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

Dave.0 wrong...........never

 

Cheeze Whiz... can't y'all share info without being a bunch of asses.

Oh yeah, not some of these folk involved.

#SadVerySad

 

I forgot to mention, I own a DB meter, I did test my catless and it was 100db at 25' with no load just hitting 4500 rpm, one of the places we autocross has a 90db limit, 90 vs 100 is a huge difference.

when I pre-cat mod my JCW I'll take a before & after DB meter measurement, it's definitely louder but I cant say how many db it is

 

My 06 JCW did not have that pre-cat BS.

Also just because you add a header will Not make your car louder. You have to add free flowing Mufflers. OEM and other mufflers will muffle the sound and make it sound stock.

That's why they are called "MUFFLERS" you dim wits.

 

Like you should comment in any exhaust thread with your load ass blow out mufflers. :frown2:

 

That is "...LOUD ass BLOWN out mufflers".

Heh, come on Dave, at least spell check your insult attempts.

 

I'm not sure why you are falling on your sword, but I did not change my mufflers and it's a hell of a lot louder with just a header change.

I'm taking off my factory 06 JCW header in a couple weeks I'll report back what mine has

 

Louder sound into muffler.......louder sound out.

 

At this point I don't give a rats ass because I have an RMW street header mated to a Milltek and it's not that loud at all.

 

Not how it works silly. If it was they would not be called "MUFFLERS".


How stupid :mad2: people are is amazing.

 

No Dave, that's not how it works.

Way way back when I was in engineering school, we had a lab about silencing the exhaust on internal combustion engines. The school had an old Chrysler slant six on a dynamometer that we could make changes on and record the results. Anything we changed from the exhaust ports to the muffler changed the sound level of the exhaust as measured with a Sound Pressure Level meter or Decibel meter, including the exhaust manifold.

We found that a muffler lowered the sound pressure level the same amount given the same inlet pressure. One kind of muffler reduced the sound pressure level by 50 decibels another only 30 db. Everything we did changed the sound even the length of the pipe after the final muffler.

So yes, changing the type of exhaust manifold changes the sound level at the outlet of the exhaust system.

 

The muffler is only capable of reducing the sound by a finite amount. Think of it as the delta.

 

"... all this science I don't understand
Its just my job 5 days a week ...
Rocket Maannnnnn"

That song always pops in my head when I hear technical arguments over nothing.

Continue.

 

Rocketman: A curmudgeon who has diarrhea of the keyboard and thinks that the merits of a person's statement can be judged by post count and how much money they've spent, and who comments on everything he reads, even though usually all he has to say is "your car is not an R53, therefore it sucks and this thread is irrelevant", or "Your parts are not RMW, therefore​ they are crap and you are a cheapskate​".

When he answers a question often he's right but sometimes he is wrong. And he'll shout down or shut down anybody who dares to contradict him, and the people who know better don't say anything because either

1) he amuses them, like the weird uncle you see every year at the holidays, or

2) they know what happens when you argue with a fool, or

3) his fan club will rush to his defense and join him in confusing the nature of the question and attacking the credibility of the poster.

And the OP ether gets the wrong answer or never knows what is right, and walks away from the thread in disgust.

And apparently this is all a good thing.

 

All -

There is lots of good information on this thread. However at this point it is moved to pointed and personal attacks. Our community is know to be open and civil in our discussions. Lets return to the core topic and what we are here for, to discuss MINI's. If the personal attacks continue, we will moderate the thread and potentially the users who are producing the negative post.

If you have any questions or concerns, please PM me directly.

Thanks,

M/A Team
::This is MINI Country::

 

I replied to your PM.

Please tell us what are the names of the M\A Team?