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ispano6 wrote: ↑

03 Feb 2019, 19:12

I'd be super surprised if Renault doesn't have teething problems with their new engine architecture. We'll soon see how much know-how Marcin Budowski took with him. He claims what he knows is of no value or already banned, but when only your power steering is the same, you know something is up. He should have been on leave until the next Formula change. In any case, any progress from this team will be looked at with raised eyebrows and skeptisim.

What would such a banned aspect be?

hurril wrote: ↑

03 Feb 2019, 19:19

ispano6 wrote: ↑

03 Feb 2019, 19:12

I'd be super surprised if Renault doesn't have teething problems with their new engine architecture. We'll soon see how much know-how Marcin Budowski took with him. He claims what he knows is of no value or already banned, but when only your power steering is the same, you know something is up. He should have been on leave until the next Formula change. In any case, any progress from this team will be looked at with raised eyebrows and skeptisim.

What would such a banned aspect be?

He was quoted as saying banned suspension so I would assume FRICS, but he knows way more about rivals cars and I presume PU integration details as well. Otherwise there would not have been objections voiced.

I'll move any further comments regarding this to the car threads since its not directly PU related (so far as we are let on to know)...

Blackout wrote: ↑

03 Feb 2019, 11:52

saviour stivala wrote: ↑

31 Jan 2019, 23:37

Blackout wrote: ↑

31 Jan 2019, 16:42

Found a rear view of the 2017 engine displayed at the Paris motor show.
Exhausts look fake (no race exhausts) but turbo might be the real one. Twin entry turbine
https://servimg.com/view/14795526/2341

Aren’t all four power units turbocharger turbine scroll twin entry?. or better put, which of the four power units uses a single entry turbocharger turbine scroll?.

Renault used a single entry turbine from 2014 until... I dont know

'Renault used a single entry turbine in 2014?'. I didn't knw that.

PlatinumZealot wrote: ↑

03 Feb 2019, 17:53

Blackout wrote: ↑

03 Feb 2019, 11:52

saviour stivala wrote: ↑

31 Jan 2019, 23:37

Aren’t all four power units turbocharger turbine scroll twin entry?. or better put, which of the four power units uses a single entry turbocharger turbine scroll?.

Renault used a single entry turbine from 2014 until... I dont know

It was always twin scroll. You may have seen a single flange turbine, but it still has two entries in it. It would be very foolish to use a single entry turbine for a six cylinder engine.

saviour stivala wrote: ↑

04 Feb 2019, 13:50

Blackout wrote: ↑

03 Feb 2019, 11:52

saviour stivala wrote: ↑

31 Jan 2019, 23:37

Aren’t all four power units turbocharger turbine scroll twin entry?. or better put, which of the four power units uses a single entry turbocharger turbine scroll?.

Renault used a single entry turbine from 2014 until... I dont know

'Renault used a single entry turbine in 2014?'. I didn't knw that.

The single entry was a 2in1 entry, which makes it a single entry . The two final manifolds merge just before entering the turbine whereas the Merceeds and Honda turbine have two separate and opposed entries.
Yes it is a twin scroll and looks like one

Blackout wrote: ↑

04 Feb 2019, 16:20

PlatinumZealot wrote: ↑

03 Feb 2019, 17:53

Blackout wrote: ↑

03 Feb 2019, 11:52

Renault used a single entry turbine from 2014 until... I dont know

It was always twin scroll. You may have seen a single flange turbine, but it still has two entries in it. It would be very foolish to use a single entry turbine for a six cylinder engine.

saviour stivala wrote: ↑

04 Feb 2019, 13:50

Blackout wrote: ↑

03 Feb 2019, 11:52

Renault used a single entry turbine from 2014 until... I dont know

'Renault used a single entry turbine in 2014?'. I didn't knw that.

The single entry was a 2in1 entry, which makes it a single entry . The two final manifolds merge just before entering the turbine whereas the Merceeds and Honda turbine have two separate and opposed entries.
Yes it is a twin scroll and looks like one

How do you define an entry to the turbine wheel? That is where you and I differ.

For me a twin scroll by function is automatically two entries. The "opposed entry" is for packaging convenience but it is functionally the same. So when you say single entry you misrepresent how twin (or even double) entry turbines designed to function.

The photos you showed me still scream twin entry.

I kindly advise you to look up "Twin-entry" Turbo and see what you find. "Double entry" is also interesting.
The portion of the turbine wheel the entry impinges on determines "twin" or "double" entry.

Can't you just be thankful for the insightful pictures?

Thanks toTechf1 and Screwcaptain and especially @kevts
viewtopic.php?f=12&t=17679&start=345

You're right Platinum. But how should we call/differentiate these two turbines? single flange / twin flange?

does the L53 merge section have a divider ?

It looks like there is no divider so making it a single scroll turbine housing. A true twin scroll housing keeps the two exhaust streams separate all the way to the tips of the turbine blades.

Merging the streams late in the housing, at relatively high velocity is perhaps a halfway solution which would preserve some of the blowdown energy but not as effectively as a twin scroll.

According to BBC, Renault for the winter +27 hp in race and +50 hp in qualifying.

PABLOEING wrote: ↑

13 Feb 2019, 12:45

According to BBC, Renault for the winter +27 hp in race and +50 hp in qualifying.

Link please?

PABLOEING wrote: ↑

13 Feb 2019, 12:45

According to BBC, Renault for the winter +27 hp in race and +50 hp in qualifying.

Found it by the way....

"The grapevine suggests Renault have found 35kw (46bhp) gain in qualifying trim and 20kw (27bhp) in the race. If so, this would put them close to the level Mercedes and Ferrari were at in 2018, although no-one thinks the top two won't find more performance over the winter."

So pure speculation as no official staff has been quoted in that article.

If I remember correctly the best Renault has ever done over a winter was 0.3 seconds per lap. So let's increase it to 0.4 because this winter it was the best ever according to them.

Then realistically we devide it by two (because this is the Abiteboul to reality factor ) and here we go:
0.2 seconds gain per lap!

The gap was over a second, so even if they gained .4 it'll still be .7 seconds off the pace. If McLaren builds the type of chassis they are capable of building it'll be a very nice fight between the two Renault powered teams. Nipping at the heels of Red Bull until the Honda gets up to par.