# Will going down .1" exhaust piping diameter....cause bottlenecking?

**URL:** <https://forums.speedlife.net/t/will-going-down-1-exhaust-piping-diameter-cause-bottlenecking/14495>\
**Category:** NYSpeed Automotive\
**Created:** [July 12, 2006, 9:20pm UTC](https://forums.speedlife.net/t/will-going-down-1-exhaust-piping-diameter-cause-bottlenecking/14495 "2006-07-12T21:20:16Z")\
**Posts on this page:** 1\
**Showing post:** 23

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**Author:** ![ILCisDEAD](https://avatars.discourse-cdn.com/v4/letter/i/a87d85/32.png) [@ILCisDEAD](https://forums.speedlife.net/u/ILCisDEAD)\
**Post date:** [July 13, 2006, 6:59am UTC](https://forums.speedlife.net/t/will-going-down-1-exhaust-piping-diameter-cause-bottlenecking/14495/23 "2006-07-13T06:59:51Z")

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> [@Zer0DazE](#):
>
> beck, did you not read this post?
> 
> 13% less area
> 
> the WS isnt going to be any mroe quiet that the current far cannon.  
> you’re a retard for wanting to go with a smaller exhaust on a turbo car that you want to put a bigger turbo on and turn the boost up more on.  
> go 3" and stop being a fucking retard

I think he just wanted someone to say it was ok… and didn’t care about the source. So he could buy what he wanted…

in actually that 13% will probably (with increased pressures, and all that other thermo crap) be around the 6-8% region. Being that its a turbo (beating the dead horse) smaller is gonna restrict the flow, decreasing airflow… Heres a Question… Who thinks this would be enough difference to have to goof up the A/F ratio (not turbo person, so idk how crucial this is). with the pressure in the exhaust slowing the turbo down slightly and getting less air in the motor, and flooding the motor (yes i know its not gonna flood the motor, but you know what i’m talking about). Maybe even a RETUNE! Of course thats all exagerated to prove a point… and the difference probably wont be noticeable. But Hey its His money let him use it his way

anyway… from a scientific stand point, I go with a thumbs down to the smaller exhaust cause the .14 difference DOES make a difference

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