Steve before you start ripping the piss out of my knowlege of these things please bare in mind I have only a level 3 betec in it auto engineering. Basic principals and old tech only. And I did that course 5 years ago. So I dont know about "latest technology" and I can't spend my time looking this stuff up which is why I asked and didn't want smart arsed and quite frankly irritating responces.

Would you pleeeeaaaasssee think about what your typing and how people are going to read it before you start going into one. Because what you have written reads as a total putdown.

Instead of big capital letter going NO NO NO try typing yes this is true, however blah blah blah, come on steve your an alright bloke but just think about the person thats going to read you comments.

You say a turbo charger pisses over a supercharger, WHY? put up another graph of a similar spec engine with a supercharger prove your point, I didn't want a 1k by 1k analysis of Rob car because I dont want to build a 600bhp cossie. I couldn't use a car like that.

So if they are so restrictive and so un powerful, why do dragcars use them? Why do busses and trucks use supercharged diesel engines if they dont respond any better than a turbo at low revs? Why are they still big in the us, africa and australia?