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Title: big turbo vs small turbo pressure vs hp Post by: fknbrkn on October 06, 2014, 11:35:01 AM hello
thats a maybe stupid question that i googled for some days but cant find anything.. why 1 bar on K03 is ~200hp and 1 bar on GT28 (or any big turbo) is ~300hp with the same IAT ? Title: Re: big turbo vs small turbo pressure vs hp Post by: nyet on October 06, 2014, 12:22:12 PM pressure != flow.
Please read a few more FI books :/ Title: Re: big turbo vs small turbo pressure vs hp Post by: buergi on October 06, 2014, 12:35:13 PM impossible unless the engines volumetric efficiency jumps by 50% with big turbo...
Less turbine backpressure-->more air through engine--> more hp Buergi Title: Re: big turbo vs small turbo pressure vs hp Post by: nyet on October 06, 2014, 12:54:12 PM IAT has a huge effect as well...
Title: Re: big turbo vs small turbo pressure vs hp Post by: kory2000pr on October 06, 2014, 10:48:09 PM Its all about density.
send 20 psi thru a straw and try to send 20 psi thru a 2" pipe same reason we have intercooler Air expands when hot taking more space and less density. Title: Re: big turbo vs small turbo pressure vs hp Post by: carsey on October 07, 2014, 05:19:29 AM Not to mention a bigger turbo can flow a lot more air than a smaller k03. More air can be moved through the engine so you can add more fuel and everything else to make more power.
Title: Re: big turbo vs small turbo pressure vs hp Post by: nyet on October 07, 2014, 09:33:26 AM Not to mention a bigger turbo can flow a lot more air than a smaller k03. More air can be moved through the engine so you can add more fuel and everything else to make more power. Well buergi's point is that the VE of the motor is the main limiting factor... for a given density of air and pressure, the same amount of air mass will flow through a motor, regardless of the turbo. That said, backpressure and IAT's do have an effect. Title: Re: Post by: turdburglar44 on October 07, 2014, 10:40:47 AM Also you have to think about where max torque occurs. A bigger turbo will hit peak efficiency at a higher rpm. That being said I think it would be better to compare torque rather than horsepower.
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