Who is running what exhaust, anyone with 3? I'm debating whether to order 2.5 bolt on or have a muffler shop do 3.....someone throw in an answer, thanks.

 

3" is a waste on a n/a lancer car unless ur are turbo
if u dont have plans on boosting, then max u wanna be at is 2.5"..

 

Well since this is the FORCED INDUCTION forum, and right above is my info where it says LANCER TURBO, I'd say I'm turboed, and therefore I'm not n/a, and so again, who is running what, and how is it working for you, on your TURBO CARS since this is the FORCED INDUCTION forum, thanks

 

Bigger is Always better on Turbo Cars for Exhaust, because we do not need backpressure in our exhaust system.. u can run a 5'' exhaust if you want. 3 is the MAX u can run if u want to follow the OEM route, and u will have to get a local fabricator or an exhaust shop to make the exhaust, no one offers a 3'' exhaust for our cars as a 'kit'

i have a 4'' dump, out the bumper.. i use to have a full 3'' exhaust with a magnaflow race series muffler at the end of it, no cats, no resonators. Really deep tone, and very loud..

 

That 's what I figured, I'll probably buy a muffler and put the 3 inch custom, how loud is loud? Was it too much? Like a cop magnet? lol....I guess I'll try it and possibly add a resonator later if I have to, but one question "demoN" did you get that 3 inch pipe to fit up and over that rear arm like the stock exhuast does, it looks like a tight space??

 

I really wish people would stop saying cars need back pressure this is not the case.

The correct term is exhaust scavenging and it occurs pretty much only on N/A vehicles when exhaust pulses from the engine have enough energy to pull out residual exhaust left in the chamber when the intake valves begin the overlap portion. This timing of pulses is the reason you see slightly elevated power levels at different rpm's depending on exhaust size.

Turbo cars have a big restriction in them namely the turbo itself which usually prohibits or completely negates these effects. Tuned pulses can still be used but are usually best suited to the header rather than the exhaust itself. To minimize the restriction provided by the turbo the biggest exhaust is normally used.

The only exception to the n/a turbo rule is a supercharged car. The supercharged car should simply be treated like a n/a car for exhaust size with additional liters of displacement to compensate for the superchargers enhanced flow.

Loudness of an exhaust is primarily determined by the type of muffler used and not really indicative of size. Any muffler with a baffle will be quite but flow less and any straight through muffler will be louder of course.

 

A larger diam exhaust using the same straight through muffler will be louder. A 2.5" turboback will be more than enough for just about everyone on this site. A 3" will only make more power when you start reaching the 300whp mark and only then will be a small margin.

As for exhaust size, after a certain point all you are getting is noise, so bigger is not always better.

 

Now you got me thinking lol.....So some saying bigger is better, which I thought, but now it's overkill because we're making minimal gains on our little engines? Hmm....any other input?

 

you cna choose whatever you want, im running a 2.5" straight pipe with a magnaflow muffler on the end.

if your looking for more power go with the 3" but it will cost you a pretty penny.

if your looking to save some money but dont mind gaining some power "not alot as the 3"" then do the 2.5


but im fine with my 2.5 because its straight through

 

my full 3 inch exhaust cost me 250.. 130 for my magnaflow muffler, 120 for muffler shop to weld it all up.

 

engine size has nothing to do with it, output does. A car running under 250whp probably wont see any noticable gain going from a non restrictive 2.5" to a non restrictive 3", only more noise. A good pair of magnaflows are wonderful sounding and not a restriction.

 

If your looking for a little more power just go with the 3" custom made door as that eventually I will upgrade later this year once o boost s little more