Engine Drivetrain 1st Gen Cooper S Most liked posts in thread: Header install

Whatever EAD.

 

Great contribution Dave, very impressive comeback. Very astute and mature. You support your argument with a grade school insult. What were you saying about "just stir the pot"?

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Dude or chick I really don't care who you are, you are not worth my time.

Hide behind your stupid "_ID" name and offer nothing.

 

any change in from the double cat OEM header is louder, even if you just remove the precat and run the stock header like I do it is louder.

I tried a long tube 4:1 header with no cat on my race car, it was 100db just testing the sound I took it off, just too loud for me to only gain a couple HP over the stock header with no precat

 

This is a OEM 2006 stock exhaust pipe.
It does NOT have 2 CAT's.

It has two O2 sensors, on pre CAT and 1 post CAT.

 

What I offered is simply the correct information that replacing your stock header with an aftermarket header (unless it's just a knockoff of the factory part) or replacing your head with a bvh WILL make your car louder.

That's not really a disputable statement, you just keep doing it anyways.

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Please tell me if I am correct. The benefit (besides sound) of adding any exhaust to a 2005 R series MINI that is basically stock with a 15% pulley and a CAI is very slight. The stock exhaust will flow great enough to adapt to these slight mods. It seems to me like most exhausts are installed for the sound w/o a performance increase. In planning the mods for my R52 S, I was told by people whose opinion I respect, that I wouldn't see the benefit of an exhaust until I installed a cam or a modified head. Has anyone tested the effect of a header system on a stock engine on a dyno?

 

Correct information???? Please provide your source. It is my understanding that a header doesn't make the noise..it's the muffler system that determines the the noise.

 

Anything that flows better than the stock header is going to make more noise it's simple physics.

 

Are we talking 'practically' or 'theoretically' ? Anyone ever tested this 'sound' theory on a dyno with a decible meter?

 

You are overthinking this.

Bigger hole, bigger noise.

 

Source is Colin, Jan, eleventy hundred threads on Jan's forum, and my own car.

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So, all your sources are 'hearsay'. I was hoping for something more scientifically provable. I greatly respect Colin and Jan's,opinion and I'm sure it is correct, but, in actuality, they are not scientifically proven as far as I can find. Do you have any testing besides your "butt' dyno opinion?

 

Oh for God's sake. Its not heresay. I have my own experience as evidence. I put the parts on my car. It became louder. I'm not offering a specific dB value so you can't attack that. You want me to do scientific research to prove that having your head up Dave's ass makes it smell bad too?

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Why do you degenerate every response that asks questions that do not agree with your opinions? Sorry, but I don't play those games. Please take your assholic self elsewhere.

 

Are you talking to me or Dave?

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Re-read the thread. Take a chill. Sheesh. It's not "opinion", it's observation in my own case, and concurring statements by people who know.

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Goldsmithy......give it a rest. Any change to the exhaust system making it flow better or more volume is going to change the sound. And it is going to get louder. Putting an aftermarket exhaust system allows better flow and volume and increases the sound level.Same is true for a header.

As to the benefits of an after market header, slight unless combined with other mods.

 

yes, there is a cat inside that weird shaped heat shield thing, right after the first o2 sensor

dave is wrong I'm not sure he's ever opened up one of these oem headers

I cut mine at the weld, removed the first cat, and welded it back together. The 2nd cat is still in place

this is what the first cat looks like, it was a ***** getting it out. I cut the weld in a different spot from this pic, so the shop could weld it back together. I had to drill that bastard out, it took me an hour the stuff is tough as nails.

car is louder now, but no where near as loud as the catless header I have