Which this one still doesn't quite as its an inferior single turbo set up whereas the prior lump was a twin turbo! 15hp more from 25 years of advancement
New Supra
Re: New Supra
Re: New Supra
I can’t wait for the new Mitsubishi 3000GT which is basically a C53 coupe in a new frock.
Re: New Supra
It isn't a single turbo. It's a twin impeller turbo with each impeller looking after 3 cylinders. Very quick spool up and lots of torque. Mine for example was running just over 400lb/ft as standard which is a fair amount.
- NotoriousREV
- Posts: 6437
- Joined: Wed Apr 11, 2018 4:14 pm
Re: New Supra
That’s not how Twin-scroll turbos work. It’s a single impeller but with the exhaust gasses split in two and delivered separately to it at different angles, with the blades angled to make efficient use of the flow from each nozzle. One nozzle works best for response, the other for high boost. Overall you end up with a turbo with great response and great top end flow.McSwede wrote: ↑Tue May 21, 2019 7:56 pmIt isn't a single turbo. It's a twin impeller turbo with each impeller looking after 3 cylinders. Very quick spool up and lots of torque. Mine for example was running just over 400lb/ft as standard which is a fair amount.
Middle-aged Dirtbag
Re: New Supra
That's not my understanding after watching the Engineering Explained video. It's described as a twin scroll and each scroll is fed by a separate half of the engine. Cylinders 1-3 go via 1 manifold to one scroll and cylinders 4-6 go via a different manifold to the other scroll. I might be understanding it incorrectly but see link below from 6.45.
https://youtu.be/z_7aTQzpIOI
https://youtu.be/z_7aTQzpIOI
- NotoriousREV
- Posts: 6437
- Joined: Wed Apr 11, 2018 4:14 pm
Re: New Supra
Your explanation is correct, but a scroll is not an impeller. Each “scroll” is the path taken by the split exhaust gasses to the single impeller.McSwede wrote: ↑Tue May 21, 2019 9:21 pm That's not my understanding after watching the Engineering Explained video. It's described as a twin scroll and each scroll is fed by a separate half of the engine. Cylinders 1-3 go via 1 manifold to one scroll and cylinders 4-6 go via a different manifold to the other scroll. I might be understanding it incorrectly but see link below from 6.45.
https://youtu.be/z_7aTQzpIOI
Middle-aged Dirtbag
- NotoriousREV
- Posts: 6437
- Joined: Wed Apr 11, 2018 4:14 pm
Re: New Supra
It causes confusion in a lot of people who lift a BMW bonnet and see 'twin-power turbo' written and assume that means two turbos..
But RIC in his description.
But RIC in his description.
The artist formerly known as _Who_
- DeskJockey
- Posts: 4687
- Joined: Thu Apr 12, 2018 8:58 am
Re: New Supra
One of the 'Murican mags put one on the dyno and it apparently had a lot more power and torque than quoted.
---
Driving a Galaxy far far away
Driving a Galaxy far far away
- IanF
- Posts: 2394
- Joined: Wed Apr 11, 2018 3:58 pm
- Currently Driving: Ferrari F430 Spider
BMW M4 Comp
Mini Cooper
LR Evoque P300e - Contact:
Re: New Supra
Didn’t the first 335i have two turbos, then it dropped to one, but kept a very similar name? Plus the triple turbo on my X5 and the new quadruple on the new 6-cylinder M50d. Not surprised people are confused.
Cheers,
Ian
Ian
Re: New Supra
339 bhp at the wheels apparently which is a substantial jump on the quoted 335 at the crank.DeskJockey wrote: ↑Wed May 22, 2019 8:14 am One of the 'Murican mags put one on the dyno and it apparently had a lot more power and torque than quoted.
- DeskJockey
- Posts: 4687
- Joined: Thu Apr 12, 2018 8:58 am
Re: New Supra
And 420+ lb/ft of torque too.JLv3.0 wrote: ↑Wed May 22, 2019 8:33 am339 bhp at the wheels apparently which is a substantial jump on the quoted 335 at the crank.DeskJockey wrote: ↑Wed May 22, 2019 8:14 am One of the 'Murican mags put one on the dyno and it apparently had a lot more power and torque than quoted.
