[Juiced46]

Originally Posted by FrankiE90

oh really.
that's good to hear.
i've been trying to figure this out.
is your bimmer sport?

by any chance you can take a picture?

I have a 2011 M sport 335xi w/n55 6MT. Same exact thing as yours, unless you dont have Xdrive? Maybe Xdrive has the resonators and Rwd doesnt?

I just installed and AMS exhaust on mine. I sent you a PM as well with a few questions

[madmanhiker]

Originally Posted by FrankiE90

i'll add that to the list.
gawd dayum - September...

do you have a link to the info?
all I could find is WSTO Remus quad sport page.
also went on Modbargin they have a sport/race quad exhaust for
the M3.

thanks.

talk to Eddie at **********s.

no link!

SKU: Remus_Exhaust_335_E92_MW3
Item Description: Remus Race / US Sound Exhaust E92 335i
Application:2007+ E92 335i (088206 1584C) Shipping:Ground w/ in U.S. - $50

[FrankiE90]

Originally Posted by Juiced46

I have a 2011 M sport 335xi w/n55 6MT. Same exact thing as yours, unless you dont have Xdrive? Maybe Xdrive has the resonators and Rwd doesnt?

I just installed and AMS exhaust on mine. I sent you a PM as well with a few questions

it maybe the XI.
Do you know if your build was in South Africa or Germany?

got pm.
sent u back.

[shockin330i]

maybe it's the xdrive ones or 6mt...

[D.B.S]

I believe I read that the New N55 have half as many Cats... Frankie, your stock exhaust system post DP has no cats right? Leads me to believe their is only 1 Cat on the DP, god knows what the cell count is on them

[Juiced46]

Originally Posted by FrankiE90

it maybe the XI.
Do you know if your build was in South Africa or Germany?

got pm.
sent u back.

My car was built in Germany. It may very well be because of the Xdrive. Im going to shoot over to my shop now to grab a pic of the stock exhaust. I will post it up here in a few mins

Originally Posted by Army335xi

I believe I read that the New N55 have half as many Cats... Frankie, your stock exhaust system post DP has no cats right? Leads me to believe their is only 1 Cat on the DP, god knows what the cell count is on them

Mine has 2 resonators on the midpipe. The N55 has 2 cats, however its in 1 canister if that makes sense? The cat is on the downpipe, its one large canister that houses 2 cats in that single canister. I can get the cell count info as well, I need to wait until tomorrow though when I get to work.

[D.B.S]

Dual Cat in 1 Canister? So if a Catless DP is made, you truly are Cat-less...

I don't see why a Muffler Delete would make a difference though, seeing how shockin330i said he felt like he lost hp with a MD. All the back pressure is essentially still their...

Although after having looked at the inside of an E70 muffler, I can see how their is a ton of pressure: http://www.xoutpost.com/bmw-sav-foru...m-exhaust.html

Anyone opened up one of the E90 mufflers?

[shockin330i]

it may have been the heat. It's been really hot down here...

[Juiced46]

Originally Posted by Army335xi

Dual Cat in 1 Canister? So if a Catless DP is made, you truly are Cat-less...

I was able to access my N55 manual online. Here is a pic right out of the manual to get a better idea. Also I attached pics of my stock exhaust, you can see the 2 resonators as well.

This is what I mean about the 2 cats in 1 canister. Ceramic structure 1 has 600 cells and Ceramic structure 2 has 400 cells



Here is my stock stuff after the downpipe.

[D.B.S]

Originally Posted by FrankiE90

go for the dry one.




this is how the N55 OEM exhaust is.
drop'd my exhaust last night and installed the Vanguard Exhaust.
that's one way to save money, bmw. ty.

Frankie... You did a baseline dyno, and one with the New HP AW filter... Planning to do a dyno with the vanguard exhaust? Would be interested to see if their was any gains compared to the baseline, or if its the same, just a better sound. It's possible that a muffler delete might be too much of a reduction in backpressure on the N55, or maybe it really was the heat where Shockin is at..

But too bad you didn't do a dyno shockin when you had the MD, so that we could have had a good comparison

[D.B.S]

Originally Posted by Juiced46

Here is my stock stuff after the downpipe.


]

Ok... That's good... BUT I think those big canisters aren't resonators, I think those are actually cats themselves, probably 600 cell each (the '08 335xi I had prior to getting the E70) had two canisters (same size and dimension) and they were 600 cell Cats.

I bet if you cut those bastards open, they are cats and not resonators.

Your looking at a total of about 2200 cells between the main cat (1 and 2nd Structure) and the cats on the exhaust.

The N54 was running with 2400 cells total (pre and post cats). BMW is not going to reduce the cat cell count by an extreme amount

[Juiced46]

Originally Posted by Army335xi

Ok... That's good... BUT I think those big canisters aren't resonators, I think those are actually cats themselves, probably 600 cell each (the '08 335xi I had prior to getting the E70) had two canisters (same size and dimension) and they were 600 cell Cats.

I bet if you cut those bastards open, they are cats and not resonators.

