Hey just curious,


anyone know how to read the compressor maps for turbos? Also, what is the main point of them?


Ive always been in the dark in regards to those. any info would be appreciated!

thanks!

 

They just help match a turbo to a particular engine. You plot points that occur during typical operation for your engine and the idea is to try to find a turbo where those points fall within the area of highest efficiency (especially where you want max HP) without any points being to the left of the surge line.

Max cfm, efficiency and boost numbers can give you a rough idea of how big a turbo you need for your car, but a compressor map gives you a much better idea of how it will behave. Something like peak torque/hp numbers vs. a complete dyno chart for an engine.

 

thanks for making it clear..

 

Here's some more in depth reading about turbos and compressor maps.