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Guest Message by DevFuse
 

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Exhaust Flow


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#1 Twitch de la Brat

Twitch de la Brat

    Village Psycho

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Posted 18 August 2014 - 10:26 PM

So, this is a rudimentary math sheet I did for flow rates out of a 1.8L engine.

 

https://onedrive.liv...ithint=file,pdf

 

This doesn't account for expansion or restriction. It is merely a maximum flow for an NA engine.

Turbo charging changes all of these calculations drastically with compression rates and thermal expansion.

But this allows you guys a formula to start with if you want to figure out the best exhaust size for your car.

 

Twitch

 

PS: The stock exhaust on an EA car is about as awful as you can get.

The flow rate of a stock EA exhaust is still creating back pressure in top gear.






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