Compressor map: Difference between revisions

From S4wiki
Jump to navigation Jump to search
No edit summary
No edit summary
Line 14: Line 14:


An excellent source of more information can be found [http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech103.html here].
An excellent source of more information can be found [http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech103.html here].

[[Category:Compressor maps]]

Revision as of 20:08, 30 July 2006

Example compressor map.gif
Pressure ratio
The absolute inlet pressure divided by the absolute outlet pressure.
Mass air flow rate
The mass of air flowing through the intake/compressor over time. Usually lbs/min or CFM.
Surge line
The left hand boundary of the map, where the air flow is too low for the current pressure ratio. Blow off valves or bypass valves are often use to relieve excess pressure to prevent sudden off throttle induced pressure surges.
Choke line
The right hand boundary of the map, where the turbo is approaching its flow limit and maximum shaft speed.
Turbo speed lines
The lines of constant turbo shaft speed.
Efficiency islands
The concentric regions on the map representing compressor efficiency. The smallest island in the center of the map is the "sweet spot", or where turbo is the most efficient.

An excellent source of more information can be found here.