Renault Power Unit Hardware & Software

[Singabule]

https://www.auto-motor-und-sport.de/for ... un-zeiten/

Obviously Max get's the Spec-C as well tomorrow. RB's engineers calculated an improvement of .15 to .2 seconds.

So my previous assumption, that the Spec-C is not an improvement, was wrong.

Good assessment from RB engineer, maybe the 0.3 sec from Renault officials is correct if the settings is the qualy mode and use BP fuel. Good push from Renault side and for Honda to gain more so its good for competition. However its bad for mclaren since they cant afford to change the backend and cooling to get the benefit since mcl 33 is a total writeoff

[carisi2k]

Since Max doesn't have to take a penalty to put a spec c unit in then why not introduce it in singapore instead of rushing the installation in the confines of the pit lane.

[PhillipM]

Because they realised it was as much (and possibly more in qualy) gain as Renault actually promised this time. It's looking like a decent step.

[ivanlesk]

https://www.auto-motor-und-sport.de/for ... un-zeiten/

Obviously Max get's the Spec-C as well tomorrow. RB's engineers calculated an improvement of .15 to .2 seconds.

So my previous assumption, that the Spec-C is not an improvement, was wrong.

Good assessment from RB engineer, maybe the 0.3 sec from Renault officials is correct if the settings is the qualy mode and use BP fuel. Good push from Renault side and for Honda to gain more so its good for competition. However its bad for mclaren since they cant afford to change the backend and cooling to get the benefit since mcl 33 is a total writeoff

For me it doesn't matter for McLaren. It is probably for them to save some money and go to 2019 fully prepared. They shifted their focus early to 2019 and this should enable them to finally be well prepared for thesting and season.

[GhostF1]

Does "potential reliability risk" translate into "half a race distance" at Renault..

[lio007]

Does "potential reliability risk" translate into "half a race distance" at Renault..

It might have been a clutch issue according to reports.
Who is responsible for the clutch? Team or engine manufacturer?

[nacho]

Does "potential reliability risk" translate into "half a race distance" at Renault..

Clutch problem for Ricciardo.

[PhillipM]

Hydraulics on the clutch so could have been either party, or just fat fingers on the assembly/swap.

[ESPImperium]

Does "potential reliability risk" translate into "half a race distance" at Renault..

It might have been a clutch issue according to reports.
Who is responsible for the clutch? Team or engine manufacturer?

Confirmed as the Clutch.

The clutch is the responsibility of the team, Mercedes as of 2016 started manufacturing their own in order to get better starts. Red Bull Technology do the same, it is supplied with the Red Bull Technology gearbox, of witch they had 3 others running today without issue. It could one of many issues, like a seal letting go that cost just a few pennies or a zip tie (F1 Teams use Zip Ties as a secondary/back up point of failure) that came loose or broke or got burnt away. If the clutch went, lets hope it didn't over rev the engine as it could have brick-walled the engine. Im sure Renault will check that in the coming days at Viry when they test it on the Dyno for a short time.

[godlameroso]

Could have just as easily been a hydraulic line leaking on the exhaust manifold.

[63l8qrrfy6]

Actually even though the clutch design is owned by the chassis team it doesn't necessarily mean that a clutch failure is their fault. The entire engine/clutch/gearbox is one entire system - if torsional vibration increases (for example if engine power goes up, or damping decreases or cranktrain inertia changes etc) the clutch can let go.

I'm not saying that Renault is to blame - just pointing out that whoever owns the design is not always to blame for the failure.

[trinidefender]

Actually even though the clutch design is owned by the chassis team it doesn't necessarily mean that a clutch failure is their fault. The entire engine/clutch/gearbox is one entire system - if torsional vibration increases (for example if engine power goes up, or damping decreases or cranktrain inertia changes etc) the clutch can let go.

I'm not saying that Renault is to blame - just pointing out that whoever owns the design is not always to blame for the failure.

One of the problems with being a PU customer, your chassis engineering team has very little communication with the PU engineering team (comparatively verses a manufacturer team). These kind of mistakes are far more likely with such a relationship unless things are made far more conservatively (and generally heavier).

[sosic2121]

https://youtu.be/2qtMT85B6vY
I don't know if this has been committed on before, but there is a very interesting sound. I assume it's when waste gates are fully open...

[roon]

Actually even though the clutch design is owned by the chassis team it doesn't necessarily mean that a clutch failure is their fault. The entire engine/clutch/gearbox is one entire system - if torsional vibration increases (for example if engine power goes up, or damping decreases or cranktrain inertia changes etc) the clutch can let go.

I'm not saying that Renault is to blame - just pointing out that whoever owns the design is not always to blame for the failure.

One of the problems with being a PU customer, your chassis engineering team has very little communication with the PU engineering team (comparatively verses a manufacturer team). These kind of mistakes are far more likely with such a relationship unless things are made far more conservatively (and generally heavier).

Which speaks to how tight of a ship RB run.

[gruntguru]

https://youtu.be/2qtMT85B6vY
I don't know if this has been committed on before, but there is a very interesting sound. I assume it's when waste gates are fully open...

Almost certainly wastegates. Noise occurs at all the right times where extra power would be useful - middle of 3rd gear accelerating out of a corner then 4th and 5th beginning of 6th not in 7th or 8th.

Anyone able to post the speed range - middle of 3rd (say 10k rpm) through to 10k in 6th?