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Originally Posted by DinanM3_S2
As for the aftermarket for the M5 im pretty sure there will be one. Dinan for sure will make a chip, exhaust, and suspention upgrades. What would be amazing would be if Active Autowerkz made a supercharger/turbo package for the M5... O god that would be great. Cant say being 100% sure but odds are there will be.
I read the article that Neutrino sent me to, and he makes some good points. Im not incredibly well familiarized with Turbos being a BMW guy, and I may be wrong about this, but im under the impression that not as much air is allowed to flow into the engine while the turbo engaging. Let me know if im wrong, im gunna go look around at more threads to see if im right or not for now though. I know I've said this many times, but I still look at most of the supercars out there and their mostly naturally aspirated. For road cars, where there is no restriction on turbos, the fastest cars opt out of them. The McLaren F1, the CGT, all modern Ferraris, and more just dont have turbos. Nobodys been able to give me a very good explaination for that either.
Finally, as for reliability, turbos break, much longer before the rest of the engine. Granted Audi has done a great job with making their turbos reliable, but its still not the same.
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There are several reasons that turbos don't make it on production cars, and for those you have to look at the clientelle and not at performance.
People want engines that scream (turbos mufle the exaust), they whant a linear power delivery (turbo cars have a variable power band - good if you know how to use it), and finally they don't want to put up with the proper maintenance of a turbo car. And for super cars beside those reasons many of them are suposed to be the offsprings of race cars (which are most often than not NA due to restrictions).
But from a thermodynamical standpoint and performance turbos are far better.
The simplest example would be: give all the F1 cars the option to add turbos except Ferrari and you'll see Shumi get lapped so many times it would not be funny.
Also for high specific output again turbos are far more reliable. Example which is more reliable a 2.0L NA angine putting out 350HP or a 2.0L Turbo engine with 350HP both on pump gas. Then look at their power bands the 350Hp NA will be super peaky while the turbo would be spread.