much money into developing a completely new V8 engine in a world where the V8 engine is on it's last legs.
But I hope I am proven wrong.

https://www.bmwblog.com/2022/04/15/b...vision-engine/

“However, there are literally no carryover parts from the S63 engine to the S68. It’s an entirely new engine, with only its displacement and hot-vee design remaining similar.“

I sort of agree with you but the advertising says different.

[BobsM3Coupe]

Originally Posted by bobbis1

https://www.bmwblog.com/2022/04/15/b...vision-engine/

“However, there are literally no carryover parts from the S63 engine to the S68. It’s an entirely new engine, with only its displacement and hot-vee design remaining similar.“

I sort of agree with you but the advertising says different.

I've read that but I don't believe it. Too many similarities to be an all new engine. Shouldn't be to long before the truth is revealed.

[mango773]

Originally Posted by -Vanguard-

If the S68 is truly an upgraded engine it should have more power stock- over 700 like the new XM- which also uses the same engine.

So im sure a tune will easily take the m60 to XM levels of power.

bmw xm has only 450 engine horsepower. with 200 on batteries.

[Alan l.]

I find it strange that BMW is rather tight lipped about this. In the past when there was a major update it would be followed by a detailed technical document highlighting all the changes and improvements.

Do we know if the LCI M60 and X5M have the exact engine code? Sometimes the code is followed by different numbers/letters to factor slight differences or updates. S63tu2, tu3, tu4 etc...

[BobsM3Coupe]

Originally Posted by Alan l.

I find it strange that BMW is rather tight lipped about this. In the past when there was a major update it would be followed by a detailed technical document highlighting all the changes and improvements.

I also think its very suspicious the way they have released nothing about the so called all new S68 engine.
Prove it BMW.

[mango773]

Originally Posted by Alan l.

I find it strange that BMW is rather tight lipped about this. In the past when there was a major update it would be followed by a detailed technical document highlighting all the changes and improvements.

Do we know if the LCI M60 and X5M have the exact engine code? Sometimes the code is followed by different numbers/letters to factor slight differences or updates. S63tu2, tu3, tu4 etc...

m60i engine number is S68B44A.
M should have different one. you can check it on your x5m.

[r33_RGSport]

Originally Posted by mango773

m60i engine number is S68B44A.
M should have different one. you can check it on your x5m.

Just checked parts catalog, all the same engine code. S68B44A.

[Ibiza]

Does the S68 on the M60i’s require the 1,200 mile M break in service?

[roamio]

Engines are the same but there are differences. Search for S68B44A shows two different engines (see below). Since there is no official comparison it's all pure speculation. Is it only turbo boost? Valves, camshaft and so on? I think differences are not that large since price is the same for M and non-M.

https://parts.bmwnorthwest.com/produ...chTerm=S68B44A

[eelnoraa]

Originally Posted by roamio

Engines are the same but there are differences. Search for S68B44A shows two different engines (see below). Since there is no official comparison it's all pure speculation. Is it only turbo boost? Valves, camshaft and so on? I think differences are not that large since price is the same for M and non-M.

https://parts.bmwnorthwest.com/produ...chTerm=S68B44A

“Short” engine means the short block, the bottom half of engine, without heads, right?

[roamio]

Originally Posted by eelnoraa

“Short” engine means the short block, the bottom half of engine, without heads, right?

Correct, no turbos, no valve covers, no injectors and so on. Complete engine would be close to $40,000.

[roamio]

If it helps below is from official TiS for my M60i. I can upload full PDF if somebody wants to.

BMW Group - AIR: 2023-09-10 / 16:00 Dealer:
Model: X5 M60i xDrive
Vehicle identification number: 5UX33EUCXXXXXXXX Development code: G05
Model code: 33EU
Lead type: 33EU
Functional description
8-cylinder spark ignition engine S68844TO FUB-FUB-FB-110001-A22 - V.1
8-cylinder spark ignition engine S68B44TO
The S68B44TO engine is the successor of the engine S63TU4 and the engine N63TU3 and is technically based on these two engines. The S68B44TO engine will be used for the first time from July 2022.
The high-performance engine is the future stand-alone V8engine and is used in the series of BMW AG vehicles as well as in the series of BMWM GmbH.
The S68B44TO engine complies with exhaust emission standard EURO 6d Real Driving Emissions 2 (RDE2) and has already been designed for the use of future exhaust emission standards. At the same time, an increase in power and torque could be achieved.
The engine was developed for robust emission behavior, the ability for the 2021 service pack empowerment as well as for mild hybrid technology (48-volt electrical system) and as a PHEV.

Some other notes from the same doc:
***The cylinder head cover is conceptually the same as the engine N63TU3 with small modifications to crankcase ventilation and active oil separation.
***The belt drive was taken conceptually from the engine S63TU4. The crankshaft belt pulley is new.

And blah blah blah for 30 pages of engineering.....

[bayarea328xit]

Originally Posted by roamio

If it helps below is from official TiS for my M60i. I can upload full PDF if somebody wants to.

BMW Group - AIR: 2023-09-10 / 16:00 Dealer:
Model: X5 M60i xDrive
Vehicle identification number: 5UX33EUCXXXXXXXX Development code: G05
Model code: 33EU
Lead type: 33EU
Functional description
8-cylinder spark ignition engine S68844TO FUB-FUB-FB-110001-A22 - V.1
8-cylinder spark ignition engine S68B44TO
The S68B44TO engine is the successor of the engine S63TU4 and the engine N63TU3 and is technically based on these two engines. The S68B44TO engine will be used for the first time from July 2022.
The high-performance engine is the future stand-alone V8engine and is used in the series of BMW AG vehicles as well as in the series of BMWM GmbH.
The S68B44TO engine complies with exhaust emission standard EURO 6d Real Driving Emissions 2 (RDE2) and has already been designed for the use of future exhaust emission standards. At the same time, an increase in power and torque could be achieved.
The engine was developed for robust emission behavior, the ability for the 2021 service pack empowerment as well as for mild hybrid technology (48-volt electrical system) and as a PHEV.

Some other notes from the same doc:
***The cylinder head cover is conceptually the same as the engine N63TU3 with small modifications to crankcase ventilation and active oil separation.
***The belt drive was taken conceptually from the engine S63TU4. The crankshaft belt pulley is new.

And blah blah blah for 30 pages of engineering.....

Please post the PDF - would enjoy some light reading...thanks!

[imperfectluck]

Originally Posted by bayarea328xit

Please post the PDF - would enjoy some light reading...thanks!

Def agree yeah, I’ve been wanting to know about the engineering differences from the S63 -> 68 as I also don’t get why they’re so tight lipped about it neither. Part of me feels like it’s intentional for the engine to arrive in the G90 though we would imagine it would also be the S68 just a different version.

Conceptually though the engineering designs seem similar to the S63 but would love to know more of the changes they decided to introduce instead of just gracing the G05 LCI with the S63.