[Squidget]

Originally Posted by VIERsr

I did not find a higher turbo lag on the S58 than on the S55, just a higher boost threshold. I think there is confusion between turbo lag and boost threshold and what they are caused by, it is not just a question of "bigger turbos = more lag", but a more complex issue.

Right, nor have I felt it with my butt dyno.

If we were talking N55, then yeah. Its twin scroll single turbo spools up insanely fast AND it has a low boost threshold.

But for all the modern S motors that I've tried, if there's a lag difference, I can't feel it. So I guess it's moot for me. YMMV.

When it comes to Boost Threshold? ABSOLUTELY, the S58 reacts like a pouty child at low RPMs. As expected. But up top, it is a beast.

[VIERsr]

Originally Posted by Squidget

Right, nor have I felt it with my butt dyno.

If we were talking N55, then yeah. Its twin scroll single turbo spools up insanely fast AND it has a low boost threshold.

But for all the modern S motors that I've tried, if there's a lag difference, I can't feel it. So I guess it's moot for me. YMMV.

When it comes to Boost Threshold? ABSOLUTELY, the S58 reacts like a pouty child at low RPMs. As expected. But up top, it is a beast.

Exactly, and not only that.
Take the N54, with a very low boost threshold, but with a rather annoying turbolag. The N55 with twinscroll technology has improved the situation a lot.
Or take the three turbo cars in the video: the RS3 has the lowest boost threshold of the three, but the highest turbo lag, mainly due to the poor, dated intake design - and the worst gearbox, which is why the result is poor in this comparison, but the potential is very high -.
The S58 and 45AMG have similar behavior, but at a different level.
That 2.0l is astonishing, AMG knows how to make engines.

[Squidget]

Originally Posted by VIERsr

That 2.0l is astonishing, AMG knows how to make engines.

They do for sure! I think they have the highest HP 2.0L mass production engine in the world, over 400 HP.

Edit: yeah the M139 engine is 416 HP. Bonkers.

[MmmmmM2]

Don't mind me. I'm just here for the comments.

[Valence]

S58 FTW

[VIERsr]

As much as it is an inevitable comparison that would come sooner or later, there is not much to be surprised about.
It's a 3.0 twin-turbo vs a 4.0 NA vs a 2.5 turbo vs a 2.0 (!) turbo, how else could it have gone? I would have been surprised otherwise.
This race neither celebrates the M2 nor denigrates the others, it just shows what everyone expected to happen. I was more interested in the (sub)challenge between A45 and RS3 than anything else.