MINI2

supersport · Feb 11th, 2003, 10:58 PM

OK, I just had and idea -- I really have to get to work.....

If it proves that a specifc part of the exhaust system is resonating too much -- first having had look under there to find it -- a fix might be to dampen it at the source by adding an amount of weight to the offending part -- exactly where the resonance occurs. Let's say thet a specific length of tubing vibrates like mad at criusing rpm -- well, clamp on a good sized lead fishing weight (or? - lead might melt..) at the place vibration is greatest, and I bet it will tone it down.
There is a chance that the resonance is so strong that too big a weight is needed.

Man I hope I won't waste anybody's time.....

Grinder · Feb 12th, 2003, 12:37 AM

Quote:

Originally posted by obehave
...Thoughts please...

I'm thinking that this has turned into a marvelous thread. I'd love to see all the different tests done to see what's *really* causing the resonance and what can be done to fix it, or to even just lower interior volume across the range. To all you guys who have posted, keep up the great work. I can't wait to see how everything goes.

macncheese · Feb 12th, 2003, 02:34 AM

Does anyone have concerns that the non traditional "power loop" is responsible for the resonance?

--
Cheese

Keith · Feb 12th, 2003, 03:03 AM

Quote:

Originally posted by macncheese
Does anyone have concerns that the non traditional "power loop" is responsible for the resonance?

The loop or a resonance in the main tube is probably good news - that would mean the source of the sound is outside the body of the car. Some good sound insulation would keep it there.

supersport · Feb 12th, 2003, 05:49 AM

I bet the wrap would work some -- anything to dampen the tubes -- It might work awsomely -- I just wonder about over heating of the tubes (I have no idea).

If it turns out that there is no single part of the exhaust that is the source -- and it is just a funtion of the tube length -- Then what???? The shorter the tube, the higher the frequency, and the drone happens at a higher rpm or cruise speed. But it ain't practical to change it......

I hope it's an isolated part that is resonating and can be damped, and not a tube length problem. If it is tube length, then I say: What were they thinking?

minimc · Feb 13th, 2003, 04:34 AM

begining to wonder if THIS wasn't the "method" within the madness of the heavy & restrictive OE cat-back system.

minimc · Feb 13th, 2003, 05:28 PM

Quote:

Originally posted by obehave
Not giving up my new exhaust though.

Hell NO!

Its FAR too good to be THAT upset about.
mc

binkydognose · Feb 14th, 2003, 12:52 AM

Skipped work to install the Magnaflow today.
I GOTS TRUMPETS!!!
Took a little longer than anticipated because I was by myself. I let the car sit on ramps all night to cool completely but still had a bit of a struggle breaking loose the bolts to the cat, until WD40. I then had trouble getting the muffler hangers into the middle isolater doohickeys. Made a panic call to Randy at MINI Motorsports, Randy helped just by re-assuring me, good guy... and more WD40 didn't hurt either.
Test drove for a bit during a rare Phoenix rain storm. The Magnaflow sounds just as I'd expected and hoped. Fantasticly deep and maximum gurgle-age.
The trumpet tips are outrageous but I really like them. Kinda like the MINI, loved or hated.
I had installed the Rogue/minimadness intake on Monday. Expensive but looks fantastic and INSTANTLY smoothed out first gear hesitation. I'm thinking this combo is going to work for me.

This may be the first time I wish it would stop raining!
Should be a fun drive into work tomorrow!

ram_one · Feb 14th, 2003, 02:30 AM

I loves my Trumpets!!!

CooPz · Feb 14th, 2003, 05:46 AM

Not meaning to be a big party pooper but All I am seeing are power losses on all the dynos from magnaflow systems. This has me more than a little worried. has anyone got as power GAIN shown on a dyno from this system? and "butt dynos" are often tricked by the excellent sound of the system.

binkydognose · Feb 14th, 2003, 01:24 PM

Hi CooPz, Try here for an overall compiled from various sources. Search Magnaflow though mini2, minicooperonline (MCO), and roadfly.
hth!

Albert · Feb 15th, 2003, 01:05 AM

I think there just might be some confusion between crank HP ratings and wheel HP ratings.

