It is too blurred to calculate anything.
Oo thanks I just tried subtitle, there was not any then watched without understanding
What 'internals' of the split Honda turbo have you seen?ispano6 wrote: ↑Wed Apr 08, 2020 3:55 pmHit CC to open closed captions, then the gear icon and change the language.
The English auto translate won't give you much details seeing some of the translation talks about eating and other nonsensical stuff.
What they are displaying is likely RA617H internals, possibly RA618H. Wazari-san probably could tell us. A good portion talks about bearing size and thickness can't be too large in order to achieve and maintain peak RPM.
Seeing the internal apparatus of the split turbo in front of the three gentlemen reminds me of how compact this PU really is.
618. The 619 is quite different.ispano6 wrote: ↑Wed Apr 08, 2020 3:55 pmHit CC to open closed captions, then the gear icon and change the language.
The English auto translate won't give you much details seeing some of the translation talks about eating and other nonsensical stuff.
What they are displaying is likely RA617H internals, possibly RA618H. Wazari-san probably could tell us. A good portion talks about bearing size and thickness can't be too large in order to achieve and maintain peak RPM.
Seeing the internal apparatus of the split turbo in front of the three gentlemen reminds me of how compact this PU really is.
Just what is visible in the video, but as Wazari-san said it's RA618H, likely Spec 2 and after since they are talking about it as if the bearing issues were applied in the demonstration unit. These men standing in front of it aren't that big people mind you, it's a marvel how short the compressor to turbine is which looks like it's still pretty much within the V. The V might have been flattened and spread apart a bit so that the apparatus can reside between the cylinder banks.saviour stivala wrote: ↑Wed Apr 08, 2020 5:36 pmWhat 'internals' of the split Honda turbo have you seen?ispano6 wrote: ↑Wed Apr 08, 2020 3:55 pmHit CC to open closed captions, then the gear icon and change the language.
The English auto translate won't give you much details seeing some of the translation talks about eating and other nonsensical stuff.
What they are displaying is likely RA617H internals, possibly RA618H. Wazari-san probably could tell us. A good portion talks about bearing size and thickness can't be too large in order to achieve and maintain peak RPM.
Seeing the internal apparatus of the split turbo in front of the three gentlemen reminds me of how compact this PU really is.
How can you tell ? Massflow rate could still be anything ?
I would imagine slightly lower VE due to shaping ports for highly controlled combustion, swirl and tumble. Especially if stratified combustion is used. Wouldn't that push the emphasis away from pure airflow?gruntguru wrote: ↑Sat Apr 11, 2020 6:19 amI didn't bother doing the calcs (I will later) but from memory (using reasonable assumptions) for 3.5 bar MAP, the mass flow was 0.55 and AFR was 1.6 - 1.8.
Assumptions:
- RPM = 11,000
- VE = 1.1 - 1.2
- CAT = 30* - 50* C
- Compressor isentropic efficiency = 0.8