If it uses a iron block with a true twin turbo setup as rumored then I think it will have strong following and huge aftermarket support.

If its just a regular B58 engine from current 340i then i agree it would be HUGE disappointment.

Nope, not an M4 engine but apparently not the same as a non-M engine either. Supposedly it’s got a specially designed Compacted Graphite Iron (CGI) engine block unlike other BMW I6’s and straight from Tetsuya Tada himself is the hint that Toyota actually did address parts durability testing so as to meet their standards even though they didn’t design the entire engine themselves from scratch. From his own mouth in more than one interview he stated how surprised BMW engineers were at Toyota’s level of QC testing on parts. He couldn’t outright say that he and his engineers had to ensure that the BMW based engine had to be made “Toyota reliable” but why else would you spend a few years QC testing and redesigning many hundreds of parts to meet your own company’s standards?

Maybe I’m being negative, but I think they are after profits here, like any other brand. Doubtful they use any title of iron block in 2018 with every brand chasing fuel efficiency numbers.

The B58 can make huge power numbers when built properly, but I don’t thing BMW/Toyota are going to build this motor to please the tuners.

If they weren’t after at least some profit margin they wouldn’t be hemming and hawing as they are over whether or not to offer a Supra with a three-pedal manual transmission option. That’s a point that really lets one down... and I hope it doesn’t ultimately turn out to be true over the entire model run.

Fuel efficiency minimums could also be another reason (on top of insisting that even the Supra needs to be compatible with Toyota Safety Sense) that a manual wasn’t one of the top priorities.... though it’s not like fans and potential buyers of this car are going to care about a fuel efficient Supra Turbo.

But CGI isn’t the same as the old school iron block casting process. It’s supposedly stronger by mass due to how it is formed. So probably thinner than old style cast iron blocks but a bit thicker than more common aluminum blocks. Or... it’s exactly the same shape and thickness as a normal B58 aluminum block, only it’s composed of CGI for far greater strength and durability with high boost at the expense of some added weight over an aluminum B58 block.

Tetsuya Tada has gone on record as saying that the intention was to allow for the Supra’s drivetrain and ECU to be tune-friendly.

How they went about this is anyone’s guess but it has been suggested that the ECU and possibly other supporting electronics that would affect tuning are perfectly adequate but are designs that have been used before... meaning an OEM ECU architecture that tuners might already be mostly familiar with. Unless or until some insider info or interview or an independent teardown confirms this we won’t know for sure but you can read Tada-san in print saying that they intend the Supra to be tuneable.

Well everything Tada had said publicly is that it will be mod friendly.

To make BIG power with B58 (over 500hp to the wheels) - it would need to be built up, the stock internals are not strong enough.
This new motor should be able to hold much more......the engine pics we have seen thus far dont tell us much.
I think it will make 380hp stock which will be underrated and is sufficient. I think the wide tires (275s) on such small car should point to big power. 340i/440i has 255s in the rear with its staggered setup.

The Goodwood car with 255 / 275s setup was running on Michelin Super Sports so at least the top trim will not have run flats.

I also hope that it carries a timeless design like the edit: mk4 Supra. That car will always look good. The pics so far of the new one make me worry about how it will look in a decade or so.

Mk4 my bad