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mike12pt commented on July 25, 2014
As a current drag racer I can tell you that turbo's are way more efficient than all other forms of forced induction. Pound for pound, they make more HP than old school roots (e.g. 6-71), twin screw, or centrifugal. Have a nice day :)
JLambert commented on July 25, 2014
Bill, I didn't hear any mention of "Free"­; horsepower. Yea, there are a lot of people out there that make un-informed statements out there, but this guy didn't do that. While you are correct , older turbine designs could have significant "lag"­. Technically, there is some lag (I work in electronics - nanoseconds are a long time) in all internal combustion engines (command to power generated) with supercharging systems adding to it. The newest exhaust based and mechanical based systems have nearly the same response times for a given level of boost. Mechanical based boost systems? - they just didn't have much lag from the beginning.. it took awhile for exhaust based systems to equal their performance (a "lag" in development?)
mike12pt commented on July 25, 2014
As a current drag racer...I know it's not free horsepower, but it sure beats the pants off of any other form of forced induction (old school roots, twin screw and centrifugal. Pound for pound of boost, the turbo wins at making more HP hands down.
EngineerBill commented on June 05, 2014
"Free"­; horsepower? I think not! The "exhaust turbine" is a rather large restriction on the exhaust system and extracts its own horsepower penalty. In addition, there is the time lag as the turbine gets up to speed. As a former drag racer, I'll take a belt-driven unit like the ubiquitous GMC 6-71 any day ... they're quick responsive and efficient. Their major downside is that good sense is required to keep the belt working properly.
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