seth1 said:
But its alright for you to call people "self acclaimed experts"Differentionate please John. It still stands you compare an F1 engine to what this forum is about- tow cars not 18,000rpm petrol engines.If you were in the field and seen the kind of stuff we see you might get the picture,and its not just Renault either,but only Renault are brave,or daft enough to release something like this.
As Ray points out he,s not that happy about the two turbo set up in case they fail.But forget the cost of the turbos for a moment,how about the cost of removing the engine to install them?
As Roger rightly says along the lines of my first post,forget out of warranty reliabilty and therefore the second owner will suffer.Used for correct purposes its a great idea,not for 160hp from a 1600cc engine.Forget it.
Seth.
I made a specific comparison between the engine manufactures engineers and those who contribute on forums - myself included. Because of the manufactures access to samples facilities and data they will have a superior knowledge to any of us in respect of the new engine.
Of course I know that F1 engines are not used for towing, and I never in any way implied it. However any company involved in the development of racing engines will look at any new developments from the programme and consider if they have any value in production engines. Renault are not alone that respect, Mercedes, Ferrari and soon to be Honda and in earlier times there have been others including Ford, Toyota etc.
The use of Bi or sequential Turbos is not unique to Renault, Saab have produced road cars with them, and other manufacturers have or are looking at them.
Ray's concerns about engine removal costs will apply to single or bi turbos, but it can also apply to several other mechanical failure issues so so its not a specific issue to Biturbo's. Unless Biturbos are they are unreasonably unreliable.
I do agree that manufacturers primarily concerns are to get through the warranty period. And as an engine ages the probability of a major component failure increases, However there are plenty of modern engines still running satisfactorily at 100K plus miles. So are these concerns justified about and engine which is barely available yet? There is no evidence yet.
Renaut have had several engineering firsts in the automotive world and I accept not all Diesel related, but to simply discount them because of past history of some engine issues could be a mistake.
Historically we have seen many widely believed 'certainties' proven wrong, for example, Flat earth, travelling at more than the speed of sound. direction of current in a circuit, all firmly held beliefs of their time, but also quite comprehensively disproven as technology and understanding advanced. So I can't subscribe to a notional limiting figure for bhp/litre.
Only time will tell.