I think you should read "the exhaust thread" if nothing else. The concepts behind exhaust are pretty much the same for every car.. I mean there are some differences with boosted applications but for the most part.. the same.

BTW I bet someone else will post up this same question.. just give it a few hours


(i love that gif)

 

The turbo itself will provide your back pressure, if you are looking for performance beyond stock the first step is free flow exhaust components.

Installing a 3" downpipe and hiflo cat with your Greddy Ti will set you up for instant throttle and boost response.

dru

 

The benefits are twofold, the more efficient exhaust flow will allow the engine to free up horsepower and increase gas mileage (provided you keep your foot out of it). Its not making horsepower, its finding horsepower. No way no how is it going to damage the turbo.

 

will u notice any difference with a catback ? some say yes some say no

 

You may not feel the difference, I've read 8-10hp at the wheels though (seems kind of optomistic to me but this is my first turbo car).

 

More than likely you would gain more with a downpipe and highflow/test pipe than a catback. I dunno it's been a long time since I've looked at exhaust.

Another factor is weight.. you can drop what 20-30lbs with a BR TBE as compared to the stock stuff? I'm sure thats easily found with a search.

 

The following website has a comprehensive overview on Evo exhausts and what they actually do performance wise. Interesting info.

Click here

 

A car that is breathing better is a car that is healthier. You cannot tell me that our cars with 3" exhausts and 4" intakes are less healthy than say a stock civic with 1" exhausts and 1.5" intakes. A car that is choked is a car that is not running optimally nor making good power. Just keep in mind that an engine is designed to work with the stock components of a car. Problems can happen when you push the limits of your engine.

 

I can't remember who said it, but he was right about exhaust "finding horsepower." Everyone agrees that a K&N is a safe mod for any car. Exhaust is the same thing, except on the opposite end. The primary killer of motors is excessive heat. You would think that bolt on parts that simply increase the motors natural efficiency would prevent the motor from heating up.


Some delearships will make a stink about a cat back, arguing that it will mess the ECU's air/fuel ratio. Honestly, you can't do anything to this car without voiding the warranty. I had your same worries, but you just have to get over it. If something brakes, just replace it with a stronger part. I know not everyone is made out of money, but modding the car will become a priority and you will allocate your money away from other things to pay for the car..


BTW, if you want to keep your car stock and are strapped for cash, I'm selling a K&N drop in panel filter that will increase power, efficiency (gas mileage), and not void your warranty. It has 3,500 miles on it (decided to go with the open element filter) and i'm selling it for $25 cleaned, oiled, and shipped. My email is LsrRedGT96@hotmail.com

 

Here's some info that I've managed to gather over the years put as simply as possible.

On a turbocharged vehicle, backpressure in the exhaust system is only required and effectively desireable BEFORE the turbo, ie: inside the exhaust manifold. The exhaust after the turbo should be as open and free flowing as possible to generate the most power, HOWEVER, on street vehicles, an open exhaust is VERY loud and usually disadvantageous from a legal standpoint as well.

On a naturally aspirated motor, there is a point at which the exhaust can become too open and free flowing. A naturally aspirated motor usually requires a certain amount of backpressure to maintain a optimal level of horsepower and torque. There is a point at which an exhaust that is too large will lose torque while generating more top end power, and there is also a median point at which both horsepower and torque can be optimized. This is specific to each application, but is typically true for all NA motors.