S58 engine preview

[doublespaces]

This video reveals quite a bit of information about what we can expect and there may even be a few hidden clues in here that haven't been confirmed yet.

It looks like the S58 will not be using the integrated exhaust runners like the B58 which is great news for anyone looking to upgrade.

Specs from the X3 M:

Power Unit Config/No of cyls/valves In-line / 6 / 4
Engine technology M TwinPower Turbo technology with two mono-scroll turbochargers, High Precision Injection, VALVETRONIC fully variable valve timing and Double-VANOS variable camshaft timing
Effective capacity cc 2993 Stroke/bore mm 90.0 / 84.0
Compression ratio :1 9.3
Fuel RON 98 (min. RON 95)
Max output kW/hp 353 / 480 at rpm 6250
Max torque Nm 600 at rpm 2600 – 5600

hub?

Dedicated exhaust runners

Intake pipes in front, wonder if A2A conversions become a thing?

What else?

 

[doublespaces]

The air comes in and down around the front then up into the air to water cooler then into the engine. I'd expect to see a lot more creative intake boxes this time.

 

[Torgus]

I'm excited to see where this engine goes...hopefully bmw does to neuter anything.

 

[Jake@MHD]

Max of 350bar fuel pressure is insane!

 

[myLilTurbo]

350Bar is 5076~Psi according to my trusty internet search

 

[doublespaces]

Looks like there is room for a third HPFP, depending on what is already there

You get a really good look at how these pumps interface with the camshafts:

Each exhaust port is clearly shown, looks like the head can be ported as well:

 

[doublespaces]

"Effective capacity cc 2993 Stroke/bore mm 90.0 / 84.0 "

So, undersquare and slightly less displacement compared to the shorter stroke of the S55? (89.6 bore/80 stroke)

 

[Jake@MHD]

Looks like there is room for a third HPFP, depending on what is already there

I imagine something is already filling that spot. Regardless, that spot is not in line with the other two pumps.

Can what type of lobe is it? Looks perhaps triangular, similar to the mini-cam in the vac housings currently.

 

[kayzrx82]

The increased fuel pressure is expected with that much increase in hp over the s55.

 

[kayzrx82]

Good to see they stuck with a mechanical water pump. Also has a small electric pump to run water to the turbos when the motors shut off. I'm still on the fence with the rear timing drive . You won't have to worry about spun crank hubs anymore though.

 

[doublespaces]

I imagine something is already filling that spot. Regardless, that spot is not in line with the other two pumps.

Can what type of lobe is it? Looks perhaps triangular, similar to the mini-cam in the vac housings currently.

It looks like the camshaft itself is missing the lobe as well?

 

[doublespaces]

Good to see they stuck with a mechanical water pump. Also has a small electric pump to run water to the turbos when the motors shut off. I'm still on the fence with the rear timing drive . You won't have to worry about spun crank hubs anymore though.

So, its all internal somewhere here?

 

[kayzrx82]

So, its all internal somewhere here?
View attachment 22751

Yeah , that black cover is hiding the timing chain vanos gears. This will suck to service, but it's suppose to be a "lifetime" item. Hopefully they fixed whatever rear cam drive issues they were having with the diesel n47 motors that first used this setup. The timing chains were ( still are ) stretching and breaking needing service. Hopefully that's been addressed. This is one of the things that scared me about the b58 and now the s58 has it. Only time will tell. I wonder where they put the solenoids for the exhaust and intake cam.

 

[Bnks334]

S58 is the real tuner engine. No "headifold." People will be upset if they end up putting the S58' into the Supra/Z4.

 

[Jake@MHD]

S58 is the real tuner engine. No "headifold." People will be upset if they end up putting the S58' into the Supra/Z4.

I highly doubt they will. If anything the Supra will get the regular exhaust manifold version of the B58.

 

[Bnks334]

I highly doubt they will. If anything the Supra will get the regular exhaust manifold version of the B58.

Looks like the Supra and the European market Z4 M40i get the B58B30C which is the "headifold" cylinder head. The different cylinder head seems to call for different rods and pistons. Probably to offset some small change in compression ratio due to the head design.

The US-spec Z4 M40i and G20 M340i (this "M" marketing shit is getting crazy) cars all seem to be getting the B38B30B which is the standard 6 port head.

Guess we'll find out which proves more tune-able. This hinders Supra turbo development carrying over to existing B58 platforms but maybe the S58 will be interchangeable?