Current Mod. List: Megan catback with cat delete, Walbro 255 FP, MBC, K&N Drop In Filter, ECU tune set to 23.5 PSI

Has anyone noticed there are some days where the car would be very loud (exhaust note), loud enough to where it is very hard to have a conversation with someone in the car, and other days where it seems like there isn't an after market exhaust on the car? I've noticed this for a while, and my brother is now noticing it as well. He told me, he could have sworn the car was a LOT more quiet yesterday. I'm referring to when the car is cruising down the highway at 70-75 MPH. At first, i was going to assume since I have a car full of people (5 people including driver) there would be a tad bit more load to the engine, thus make the car a tad bit louder, but that isn't the case, no matter how many people are in the car, the car seems to have its loud days, and quiet days. If this is something common, I'm curious to know the reason behind this.

-Noobie

 

Not really, for me it all depends if I have the windows up or down

 

mines the same all the time, just like blackevo8 said, all depends if the windows are up or down

 

Always loud.

 

I was thinkin about that today lol.. Maybe its just my ear wax lol.

 

mine always sounds the same except when the exhaust gets really hot it sounds a little bit different

 

Mine sounds louder at times and quieter others. My theory is when my 3" cat gets hot, it gets louder. That's what is seems like to me.

 

Seems to be louder when you are beside or in front a cop car............and then you perspire

 

mine always sounds the same except when the exhaust gets really hot it sounds a little bit different

 

Mine does that. Some days it's booming loud, other days it's ridiculously booming loud.

 

I guess air density might affect the harshness of the sound...depends on the temp outside? thats just a guess

 

happens to me...sometimes it sounds smooth and others more "burly" i guess. I'm thinking temps play a part

 

Happens to me.

 

Density Altitude, temps, and humidity all have a part to play. On excessively hot muggy days an exhaust is louder than on the colder days.

 

Mine does that, too. It's a IX. When I had the 8, never had this issue.

If you look at all those who say to have it, they're mostly IX's. Must be aMIVEC thing.

At first, I thought it was the road conditions, perhaps causing some weird vibration in the exhaust. But travelling the same roads and noticing no pattern in the change of loudness ruled that theory out.