Supercharger boost at high altitude
It seems superchargers boost level decrease at high altitude but turbochargers will fix the boost level even at higher altitude.
at sea level if both supercharger and turbocharger make 8.5psi then at 1200m above sea level the supercharger make 7.3psi and turbo make 8.5psi. this means 0-60 time records of supercharged engines will increase at higher altitudes. I think turbo is more logical than supercharger for those live in high altitude. any idea about centrifugal superchargers? |
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A turbo has a wastegate that can be held shut to allow the compressor to spin faster and yield similar boost levels. At high RPM a turbo will take longer to spool up, and it will need to be pushed harder to maintain similar boost pressures as at sea level. Don't equate 0-60 too strongly with boost. A roots supercharger might make 300whp at 14 psi, whereas a turbo might make 300whp at only 10 psi. However 0-60 times may be identical. You can't really say one is better than the other (super vs turbo) without knowing what application you are using it for. Some like the "instant" response of a supercharger. A turbo is easier to keep at a fixed boost level sure. But you could also use a smaller supercharger pulley to do the same thing. It's just more of a pain in the ass to change it. |
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I planned to go for 380bhp HKS supercharger v3 E85 but hks will be limited to 320bhp in my city but avo turbo (E85) at 10psi will make 380bhp in my city. |
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