Check my magnaflow dyno thread in this forum for explanation.

minimc · Feb 15th, 2003, 01:34 AM

Quote:

Originally posted by CooPz
Not meaning to be a big party pooper but All I am seeing are power losses on all the dynos from magnaflow systems. This has me more than a little worried. has anyone got as power GAIN shown on a dyno from this system? and "butt dynos" are often tricked by the excellent sound of the system.

Dude!

You might believe I'm responding merely to defend my own Magnaflow purchase decision (by writing this) - which I am to a certain degree

BUT
I find it unusual that you've posted similar information to (at least) two sepparate Magnaflow threads without so much as an explanation as to where you've seen/heard that Magnaflow systems decrease horsepower. Due to this I am begining to question your intent/motivation.

If your goal is to warn us of some substantial information which is contradictory to what we've been lead to believe (up to now) then please post the data & sources.

If you cannot/will not, no one's gonna take you seriously – you’ll just appear as ill-informed or as though you’re trolling.

So... will you please share?

mc

Cape Cod MINI · Feb 15th, 2003, 02:07 AM

Quote:

Originally posted by CooPz
Not meaning to be a big party pooper but All I am seeing are power losses on all the dynos from magnaflow systems. This has me more than a little worried. has anyone got as power GAIN shown on a dyno from this system? and "butt dynos" are often tricked by the excellent sound of the system.

Post the links to your evidence.

Also, installed mine today. Damn, it's LOUD! Not sure I like it. Trumpets look dopey and poserish in my opinion. This will take a few days before I can decide to keep it or rip it out.
I've never had a rattle or vibration in my MCS until now. The front dash on the passenger side vibrates like crazy 'cuz of the Magnaflow

RandyBMC · Feb 15th, 2003, 02:55 AM

OK, I've read quite a few posts (though I have to be honest, not all of them in this thread) and I have to say a few things.

1. I think it's great the amount of effort that is going into trying to a) find the noise and b) quiet it.

2. The Magnaflow has a great sound to it - deeper, throatier, and more rumbly (I don't know if that's a word, but it is spot on in description

).

3. The Magnaflow is loud - it's not for everyone. This is one of it's only (and most significant) drawbacks.

4. Dynamat and sound deadening materials haven't done anything to change the noise issue.

5. Opening the window slightly or popping the sunroof seems to aleviate most of the problem.

6. The Magnaflow makes more power than any other system I've tested - The Borla, the Quicksilver, homegrown, B&B, MaxiTuner, or stock.

7. The Magnaflow is one of the cheapest units around as well - at least here in the US.

I think that sums up most of my thoughts. Here's what I think (I guess I did have just a few more):

If you want lightweight with good power gains, but no noise issue, go with the Quicksilver at $799.

If you want the stock tip look with 7 horsepower or so, a lot of pieces to put together, and the reputation of a huge company, go with the Borla at $670.

If you want the most power available with the most growl from a system go with the Magnaflow at $599.

Wait and see what else is coming - the UUC has quite a bit of promise. Here's a sneak peak of that system:

Some details:

63.5mm (2 1/2") after the resonator
Dual muffler system
Y-pipe into the muffler loop
63.5mm maintained after Y-pipe
35 lbs
Full stainless steel
No resonance issues
Extensively dyno tuned and developed
Very nice sound
Maintains the factory rear hangers
Pricing should be under $900

I hope that helps. Let me know if you have any other questions.

Randy
randy@mini-motorsport.com

RandyBMC · Feb 25th, 2003, 11:21 PM

Sorry for the long wait for a reply, obehave. I spend a lot of time at that "other" MINI site.

No dyno tests yet - probably late next week at the earliest.

$300 under $900? - probably not, but we'll see!

Randy
randy@mini-motorsport.com

RandyBMC · Feb 25th, 2003, 11:34 PM

Sorry for the long wait for a reply, obehave. I spend a lot of time at that "other" MINI site.

No dyno tests yet - probably late next week at the earliest.

$300 under $900? - probably not, but we'll see!

Randy
randy@mini-motorsport.com

Romhog · Feb 26th, 2003, 02:35 AM

Randy what is the ETA on this new exhaust?
Thanks

Here are some pics of it getting installed.

http://mini.loonybin.net/uucexhaust/

And here are the sound bites.

http://www.uucmotorwerks.com/mini/video/

suprchrgdmini · Feb 28th, 2003, 11:45 PM

Got my magnaflow that i traded my borla for today. went right over to my muffler guy and had it put on. I dont know why everyone is complaining it is real loud. I think it sound awesome and give good hp for the money. thanks again keith

ram_one · Mar 1st, 2003, 01:34 AM

Exactly! Now go change your sig.

