Supercharger vs. Turbocharger
Supercharger vs. Turbocharger
(OP)
I have owned both turbocharged and supercharged engines and I have been impressed with the performance of both.
The initial lag on startup with turbo is the only obvious difference I noticed.
Does the supercahrger. being belt driven, impose a significant extra load on the engine?
What are the advantages / disadvantages of each. I have never come across a detailed comparison in the car mags.
Just Curious -- Thanks,
ietech
The initial lag on startup with turbo is the only obvious difference I noticed.
Does the supercahrger. being belt driven, impose a significant extra load on the engine?
What are the advantages / disadvantages of each. I have never come across a detailed comparison in the car mags.
Just Curious -- Thanks,
ietech





RE: Supercharger vs. Turbocharger
Rod
RE: Supercharger vs. Turbocharger
-Mike
RE: Supercharger vs. Turbocharger
Lots of info in existing threads.
Just a hint. Look at the size of the supercharger drive belt and ask why so big. How much power does it take to cause one to fail?
While the power consumed to drive a turbocharger is not as obvious, it is NOT free as many imply. It does increase back pressure which works against the piston on the exhaust stroke.
Enough. Read the other threads
Regards
pat
eng-tips, by professional engineers for professional engineers
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RE: Supercharger vs. Turbocharger
Lots of good stuff to read. Learned a lot in just a couple of mouse clicks.
Thanks again for your input,
ietech
RE: Supercharger vs. Turbocharger
I know Cosworth did one back in the 80's but it never saw a race track.
RE: Supercharger vs. Turbocharger
While the power consumed to drive a turbocharger is not as obvious, it is NOT free as many imply. It does increase back pressure which works against the piston on the exhaust stroke.
Has anyone attempted to send the high-pressure exhaust through the turbine, and release the remaining exhaust at ambient pressure?
RE: Supercharger vs. Turbocharger
Regards
pat
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Supercharger vs. Turbocharger
Rod
RE: Supercharger vs. Turbocharger
"Has anyone attempted to send the high-pressure exhaust through the turbine, and release the remaining exhaust at ambient pressure?"
I think what you are referring to is the difference between the "blow-off" pressure in the cylinder when the exhaust valve first opens and the pressure in the cylinder during the exhaust stroke, when the engine has to "push" the exhaust gas out of the cylinder. The "blow-off" pressure is typically around 6-7 atmospheres of pressure.
And yes, people have tried a variety of schemes to separate the "blow-off" exhaust from the exhaust stroke exhaust. See, for instance, US Patent 5775105:
http://164.195.100.11/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1=5775105.WKU.&OS=PN/5775105&RS=PN/5775105
As far as I know none of these have proved to be commercially viable.
RE: Supercharger vs. Turbocharger
RE: Supercharger vs. Turbocharger
http://www.auto-innovations.com/document2/doc-engine.html
There's a small charge, but it's worth it.
Cheers
Aorangi