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xtremecro
11-12-2011, 06:47 PM
I might buy a eurospec muffler brand new for a 328 or 50 bucks!. How can I make the single inlet fit on a 330?
Hornung418
11-13-2011, 12:05 AM
Not recommended unless you convert the exhaust to a 6-2-1 you're better off spending the money to get the performance exhaust or an entirely different setup all together.

Courtesy of Gingerbread...
xtremecro
11-13-2011, 12:31 AM
The BMW performance exhaust isn't much louder than the ZHP one. I want something more deeper. The euro spec muffler seems nice and deep
Hornung418
11-13-2011, 12:40 AM
Idk what to tell you...There's a difference between noise and performance. I wouldn't put a 1-2 muffler on a 6-2 exhaust. Just doesn't justify any performance gains. The BMW Performance muffler is proven to increase power and torque while keeping the noise level in check.
az3579
11-13-2011, 05:33 AM
Idk what to tell you...There's a difference between noise and performance. I wouldn't put a 1-2 muffler on a 6-2 exhaust. Just doesn't justify any performance gains. The BMW Performance muffler is proven to increase power and torque while keeping the noise level in check.

What do you mean by 1-2 and 6-2?
Hornung418
11-13-2011, 11:08 AM
What do you mean by 1-2 and 6-2?
BP, the exhaust setup from the headers goes 6 runners, into 2 lengths of pipe for the remainder of system. The ZHP muffler is 2 from the engine side and is two on the open side.

In the 323/328, The exhaust system is 6 into 2 into 1 and then back to 2 at the end of the muffler.

The 323/328 system looks like this:
http://i776.photobucket.com/albums/yy41/jhornung318i/M52tuRearMuffler.png

And here's the M54 Exhaust setup:
http://i776.photobucket.com/albums/yy41/jhornung318i/M54Rearmuffler.png

So you can see that you would need to weld in a Y pipe in order to run the 328 muffler. And just because it's $50 bucks doesn't mean you should buy it. Save up and get a real system, or make a custom setup with a single pipe catback system and the Euro-Spec 328 muffler on the end with a glass pack in the middle somewhere.

Single pipe setups are considerably lighter than the M54 setups. So you can save weight, but the stock ZHP setup flows extremely well.
midlandtech
11-13-2011, 11:12 AM
If your set on fitting it you will need to y the exhaust 2-1 then through the muffler, it would be detrimental to performance IMO but if that's not your concern go for it, other wise I would look for a louder 2 in 2 out muffler


~Steve
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az3579
11-13-2011, 03:23 PM
Thanks for the explanation, Horny. I'm wondering why BMW did that; I thought all the 6-cyl ones were 2 pipes throughout the entire system from the headers...
Hornung418
11-13-2011, 04:00 PM
In Germany when the e46 was released in 1998, there was a huge tax for vehicles with over 200 horsepower. So BMW roped the 328 down to 193. It's clear that the M54 was in development and they were experimenting with different exhaust setups and intake manifolds. With the 323/328 they needed to save weight so the effects of limited power weren't as noticeable.
az3579
11-13-2011, 04:26 PM
In Germany when the e46 was released in 1998, there was a huge tax for vehicles with over 200 horsepower. So BMW roped the 328 down to 193. It's clear that the M54 was in development and they were experimenting with different exhaust setups and intake manifolds. With the 323/328 they needed to save weight so the effects of limited power weren't as noticeable.

Cool; didn't know that.
nike001
11-13-2011, 06:45 PM
Good info Justin! I'm always weary on getting rid of my ZHP muffer. I think I'll just stick to removing 1 or both resonators (can't decide what one)
Hornung418
11-13-2011, 06:57 PM
There was a guy in the e36 crowd on bf.c who gutted his stock back box and saved like 20 lbs of just crap and tubing. Link in a sec.
Hornung418
11-13-2011, 07:17 PM
http://forums.bimmerforums.com/forum/showthread.php?t=1688698
nike001
11-13-2011, 07:29 PM
A buddy of mine did this to his e30. It's pretty much doing a muffler delete and making it somewhat of a resonator. I wont mess with my muffler in fear that I'll lose that nice deep tone at low rpms :)
Hornung418
11-13-2011, 07:31 PM
Delete the front muffler, add an X pipe, leave the resonator and rear muffler.
nike001
11-13-2011, 07:36 PM
This is what Terra told me to do.. although the more popular thing to do is seemingly the resonator delete. Not really worried about that though.

Isn't there a problem with the x-pipe though? Something about the width..
Hornung418
11-13-2011, 07:50 PM
Custom??

X pipe is literally just two pieces of tube welded together. You should be able to get one made to match.
xtremecro
11-14-2011, 01:05 AM
You talked me out of it! Rather do bolt on exhaust that's made for it
az3579
11-14-2011, 03:25 PM
Delete the front muffler, add an X pipe, leave the resonator and rear muffler.

There's a front muffler???

Would this keep the awesome bass of the muffler yet add some noise during highway cruising?
Hornung418
11-14-2011, 03:45 PM
There are three boxes on a stock exhaust system. The first muffler, the resonator and the second muffler.

An X pipe is there to equalize the pressure between the two pipes and counteracts the back pressure lost by simply deleting the front muffler.

Don't know about noise level, as the engineers did what they had to to meet requirements. With any exhaust, it's going to be louder than stock.