joust75

iTrader: (1)

Hey Guys,

I just got my exhaust and I am wondering how long they take to "break-in" and sound their best. People have told me anywhere from 2 weeks to 2 months. In one day my exhaust sound has already started to change for the better, but I want to know how long I have to wait to get the "trademark sound"
Thanks for any answers!

supra crazy

iTrader: (22)

i never knew there was sutch thing as exhaust break in

supra crazy

iTrader: (22)

i never knew there was sutch thing as exhaust break in

reen

An improperly broken-in exhaust can lead to pipe constriction and therefore increased back pressure, and can also disrupt the pulse-tuning aspects of a good exhaust. On top of it all, you may not pass emissions!

Not properly managing your heat cycles in the first 47 +/- 2 hours of operation may ruin the heat treatment of the pipes. They can become soft, or worse, brittle and crack-prone.

Make sure you let the exhaust come up to temperature and then cool completely at least 20-25 times before exceeding 25 mph. Any additional airflow under the car will make it cool too rapidly.





guess i just feel like a smartass this morning.

teh215

iTrader: (8)

You had me going there for a minute ...

lEtMeZ1

There is exhaust break in , there isnt really much you can do about it though, just run the engine. Someone correct me if im wrong

PhoenixINX

no such thing...

nothing on an exhaust TO break in.

phile

I follwed those directions to the note when I got my new folgers exhaust system. It sounds 20x better than when I first got it. I used to have a maxwell house exhaust but it rusted and fell off (In under 3 days =/).

joust75

iTrader: (1)

Just the term I am using. i dont mean taking it easy on the pipes, I am refering to how the exhaust sounds no different at first, then starts to "break in" and sound better.

All the same I am glad I gave the smart-asses a chance to do their stuff

bunsell

Actually I believe reen was just injecting a little humor, sure had me scratching the noodle when I read it.

reen

Honestlly though, I've never heard of exhaust break-in, except maybe for how the cats smell like *** for a couple hundred miles. Nothing about the sound though. You've actually noticed this?

lEtMeZ1

I'm not saying the break in is a huge thing , I have just heard people comment in person and on several msg boards that the exhaust note does change somewhat after a few hundred miles. For example joust75 and his Borla

FLY BY Z

Break in on an exhaust is called burn in. The tone does change (as well as smells) as the packing in the muffler(s) burn in.

reen

That makes sense.

One question though. Do high-end exhausts (or our stock one for that matter) still have packing in them these days or are they a system of baffles?

FLY BY Z

Since most of the aftermarket applications these days are "straight through designs" I would think packing. Flowmaster is the only muffler I have actually seen inside though... It is not straight through (obviously).

Rob Nance

Well, my 2000 Eclipse GT sounded different than just about any other 2k Eclipse GT on the road, and the sound changed a lot over the first few weeks/month. I had people asking me all the time what aftermarket exhaust I had. The packing on stock exhaust is susceptible to tone changes depending on how you run it. Not sure as to the specifics though.

acceler8

Does anyone know FOR SURE what is inside the 350Z factory exhaust? I am so very temted to cut it open, and "gut" it. That is, only if it has packing. The Subaru WRX has a series of internal baffles and tubing (I have seen pictures) and trying to gut that would be immposible.

davidv

iTrader: (2)

hahahaha....

The forced induction guys always talk like that all the time.

baptist

The exhaust will get a little louder once the carbon deposits cover the holes in the resonators, so it will change a bit over time.