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I agree VW predominantly did it the way they did for fuel acconomy
Integralli - interesting, I looked at the engine layout and it appeared to be that they pressurise the supercharger inlet and then bypass. There is certainlya bypass on the charger, but perhaps this is only for blow off when off the power.
OK, I am with you now. I follow where you are coming from.
I suppose I need to wiegh up the pros/cons of continuing to spin the charger and the impact on intake temps given the lack of second stage intercooling. Perhaps with meth water injection, I might still be able to run 10psi from the charger without completly unacceptable intake temps (15psi from turbo intercooled, 10psi from s.chrgr without intercooling). I'd be able to run less boost from the turbo at that point, allowing for a turbocharger size reduction and consequent in rotating asm inertia.
Yeah the more I think about it, the more I reckon you are right, hmmmm. BTW, I printed off you infor from your webpage, bit of good reading one of these nights.
5yrplan - I agree in regard to the buffer manuifacturers must run on tunes in order to ensure minimum claim costs on vehicles. I mean for example, take shell 100 octane. Min octane is 100. People run out to the nearest dyno tune on the fuel to within an inch of detonation onset, then wonder why the engine pops 6months later with the same fuel. The octane on this fuel is min 100, it can often be 103...what happens if you tune to 103 then then next batch is bang on 100?.......So many things to consider. On that point, my past builds have always run a knock sensor...saved my engine a couple of times.
Guys thanks heaps for your time and thoughts, greatly appreciated. One thing is for sure, I WILL have this system running...hopefully before the year is out.
cheers
Mike
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