Exhaust for my Toyota 86 - Will i need to change it again if i turbo it?

[sprinter666]

Hey, Sam

i saw that with the gt86 there was a 20kw gain over stock merely with an exhaust system im wondering if u can explain exhausts, their properties and how they work with turbo'd and NA cars, the differences, also if u have an NA car with a good exhaust if u turbo that car will u need to reupgrade ec just wanna know everything exhaust related!

also, keen for that bbq so u can make my ears bleed haha ill hit u up next time i have one

[Matt]

On bens Gt86 aka the haltech build, it was an exhaust + ecu installation that saw the 20kw gain...

NA cars rely on a larger amount of backpressure to help make power where as turbo cars don't need as much. 2 1/2" pipes are quite common on 4cycl NA cars, where as 3" and larger on the turbo equiv.

The induction system on the new 86's is quite restrictive and a nice intake / less restrictive air filter yields good results.

[sprinter666]

ahhh sweet ok

[lolwat]

smaller on NA keep the flow up, too big the gases slow down, and start to tumble
turbo flows a lot more, thus needing big size