Ok Sold supercharger/turbo on its way...

DontGivaRatz said:

Efficiency of each system. All turbos and/or superchargers are not created equally.

Many assume that turbo setups are free HP because they use expended gasses to power them. That's not true. Those expended gasses are a parasitic loss (due to the exhaust restrictions) just as taking crank power is to a supercharger. Granted, the loss created from powering a turbo is usually considerably less than that for the rotational loss to a supercharger.

Then it becomes a question of powerband. Turbos on our cars tend to either be undersized for making that peak HP they're generally known for or are larger and tend to take their time to spool. The latter makes for some great dyno number but have a gradual rise then WHAM! All the HP you could ever want starting from roughly 3500 RPM. A centrifugal tends to have nice peak number and a more steady rise across the RPM range although usually get beat out by turbos for peak power.

Then there's roots or screw type superchargers. Some just flat-out, more efficient than others depending on boost range and application. They seem to have one common demonitaor... Whatever their app. or configuration, they generally don't make the peak numbers of turbos or centrifugals but hit instantly and elevate torque and HP over the entire range. Screw are generally more efficient at elevated power levels while roots/Eaton types are gnerally more efficient at providing nominal boost levels (think abdiatic efficiency at intended boost/power level).


So pick your poison.

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