Toyota GR Supra Races Into 2021 with More Power and First-Ever Four-Cylinder Turbo Model

[Axix23]

You guys... lol. Y’all got more time than me...

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[tadda]

 

[Reppunkamui]

 

[kissmyrs]

The cylinder head is a completely separate item from the block. That's been widely accepted fact for more than half a century.

Both the 2020 and 2021 Supra inline 6 engines use aluminum cylinder heads and external steel exhaust manifolds. There is no difference in that regard, thereby rendering your belaboring of the issue entirely moot.

You clearly have no understanding of compressible flow fluid dynamics, including bend radii and the K factor. As such, you're in no position to have any legitimate opinion on the matter.

https://www.pipeflowcalculations.com/pipe-valve-fitting-flow/compressible-gas-flow.xhtml

https://www.highpowermedia.com/Archive/category/exhausts/tight-bends
Excerpt: Without being able to specify what is too tight a bend, we can make some generalizations and the obvious one is not to use very tight bends unless absolutely necessary."

BMW engineers specify the 6 port head/manifold combination in the highest performance B58 variant, the S58. That alone should be enough for any rational person to see that's the superior arrangement. They'd use "the more efficient" (your words) 2 port arrangement with the (partial) manifold in head were that not the case.

The 2020 Supra's 2 port set-up is cheap solution that compromises overall engine efficiency. That's why Toyota dumped in in the 2021 Supra upgrade. If you want the better engine in a Supra, you'll need to sel our 2020 and buy a 2021.

no denying...

 

[harddrivin1le]

You should read my posted content rather than eating popcorn while wearing "3D" glasses if you're interested in the 2021 Supra's major engine upgrade.

Then again, you may not be. It's become clear to me that many 2020 Supra owners are in denial about this and would rather fabricate pseudo-engineering arguments or ignore the subject altogether.

The fact of the matter is that Toyota really did a number on 2020 Supra owners. I'd be p*ssed off had I bought a 2020 Supra, too. However, I wouldn't be in denial. I'd instead drive the 2020 car for a couple of years and get into a late model year 2022 Supra. Thing is, Toyota might install the M3/M4 S58 engine into the Supra in 2023.

 

[harddrivin1le]

no denying...

 

[tadda]

You should read my posted content rather than eating popcorn while wearing "3D" glasses if you're interested in the 2021 Supra's major engine upgrade.

Then again, you may not be. It's become clear to me that many 2020 Supra owners are in denial about this and would rather fabricate pseudo-engineering arguments or ignore the subject altogether.

The fact of the matter is that Toyota really did a number on 2020 Supra owners. I'd be p*ssed off had I bought a 2020 Supra, too. However, I wouldn't be in denial. I'd instead drive the 2020 car for a couple of years and get into a late model year 2022 Supra. Thing is, Toyota might install the M3/M4 S58 engine into the Supra in 2023.

Sorry to burst your bubble, but some of us here honestly and sincerely don't care that much, are not in "denial", and simply find this banter a bit amusing...

While you've been apparently ranting, puffing, and repeating yourself most of the day here on the forum many of us were out enjoying the day driving our 2020 GR Supra's and not even thinking about 2021...It was sunny and 75 degrees here in AZ today and the winding drive through Saguaro National Park in the Supra was amazing... Carpe Diem!

Carry on....

 

[Reppunkamui]

Ironically, the unfortunate 2020 Supra owner possibly accused of being in denial lives in a country where the 2021 Supra is not being released... .

 

[s219]

The 2020 Supra's 2 port set-up is cheap solution that compromises overall engine efficiency. That's why Toyota dumped in in the 2021 Supra upgrade. If you want the better engine in a Supra, you'll need to sell your 2020 and buy a 2021.

That 2-port design, with the integrated "headifold", was done for emissions purposes, and is the engine you would get in a range of European-market BMWs. US model BMW counterparts have been getting the 6-port setup instead.

Toyota used the 2-port setup for the first year's production in both their European and US Supra. I don't know why, perhaps they wanted a the same I6 engine in both markets, or perhaps it fit into their plans to offer a power bump in the US market in year two.

I don't think there is nearly as much conspiracy theory as folks are reading into the engine situation. And there is not nearly as much Toyota involvement either. These are BMW engines being driven by BMW product development and being made available to Toyota. Any updates are the result of Toyota using the range of engines available to them, and not specific engineering/improvements Toyota themselves made.

 

[s219]

Also, the 6-port engine shipped in the Z4 in early 2019. Is there a reason the Z4 got it and the Supra did not? Hard to say, but the engine was available and in use at that point.

 

[Axix23]

That new 6 head head looks like it’s going to have a some nice ass top end. Sorta odd why ours only got two ports...

 

[EastCoastSupra]

I still think we could swap the head.

 

[Axix23]

I still think we could swap the head.

I am sure you can but why would you ruin a perfectly new car with a nice motor? Your motor is fine the way it is.

Like Twisted Tuning said, it’s not the biggest deal in the world. Yes, it flows better but our current motor is a very good platform to start with. People making It sound like the 2020 has a d series Honda motor where the 2021 has a k series motor. Lol.

 

[digicidal]

Also, the 6-port engine shipped in the Z4 in early 2019. Is there a reason the Z4 got it and the Supra did not? Hard to say, but the engine was available and in use at that point.

My thoughts on this are one or more of the following:
1) Toyota had already confirmed problems (emissions-wise) with more powerful version... and didn't want to deal with producing two separate versions for the first year release - which is wise considering what a fustercluck dealer-wise the rollout was with a single SKU (well 3 of them but really they're just option levels honestly). This is likely also the reason they delayed 2.0 version release here.
2) Part of the deal with BMW was not to release a faster Supra than the Z4 in the same year in an effort to avoid cannibalization of each other's sales. This is supported due to the fact that the current setup is tuned to almost exactly mirror the street performance of the Z4 despite many differences, weight being primary.
3) Toyota thought the B58C was plenty "good enough" and hadn't expected how much "...but the C8 is only a little more expensive and is so much faster!" chatter was going to be blanketing social media (and traditional media for that matter). I remember Tada-san admonishing reporters at one event with something along the lines of "sure it could have handled more power... but it doesn't need it - it's perfectly balanced now."

No idea if any of those hits the mark or are way off... but Toyota (IMO at least) has always delivered cars with absolute shit performance but impressive reliability. Maybe they were trying to do the same with the MKV as well... but have already had so many complaints/problems that they decided "Fuck it... just give them the better engine... we're not going to win on the reliability front anyway with this one"

 

[EastCoastSupra]

I am sure you can but why would you ruin a perfectly new car with a nice motor? Your motor is fine the way it is.

Like Twisted Tuning said, it’s not the biggest deal in the world. Yes, it flows better but our current motor is a very good platform to start with. People making It sound like the 2020 has a d series Honda motor where the 2021 has a k series motor. Lol.

If we 2jz swap this is all a moot point.

For the majority our engine is fine. If you want to push the limits then we have to work to get there. The 6 port head will flow better giving more top end support. If we strap a big turbo to that of course we can force air faster and more efficiently through the head out into the manifold, turbo, dp, exhaust.

Even then, with the same large turbo set up the b5801 will flow better meaning everything works easier. You can be more aggressive with the tune and get more hp to the wheels quicker.

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