F1 » Who is testing when at the final Bahrain test?

Teams have started to confirm their driver line-ups for the final pre-season test of 2014 this week ahead of the first race in Australia

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February 26, 2014 12:57 PM

Somebody posted this at another forum (autosport):

enotsne, on 26 Feb 2014 - 08:19, said:
For those interested. Here are some of the changes Renault have made since Jerez.

Change of battery cell provider. The individual cells that make up the Energy Store have individual over-charge and over-discharge protection. These were proving unreliable due to thermal/vibration issues. Whilst the energy store is sealed in our fitment, I am informed the cells are now supplied by Panasonic.

Change to MGU-K to Crank drive gearing. The original torque multiplication factor was calculated to give a wider spread of torque on acceleration. Track testing found that this was causing traction dificulties and overloading the gearset and causing failure of the crank casing.

Change to turbocharger wastegate function. Renault had originally intended for the H to regulate Turbine speed in 95%+ of normal running. They facilitated this by allowing the H to pull charge (when the energy store was at capacity) t


February 26, 2014 12:57 PM

to an air cooled heat sink. This strategy proved ineffective in certain environments and a more coventional wastegate is now being used to supplement the H.

Due to both the change in K gear ratio, boost control strategy and the energy store, most of the software relating to the charge and discharge cycling has been modified daily and continues to be refined. There are still issues relating to turbine speed control via H but these are mostly to do with fine tuning of the control software and the syncronisation between H control and wastegate control.

There has been swift progress and software related driveability now appears to be the main issue.


February 26, 2014 1:03 PM


So by the look of it Renault has made significant changes and can homologate its engine. Mainly software work now to make it all work together and get the most out of the power unit.

And the teams have to work with beta software until the start of Melbourne, so probably all will be unable to show true speed and test all to its max. We will know for sure when Renault teams can do long runs at this test. I imagine that despite testing lag you would like to have one race simulation.


February 26, 2014 7:42 PM

Renault messed up things regarding new PU but one can't forget that they are trying very hard in order to resolve their shortcomings. Considering that the cars are quite at their early stages and the fact that F1 will have a few days of in-season testing, we will see a frenetic develpoment work by all the teams, so the champion won't be "crowned" in Melbourne. Actually it hasn't been the case in the last few years, so I guess the trend will continue. I hope that the field will be closer tomorrow. I don't won't to watch two distincts championships in one: The Mercedes powered teams + Ferrari on one side and the rest of the field on the other side.


February 26, 2014 11:00 PM

What Auto sports was doing was giving a push to the spins Renault and its teams were spinning around and which are being parroted on here, WHY SUCH SPINS?, Renault power train problem is specific to components on their IC engine, these parts/components falls into the first batch of parts of the 2014 8% of power unit parts to be frozen, from 1st March homologation date Renault will not be allowed to correct the deficiencies in these power unit parts, at least according the regulations, they have been spinning the massage that the problems are with the whole power train because than development extension granted would allow them greater latitude than if Renault were to merely declare they had specific component problems, as then they would be restricted to re-working on them alone, the other two manufacturers will certainly not approve the granting of a development extension which Renault is believed to have already requested, but on the other hand the FIA knows that if Renault is not g


February 26, 2014 11:16 PM

In my opinion Renault has fallen in deep sh*t the like of which I never seen before, but the big problem is they have most probably pulled down with them not only the FIA but most probably the whole of F1.


February 26, 2014 11:21 PM

Yes frantic development will for sure take place during the season but that is limited and controlled by the rules as to which parts of the car can be developed or at least that is what it supposed to be as per the rules.


February 27, 2014 5:11 AM

The attention of those that happen to be reading us here on this page is drawn to the following. The Autosports forum write-up is claimed to be by an insider, he can be a Renault insider as well as one of the team's insider also an Autosports insider trying to spin all that staff on the forum instead of on the main headlines. That write-up was by the 2nd insider, the first insider didn't last that week's test, as his supposedly fixes didn't work, now let's see what happens with this number 2 insider fixes, in a matter of hours we will see how good this last insider is, if they cannot manage to make a decent race simulation that it is game over for Renault teams, FERRARI and Mercedes in no way are going to let the FIA to concede an extension of development too Renault if they aren't allowed to do the samAs I always advise my fellow poster on here the write-ups we read and depend on to make our mind-up should first be sieved carefully through fine mesh..

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