Feb 11th, 2003, 10:58 PM	#81
supersport MINI2 Newbie Join Date: Jan 2003 Location: Victoria, BC Local Time: 01:15 PM Posts: 31 Offline	OK, I just had and idea -- I really have to get to work..... If it proves that a specifc part of the exhaust system is resonating too much -- first having had look under there to find it -- a fix might be to dampen it at the source by adding an amount of weight to the offending part -- exactly where the resonance occurs. Let's say thet a specific length of tubing vibrates like mad at criusing rpm -- well, clamp on a good sized lead fishing weight (or? - lead might melt..) at the place vibration is greatest, and I bet it will tone it down. There is a chance that the resonance is so strong that too big a weight is needed. Man I hope I won't waste anybody's time..... Here's to small cars

Feb 12th, 2003, 12:37 AM	#82 (permalink)
Grinder Addict Join Date: Sep 2002 Location: Northern VA. Local Time: 04:15 PM Posts: 1,118 Offline	Quote: Originally posted by obehave ...Thoughts please... I'm thinking that this has turned into a marvelous thread. I'd love to see all the different tests done to see what's really causing the resonance and what can be done to fix it, or to even just lower interior volume across the range. To all you guys who have posted, keep up the great work. I can't wait to see how everything goes. Whatever.

Feb 12th, 2003, 03:03 AM	#84 (permalink)
Keith MINI2 Senior Join Date: Aug 2001 Location: SW Florida Local Time: 09:15 PM Posts: 683 Offline	Quote: Originally posted by macncheese Does anyone have concerns that the non traditional "power loop" is responsible for the resonance? The loop or a resonance in the main tube is probably good news - that would mean the source of the sound is outside the body of the car. Some good sound insulation would keep it there. 2007 DS/W MCS LSD, sport suspension, Enkei RPM2 wheels 2002 EB/W MCS Sport package, Rogue intake, Borla exhaust, 15% pulley & Madness sway bar

Feb 12th, 2003, 05:49 AM	#85 (permalink)
supersport MINI2 Newbie Join Date: Jan 2003 Location: Victoria, BC Local Time: 01:15 PM Posts: 31 Offline	I bet the wrap would work some -- anything to dampen the tubes -- It might work awsomely -- I just wonder about over heating of the tubes (I have no idea). If it turns out that there is no single part of the exhaust that is the source -- and it is just a funtion of the tube length -- Then what???? The shorter the tube, the higher the frequency, and the drone happens at a higher rpm or cruise speed. But it ain't practical to change it...... I hope it's an isolated part that is resonating and can be damped, and not a tube length problem. If it is tube length, then I say: What were they thinking? Here's to small cars

Feb 13th, 2003, 04:34 AM	#86 (permalink)
minimc MINI2 Senior My Classifieds Join Date: Feb 2002 Local Time: 04:15 PM Posts: 457 Offline	tube length begining to wonder if THIS wasn't the "method" within the madness of the heavy & restrictive OE cat-back system.

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Feb 12th, 2003, 02:34 AM	#83 (permalink)
macncheese MINI2 Master Join Date: Apr 2002 Location: New Jersey Local Time: 05:15 PM Posts: 1,212 Offline	Does anyone have concerns that the non traditional "power loop" is responsible for the resonance? -- Cheese

Feb 13th, 2003, 05:28 PM	#87 (permalink)
minimc MINI2 Senior My Classifieds Join Date: Feb 2002 Local Time: 04:15 PM Posts: 457 Offline	Re: Re: tube length Quote: Originally posted by obehave Not giving up my new exhaust though. Hell NO! Its FAR too good to be THAT upset about. mc

