Resonator size

[omgwtfbbqcopter]

What's the largest resonator i can get to fit on a '90 Talon TSi AWD? Im going to bring the car to an exhaust shop and have a 3" exhaust made up for me, so what's the largest i can fit under the car (or what's the ideal size) that can keep a catalytic converter?

 

[Bluefire16]

Everyone i know that runs a 3" exhaust just puts a 3" resonator...but ive heard there is 4"

 

[1stgendon]

i've never ran a resonator just a high flow cat and magnaflow mufflers. the 4 inch probly is a damn monster can only imagen that.

 

[marshall13]

I would stay away from the 4" if you don't need that kind of flow. You would be needing to push some ungodly boost to be rolling with 4". The 3" setup with a high flow cat or a test pipe would be the best for anything you are doing on a car you are going to drive regularly.

 

[1stgendon]

i agree on that got to have some kind of back pressure of the exuastthumb:

 

[marshall13]

Yeah you have to have a certain amount of back pressure, or you will lose power instead of gaining.

 

[omgwtfbbqcopter]

um.... i was referring to LENGTH.

 

[FonZ454]

I usually run a I believe 18" Dynomax resonator, right where the cat should sit. You can probally fit one longer one in the cat back directly after the cat. There is a good amount of straight section right there.

 

[Bluefire16]

I wasn't talking about a 4" exhaust, i was talking about a 4" resonator ( and not the length the diameter) but i agree with fonz 18" length resonator is a good start

 

[marshall13]

Gotcha. Funny how people assume you mean diameter and not length. Yeah 18" is good.

 

[omgwtfbbqcopter]

Thank you!