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      05-14-2019, 11:47 PM   #2206

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Originally Posted by supra93 View Post
I recall this topic being posted on Jalopnik late last year.
Yeah, this jives really well with what I see. Toyota is likely planning to sell the two versions alongside each other, and they'll need to give the higher powered version some distinguishing label. "Track" would work for the purpose.

I truly believe (translation: I'm speculating here, not reporting facts) this whole mess was caused by WLTP. If not for that, all Z4 M40i's would've had B58O1 so that all M Performance 3/4 series cars (as of right now, X3 M40i, M340i, and Z4 M40i) would have had the same power in all world markets. Something (mostly likely packaging) prevented BMW engineers from installing the same emissions hardware in Z4 as they could in M340i. That resulted in the European Z4 M40i that got its wings kinda clipped with B58M1. Naturally the same had to happen to the Supra (because it's a freaking BMW, people! enough with that "Tada-san this, Tada-san that" kool-aid, OK?) for the WLTP markets, and Toyota just went with this for all other markets, probably for simplicity and cost savings. And then they had a change of heart - very recently. From what I can see, this likely happened in 2018, no earlier than that, so it could well be in response to the early feedback when the 335hp figure leaked and everyone and their mother started talking about it being a ridiculously low number for a Supra.

And while we're on the subject - how did you guys at suprakmv arrive at the idea that the difference between B58M1 and B58O1 is just the manifold? You never had to deal with BMW engineering solutions, have you? Observe:

Yeah, the engine blocks are different. And then the cylinder heads and the pistons are different, and the turbochargers are not even close. And that's only the obvious things I bothered to compare.

So sure you can mod the M1 to get it to O1's output and beyond. But that will never get you an OEM equivalent.