Feb 14th, 2003, 12:52 AM	#88 (permalink)
binkydognose Dry Heat Join Date: Jul 2002 Location: Phoenix Arizona USA Local Time: 02:15 PM Posts: 198 Offline	Skipped work to install the Magnaflow today. I GOTS TRUMPETS!!! Took a little longer than anticipated because I was by myself. I let the car sit on ramps all night to cool completely but still had a bit of a struggle breaking loose the bolts to the cat, until WD40. I then had trouble getting the muffler hangers into the middle isolater doohickeys. Made a panic call to Randy at MINI Motorsports, Randy helped just by re-assuring me, good guy... and more WD40 didn't hurt either. Test drove for a bit during a rare Phoenix rain storm. The Magnaflow sounds just as I'd expected and hoped. Fantasticly deep and maximum gurgle-age. The trumpet tips are outrageous but I really like them. Kinda like the MINI, loved or hated. I had installed the Rogue/minimadness intake on Monday. Expensive but looks fantastic and INSTANTLY smoothed out first gear hesitation. I'm thinking this combo is going to work for me. This may be the first time I wish it would stop raining! Should be a fun drive into work tomorrow! Mike

Feb 14th, 2003, 02:30 AM	#89 (permalink)
ram_one MINI2 Regular Join Date: Dec 2002 Location: new jersey Local Time: 05:15 PM Posts: 132 Offline	I loves my Trumpets!!! '03 MCS - LY/W "Fried Egg"

Feb 14th, 2003, 05:46 AM	#90 (permalink)
CooPz 3M TA3 Join Date: Dec 2002 Location: Gold Coast Australi Local Time: 07:15 AM Posts: 221 Offline	Not meaning to be a big party pooper but All I am seeing are power losses on all the dynos from magnaflow systems. This has me more than a little worried. has anyone got as power GAIN shown on a dyno from this system? and "butt dynos" are often tricked by the excellent sound of the system. So I says to the cops, I says, "nah mate, that wasn't my tyres screeching, that was my passengers"

Feb 14th, 2003, 01:24 PM	#91 (permalink)
binkydognose Dry Heat Join Date: Jul 2002 Location: Phoenix Arizona USA Local Time: 02:15 PM Posts: 198 Offline	Hi CooPz, Try here for an overall compiled from various sources. Search Magnaflow though mini2, minicooperonline (MCO), and roadfly. hth! Mike

Feb 15th, 2003, 01:05 AM	#92 (permalink)
Albert MINI2 Regular Join Date: Jun 2002 Location: Costa Mesa, CA Local Time: 02:15 PM Posts: 295 Offline	I think there just might be some confusion between crank HP ratings and wheel HP ratings. Check my magnaflow dyno thread in this forum for explanation.

Feb 15th, 2003, 01:34 AM	#93 (permalink)
minimc MINI2 Senior My Classifieds Join Date: Feb 2002 Local Time: 04:15 PM Posts: 457 Offline	Are you sure of your source(s)? Quote: Originally posted by CooPz Not meaning to be a big party pooper but All I am seeing are power losses on all the dynos from magnaflow systems. This has me more than a little worried. has anyone got as power GAIN shown on a dyno from this system? and "butt dynos" are often tricked by the excellent sound of the system. Dude! You might believe I'm responding merely to defend my own Magnaflow purchase decision (by writing this) - which I am to a certain degree BUT I find it unusual that you've posted similar information to (at least) two sepparate Magnaflow threads without so much as an explanation as to where you've seen/heard that Magnaflow systems decrease horsepower. Due to this I am begining to question your intent/motivation. If your goal is to warn us of some substantial information which is contradictory to what we've been lead to believe (up to now) then please post the data & sources. If you cannot/will not, no one's gonna take you seriously – you’ll just appear as ill-informed or as though you’re trolling. So... will you please share? mc

Feb 15th, 2003, 02:07 AM	#94 (permalink)
Cape Cod MINI Exposing the Beast Join Date: Oct 2001 Location: Cape Cod, MA Local Time: 05:15 PM Posts: 5,337 Offline	Quote: Originally posted by CooPz Not meaning to be a big party pooper but All I am seeing are power losses on all the dynos from magnaflow systems. This has me more than a little worried. has anyone got as power GAIN shown on a dyno from this system? and "butt dynos" are often tricked by the excellent sound of the system. Post the links to your evidence. Also, installed mine today. Damn, it's LOUD! Not sure I like it. Trumpets look dopey and poserish in my opinion. This will take a few days before I can decide to keep it or rip it out. I've never had a rattle or vibration in my MCS until now. The front dash on the passenger side vibrates like crazy 'cuz of the Magnaflow Missing my buddies Dan and Ed but glad I have two angel buddies, And on a quest to Right Secco's Wrongs

