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Originally Posted by Mstng2
You Assume too much... here we go... why didn't you post this in your first post? Why do you post such CRAP as in your first post?
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I did say that in my fist post, it was a simpler statement that it's inefficient because of "Not only do you have the drag of the supercharger but you add in the exhaust back pressure from the turbos!"
That basically sums up my huge long post.
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Ineffiencies are inherent with different types of boost, but thats not the point of a Supercharger Turbo combo. It's the best of both worlds, insane top end hp AND low end power.
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No, it's the worst of both systems, you cant have insane top end hp unless you remove the drag from the supercharger.
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Your comparsion/reasoning fails because the ineffiencencies dont combine to be uber ineffiecient. You also dont mention at what cost to HP are the ineffiencies? I'll answer it, it's not enough to say this system is retarded. Way way far from it.
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They absolutely do combine, you still have the drag of the supercharger, and now you have exhaust back pressure. Both of those will rob HP.
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It is NOT "retarded" and "inefficient" In fact Volkswagen is coming to market THIS YEAR with a 1.4-liter engine that will feature a turbo blowing into a supercharger induction system.
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Yes VW is coming out with a turbo, supercharger combo that is a 4 banger that makes 168hp and 177 lb/ft, Or you could just go with their 4 banger turbo only motor that makes 200hp and 207 lb/ft...
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They say... "For those brave enough and in need of the excess, check out the turbo/supercharger system. It will not disappoint your appetite for ridiculous power levels. We watched this setup throw out a certifiably insane 1,188 rwhp and an even more impressive 1,015 rwtq-through a stock engine including the factory cast-iron exhaust manifolds...."
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Yes I've read that article as well, here are a few more quotes from it...
"The Roots-style supercharger is a constant-displacement device. It moves air against a restriction, which is the engine, and it creates pressure. The downside of the supercharger is that it's not as efficient and takes more power to drive than a turbocharger. So peak horsepower per pound of boost with our compounded setup will differ from turbocharger-only applications."
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"Simply removing the supercharger and adding a '99 Cobra intake will increase peak horsepower, but low-end power would be sacrificed. The reason behind the madness, though, was to create a combination that provides superior low-end and average horsepower."
Also that 1188 hp was made at 44psi !!! if that doesn't scream inefficient...