545i/550i Exhaust System
04-28-2010, 12:22 PM
#11
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My Ride: 2010 M5 alpine white, black full leather, etc.
[quote name='jpar002' date='28 April 2010 - 03:12 PM' timestamp='1272481972' post='1162015']
My sentiments exactly. I need an inexpensive setup with no adverse effects that sounds slightly more aggressive than an infinity FX or G35. I need to come up with a solution soon because my M5 rear bumper is being painted as we speak.
[/quote
Then, I assume you are looking for an inexpensive quad solution? Good luck.
My sentiments exactly. I need an inexpensive setup with no adverse effects that sounds slightly more aggressive than an infinity FX or G35. I need to come up with a solution soon because my M5 rear bumper is being painted as we speak.
[/quote
Then, I assume you are looking for an inexpensive quad solution? Good luck.
04-29-2010, 10:17 AM
#12
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My Ride: 04' 545i
[QUOTE=1600;1162049]
Nothing this car is inexpensive as you know.. reasonable?
Originally Posted by jpar002' date='28 April 2010 - 03:12 PM' timestamp='1272481972' post='1162015
My sentiments exactly. I need an inexpensive setup with no adverse effects that sounds slightly more aggressive than an infinity FX or G35. I need to come up with a solution soon because my M5 rear bumper is being painted as we speak.
[/quote
Then, I assume you are looking for an inexpensive quad solution? Good luck.
[/quote
Then, I assume you are looking for an inexpensive quad solution? Good luck.
04-29-2010, 11:51 AM
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I suppose my point of posting is to determine the best configuration that will not compromise low end torque, but still using components from muffler manufacturers like Magnaflow, Borla etc. I like that RPI produces an exhaust that has proven gains throughout, but from what I've heard on this forum, the exhaust note is a little raspy for my taste.
I love the throatier sounding exhausts, but I don't like the fact that you lose HP in some way with most of them.
I love the throatier sounding exhausts, but I don't like the fact that you lose HP in some way with most of them.
That's the main reason I went with Magnaflow was because of the deeper tone. I am, however, sad that I lost some low end torque.
04-29-2010, 12:06 PM
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I really wonder about all the ideas without supporting data. I replaced my rear two cans with a transverse Magnaflow with dual exits, each routed to twin tips for a quad look. Similar to the Remus setup but with the Magnaflow and 2.5 inch pipses it will easily flow 6 liters. I can't tell any difference at all except for a wonderful sound. If I did lose 10 ft.lbs of torque (highly doubt it) it's still a fair trade for the sound and the look. The 550i with stock exhaust is just way too quiet and it mutes the fun of the manual tranny. Now I have great off throttle sound, zero drone and a sweet low end sound without ever being too loud.
I think the fact is most all of your back pressure and scavenging is going to be a result of your cats, and the further back you mod (in my case aft of the center muffler) I just can't believe it's all that menaingful to power.
Still as an engineer I'd need to see a lot of data to prove gains/losses.
I think the fact is most all of your back pressure and scavenging is going to be a result of your cats, and the further back you mod (in my case aft of the center muffler) I just can't believe it's all that menaingful to power.
Still as an engineer I'd need to see a lot of data to prove gains/losses.
I thought about this a lot when I saw that the magnaflow inlet was 2.5" vs the 3" coming out of the car and was very worried about a large loss of power. Fortunately I haven't noticed any change since the upgrade and I have a straight 6. I did lose about .3 MPG, but I think that is because I hold the shift until later just to hear the purrrrrr!
04-30-2010, 01:26 AM
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Answer OP original question, yes, resonator can be substituted for a muffler. (I did this on my E36M3, RIP). Keep in mind the need for appropriate backpressure, as well as how LOUD it is going to be with only a resonator (or two).
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