Feb 15th, 2003, 02:55 AM	#95 (permalink)
RandyBMC MINI2 Regular Join Date: Jan 2003 Location: Denver, Colorado Local Time: 03:15 PM Posts: 98 Offline	OK, I've read quite a few posts (though I have to be honest, not all of them in this thread) and I have to say a few things. 1. I think it's great the amount of effort that is going into trying to a) find the noise and b) quiet it. 2. The Magnaflow has a great sound to it - deeper, throatier, and more rumbly (I don't know if that's a word, but it is spot on in description ). 3. The Magnaflow is loud - it's not for everyone. This is one of it's only (and most significant) drawbacks. 4. Dynamat and sound deadening materials haven't done anything to change the noise issue. 5. Opening the window slightly or popping the sunroof seems to aleviate most of the problem. 6. The Magnaflow makes more power than any other system I've tested - The Borla, the Quicksilver, homegrown, B&B, MaxiTuner, or stock. 7. The Magnaflow is one of the cheapest units around as well - at least here in the US. I think that sums up most of my thoughts. Here's what I think (I guess I did have just a few more): If you want lightweight with good power gains, but no noise issue, go with the Quicksilver at $799. If you want the stock tip look with 7 horsepower or so, a lot of pieces to put together, and the reputation of a huge company, go with the Borla at $670. If you want the most power available with the most growl from a system go with the Magnaflow at $599. Wait and see what else is coming - the UUC has quite a bit of promise. Here's a sneak peak of that system: Some details: 63.5mm (2 1/2") after the resonator Dual muffler system Y-pipe into the muffler loop 63.5mm maintained after Y-pipe 35 lbs Full stainless steel No resonance issues Extensively dyno tuned and developed Very nice sound Maintains the factory rear hangers Pricing should be under $900 I hope that helps. Let me know if you have any other questions. Randy randy@mini-motorsport.com

Feb 25th, 2003, 11:21 PM	#96 (permalink)
RandyBMC MINI2 Regular Join Date: Jan 2003 Location: Denver, Colorado Local Time: 03:15 PM Posts: 98 Offline	Sorry for the long wait for a reply, obehave. I spend a lot of time at that "other" MINI site. No dyno tests yet - probably late next week at the earliest. $300 under $900? - probably not, but we'll see! Randy randy@mini-motorsport.com 2002 MCS Chili Red/White - "The Mule" with 240+ warm horsepower at the flywheel [mods]

Feb 25th, 2003, 11:34 PM	#97 (permalink)
RandyBMC MINI2 Regular Join Date: Jan 2003 Location: Denver, Colorado Local Time: 03:15 PM Posts: 98 Offline	Sorry for the long wait for a reply, obehave. I spend a lot of time at that "other" MINI site. No dyno tests yet - probably late next week at the earliest. $300 under $900? - probably not, but we'll see! Randy randy@mini-motorsport.com 2002 MCS Chili Red/White - "The Mule" with 240+ warm horsepower at the flywheel [mods]

Feb 26th, 2003, 02:35 AM	#98 (permalink)
Romhog My mini is my casket Join Date: Sep 2002 Location: Dayton, Ohio Local Time: 04:15 PM Posts: 499 Offline	Randy what is the ETA on this new exhaust? Thanks Here are some pics of it getting installed. http://mini.loonybin.net/uucexhaust/ And here are the sound bites. http://www.uucmotorwerks.com/mini/video/ Last edited by Romhog : Feb 26th, 2003 at 02:49 AM.

Feb 28th, 2003, 11:45 PM	#99 (permalink)
suprchrgdmini BOLT ON MASTER Join Date: Apr 2002 Location: Long Island NY Local Time: 04:15 PM Posts: 516 Offline	Got my magnaflow that i traded my borla for today. went right over to my muffler guy and had it put on. I dont know why everyone is complaining it is real loud. I think it sound awesome and give good hp for the money. thanks again keith

Mar 1st, 2003, 01:34 AM	#100 (permalink)
ram_one MINI2 Regular Join Date: Dec 2002 Location: new jersey Local Time: 05:15 PM Posts: 132 Offline	Exactly! Now go change your sig. '03 MCS - LY/W "Fried Egg"

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