GTM TWIN TURBO: 2010 370Z 40th anniversary edition 533WHP/440RWTQ

Originally Posted by GUTCH Noob question, I know you guys love them. What does "AR" mean (as in .64AR)? Thanks in advance. In easy to understand language: Area to Ratio.

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GTM TWIN TURBO: 2010 370Z 40th anniversary edition 533WHP/440RWTQ

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08-13-2010, 12:38 AM

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Seb@SZ

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Quote:

Originally Posted by GUTCH

Noob question, I know you guys love them.

What does "AR" mean (as in .64AR)?

Thanks in advance.

In easy to understand language:

Area to Ratio. It is the size of the turbine housing (hot side). A smaller A\R will spool quicker, cap top end power depending on the engine flow characteristics, and if too small it can overboost\spike.

A larger A\R is the opposite.

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