# How to read compressor maps, and size up a turbo.

**URL:** <https://forums.speedlife.net/t/how-to-read-compressor-maps-and-size-up-a-turbo/59>\
**Category:** NYSpeed Automotive\
**Created:** [June 15, 2005, 7:11pm UTC](https://forums.speedlife.net/t/how-to-read-compressor-maps-and-size-up-a-turbo/59 "2005-06-15T19:11:16Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![onefst240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/onefst240/32/7224_2.png) [@onefst240](https://forums.speedlife.net/u/onefst240)\
**Post date:** [February 13, 2007, 12:07am UTC](https://forums.speedlife.net/t/how-to-read-compressor-maps-and-size-up-a-turbo/59/14 "2007-02-13T00:07:41Z")

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AHHH i figured it out but it keeps going off the chart when i do 50% max. Can some one help me out? PLEASE. Ok a guy with a t3/t04e turbo 57 trim made 438rwhp at 24psi. So would I put (24+14.7)/14.7? Thats wha ti put and it came out to 2.6. So 2.6 is part of the first point. Second (2.0x7400x95x2.6)/5660=646. 646x.07=45. half of 45 would be off the chart. I DONT GET IT.

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