---
Driving a Galaxy far far away
Driving a Galaxy far far away
- NotoriousREV
- Posts: 6437
- Joined: Wed Apr 11, 2018 4:14 pm
Re: New Supra
That’d be getting on for something like 400 at the crank. That’s more like it!JLv3.0 wrote: ↑Wed May 22, 2019 8:33 am339 bhp at the wheels apparently which is a substantial jump on the quoted 335 at the crank.DeskJockey wrote: ↑Wed May 22, 2019 8:14 am One of the 'Murican mags put one on the dyno and it apparently had a lot more power and torque than quoted.
Although they don’t look that quick in any of the YouTube reviews.
Middle-aged Dirtbag
- NotoriousREV
- Posts: 6437
- Joined: Wed Apr 11, 2018 4:14 pm
Re: New Supra
The N54 x35i engines were twin turbo, then they went single, twin-scroll for the N55 and B58 engines.
Middle-aged Dirtbag
Re: New Supra
I argued this once with the owner of a 335i in the waiting room of a tyre shop.NotoriousREV wrote: ↑Wed May 22, 2019 9:35 amThe N54 x35i engines were twin turbo, then they went single, twin-scroll for the N55 and B58 engines.
He wasn't having it
Real-life Females
Re: New Supra
Ok - but presumably boost limited because of the overall size of the single turbo despite the fact that the exhaust gasses are delivered in two streams to minimise lag - i.e. less tuning potential? I would also imagine swapping to a bigger turbo would not be easy unless compatible with the twin scroll setup?NotoriousREV wrote: ↑Tue May 21, 2019 8:15 pmThat’s not how Twin-scroll turbos work. It’s a single impeller but with the exhaust gasses split in two and delivered separately to it at different angles, with the blades angled to make efficient use of the flow from each nozzle. One nozzle works best for response, the other for high boost. Overall you end up with a turbo with great response and great top end flow.
Sounds like a clever solution to minimise cost whilst not succumbing to the lag typical of a single turbo. I expect fiddling with the exhaust plumbing upstream from the turbo is cheaper than fitting two which was the main driver behind doing that.
And of course, back to my overall point, ditching Toyota tech in favour of using a BMW setup.
Re: New Supra
American dyno though.DeskJockey wrote: ↑Wed May 22, 2019 8:14 am One of the 'Murican mags put one on the dyno and it apparently had a lot more power and torque than quoted.
Almost as trustworthy as a Brexit Party candidate.
The artist formerly known as _Who_
- DeskJockey
- Posts: 4687
- Joined: Thu Apr 12, 2018 8:58 am
Re: New Supra
Car and Driver is usually quite good in my opinion.Simon wrote: ↑Wed May 22, 2019 10:16 amAmerican dyno though.DeskJockey wrote: ↑Wed May 22, 2019 8:14 am One of the 'Murican mags put one on the dyno and it apparently had a lot more power and torque than quoted.
Almost as trustworthy as a Brexit Party candidate.
https://www.caranddriver.com/news/a2754 ... orsepower/
---
Driving a Galaxy far far away
Driving a Galaxy far far away
Re: New Supra
Thanks for clearing that up.NotoriousREV wrote: ↑Tue May 21, 2019 9:49 pmYour explanation is correct, but a scroll is not an impeller. Each “scroll” is the path taken by the split exhaust gasses to the single impeller.McSwede wrote: ↑Tue May 21, 2019 9:21 pm That's not my understanding after watching the Engineering Explained video. It's described as a twin scroll and each scroll is fed by a separate half of the engine. Cylinders 1-3 go via 1 manifold to one scroll and cylinders 4-6 go via a different manifold to the other scroll. I might be understanding it incorrectly but see link below from 6.45.
https://youtu.be/z_7aTQzpIOI
With regards to power output, the B58 is quite healthy even with PPF. Mine did up to 360hp and 405lb/ft on the 4 Dyno runs it did when I got it. It's plenty fast