Your looking at a total of about 2200 cells between the main cat (1 and 2nd Structure) and the cats on the exhaust.

The N54 was running with 2400 cells total (pre and post cats). BMW is not going to reduce the cat cell count by an extreme amount

They are definetely not cats. Here is another quote from the N55 manual. They are resonators. Remember the N55 engine is also alot more efficient and less emissions due to the Valvetronic that the N54 did not have.

If they were cats the post cat o2 sensor would be after the downpipe. As you can see its in the middle of the downpipe between the 2 cats.

"Exhaust System
With the single twin scroll turbocharger , the design of the exhaust system is less compli-cated than that of the N54 engine, with two turbochargers. In addition to a “near-engine” catalytic converter design, the exhaust system also features a center silencer and two rear silencers.

Note: Due to the high efficiency of the “near engine” three way catalytic
converter , no additional catalytic converters are necessary."

[FrankiE90]

Dave, yeah
the XI 2011 exhaust is different from the I.
thanks for the picts.


those look like cats.
??? res?

[D.B.S]

Ok... Sounds good enough for me... Still curious to see what gains Frankie's vanguard system gave over the stock one, or no gains at all...

[shockin330i]

those do look like cats...

[D.B.S]

Those Resonators looks like cats... But the proof is in the writing... YOu didn't have cats on your system right frankie (stock)?

[Juiced46]

Originally Posted by Army335xi

Ok... Sounds good enough for me... Still curious to see what gains Frankie's vanguard system gave over the stock one, or no gains at all...

I unfortunately cannot cut my pipe up, but hopefully someone does so we can confirm. They very well could be cats, but according to the manual they are not, atleast the way Im reading it. Im "assuming" they are resonators. Unless its the way they have it worded. As you can see in the NOTE it does say "Due to the high efficiency of the “near engine” three way catalytic converter
"

What do they mean by a 3 way cat? It looks like a 2 way cat to me. Unless the DP cat(s) are counted as one, and the 2 things I'm calling resonators are the other 2 cats?

I would be more then happy to forward the 100 page N55 pdf manual to anyone who wants to poke through it. Alot of good info in it.

[FrankiE90]

Originally Posted by Army335xi

Ok... Sounds good enough for me... Still curious to see what gains Frankie's vanguard system gave over the stock one, or no gains at all...

i'm curious too.
not going even say butt dyno impressions.
let's wait for those numbers.
watch I lose 20whp

Originally Posted by Army335xi

Those Resonators looks like cats... But the proof is in the writing... YOu didn't have cats on your system right frankie (stock)?

no cats - straight pipes to the downpipe. look at the pict i took.
for all i know the primary cats are hiding somewhere.

[Juiced46]

Originally Posted by FrankiE90

Dave, yeah
the XI 2011 exhaust is different from the I.
thanks for the picts.


those look like cats.
??? res?

I wonder why they added them on the XI? Unless like you said in the PM, maybe there is a difference in downpipes. When I go to work tomorrow I will try to find more info. Ill check to see if the part #s for the DPs are different to start, and try to find more solid info about the cats.

[D.B.S]

Originally Posted by Juiced46

I unfortunately cannot cut my pipe up, but hopefully someone does so we can confirm. They very well could be cats, but according to the manual they are not, atleast the way Im reading it. Im "assuming" they are resonators. Unless its the way they have it worded. As you can see in the NOTE it does say "Due to the high efficiency of the “near engine” three way catalytic converter
"

What do they mean by a 3 way cat? It looks like a 2 way cat to me. Unless the DP cat(s) are counted as one, and the 2 things I'm calling resonators are the other 2 cats?

I would be more then happy to forward the 100 page N55 pdf manual to anyone who wants to poke through it. Alot of good info in it.

send the manual my way, I would be interested in looking thru... johannlindsey@gmail.com

Three way, usually means three cats... The N54 was a Four way cat system (correct me if I'm wrong)

[D.B.S]

Originally Posted by FrankiE90

i'm curious too.
not going even say butt dyno impressions.
let's wait for those numbers.
watch I lose 20whp





no cats - straight pipes to the downpipe. look at the pict i took.
for all i know the primary cats are hiding somewhere.

YOur primary cats are on the DP... It's the 2nd cats that are in question... Are they hiding somewhere in your stock exhaust piping, or do they just not exist at all...

[Juiced46]

Originally Posted by Army335xi

send the manual my way, I would be interested in looking thru... johannlindsey@gmail.com

Three way, usually means three cats... The N54 was a Four way cat system (correct me if I'm wrong)

Manual is on its way. Exhaust system stuff starts on page 66

You very well may be right and Im wrong. Maybe Im reading into it the wrong way and they are cats. Yes the N54 uses a 4 way cat system, and the secondary cats on the N54 look like whats on my exhaust, like I said, you may be right.

But also, lets assume for a min the 2 canisters in the back are cats to complete the "3 way" cats. Why on Frankies car, does he not have any? So that would mean he has 1 cat? So where do they get 3 way from? The manual doesnt get that in depth and break up differences between XI and I. I will see if my service info at work has more detailed information then whats in my online manual.