11.5 Second WRX in Hawaii
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Car Info: Boosted Geo Prizm
Originally posted by palaban
The WRXs around don't sound good?
The WRXs around don't sound good?
Nah he just doesn't realize that a boxer engine doesn't sound like an inline 4 and will not be "oil can exhaust" sounding. n00b
First 12sec WRX in HI
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From: Going back to Cali, Monterey Bay Baby!
Car Info: 12.93@106.71
Most of us have the same boxer engine, the different exhausts vary a little but its the same boxer rumble. My advice to the Noob is too not hang on someone else's nutz for too long. Instead he should grow his own. The car will get mad props because well its bad, but saying all other WRX's sound bad well thats just stupid.
Hopefully we'll see him at a track event soon and I hope its not a show queen, I'd really like to check it out up close.
Hopefully we'll see him at a track event soon and I hope its not a show queen, I'd really like to check it out up close.
Last edited by Rexstang; Mar 18, 2003 at 04:21 PM.
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Boxer Motor Exhaust tones
The reason that the boxer style motor that is in the WRX/STI does not sound similar to most Inline-4 motors is actually due to a few things.
1. The stock exhaust manifold/header does not have equal-length runners.
2. Due to the length of the exhaust runners, there is potential for heat loss and allowing the gases to take up less volume.
3. The shape/route that the two pair of runners must take are usually dissimilar and will have a combined affect of points 1 and 2.
Finally what this all means is that the unequal: length, exhaust gas volume (heat), and velocity cause the exhaust pulses to enter the collector (or turbine housing) at an uneven rate. This will cause pulses to potentially run into each other, or arrive far away or close to each other in relation to pulse timing.
Although this does yield a unique sound, there is potentially a loss of horsepower/torque or an uneven power curve and turbo spool behavior.
-Steve Signorelli
1. The stock exhaust manifold/header does not have equal-length runners.
2. Due to the length of the exhaust runners, there is potential for heat loss and allowing the gases to take up less volume.
3. The shape/route that the two pair of runners must take are usually dissimilar and will have a combined affect of points 1 and 2.
Finally what this all means is that the unequal: length, exhaust gas volume (heat), and velocity cause the exhaust pulses to enter the collector (or turbine housing) at an uneven rate. This will cause pulses to potentially run into each other, or arrive far away or close to each other in relation to pulse timing.
Although this does yield a unique sound, there is potentially a loss of horsepower/torque or an uneven power curve and turbo spool behavior.
-Steve Signorelli
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From: Plymouth, MN
Car Info: 94 T-Leg Sedan and a 00 M5
Re: Boxer Motor Exhaust tones
Originally posted by ssignorelli
The reason that the boxer style motor that is in the WRX/STI does not sound similar to most Inline-4 motors is actually due to a few things.
1. The stock exhaust manifold/header does not have equal-length runners.
2. Due to the length of the exhaust runners, there is potential for heat loss and allowing the gases to take up less volume.
3. The shape/route that the two pair of runners must take are usually dissimilar and will have a combined affect of points 1 and 2.
Finally what this all means is that the unequal: length, exhaust gas volume (heat), and velocity cause the exhaust pulses to enter the collector (or turbine housing) at an uneven rate. This will cause pulses to potentially run into each other, or arrive far away or close to each other in relation to pulse timing.
Although this does yield a unique sound, there is potentially a loss of horsepower/torque or an uneven power curve and turbo spool behavior.
-Steve Signorelli
The reason that the boxer style motor that is in the WRX/STI does not sound similar to most Inline-4 motors is actually due to a few things.
1. The stock exhaust manifold/header does not have equal-length runners.
2. Due to the length of the exhaust runners, there is potential for heat loss and allowing the gases to take up less volume.
3. The shape/route that the two pair of runners must take are usually dissimilar and will have a combined affect of points 1 and 2.
Finally what this all means is that the unequal: length, exhaust gas volume (heat), and velocity cause the exhaust pulses to enter the collector (or turbine housing) at an uneven rate. This will cause pulses to potentially run into each other, or arrive far away or close to each other in relation to pulse timing.
Although this does yield a unique sound, there is potentially a loss of horsepower/torque or an uneven power curve and turbo spool behavior.
-Steve Signorelli
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Car Info: 02 Impreza WRX sedan
Originally posted by ssignorelli
The reason that the boxer style motor that is in the WRX/STI does not sound similar to most Inline-4 motors is actually due to a few things.
<snip...>
It may have something to do with the boxer layout and firing sequence. Porsche six-cylinder boxer engines have a very unique sound, as did the VW air-cooled motor of the old Beetle. Neither of those two engine families sound anything like conventional 'V' engines.
EDIT: Shockwave animation of a boxer engine (I had to install the latest version of Shockwave to view this).
--
0==WW==0
"…axles of evil…" - george w. bush
The reason that the boxer style motor that is in the WRX/STI does not sound similar to most Inline-4 motors is actually due to a few things.
<snip...>
It may have something to do with the boxer layout and firing sequence. Porsche six-cylinder boxer engines have a very unique sound, as did the VW air-cooled motor of the old Beetle. Neither of those two engine families sound anything like conventional 'V' engines.
EDIT: Shockwave animation of a boxer engine (I had to install the latest version of Shockwave to view this).
--
0==WW==0
"…axles of evil…" - george w. bush
Last edited by Wingless Wonder; Mar 18, 2003 at 10:49 PM.
Jeeezus!!
I know what a boxer engine sounds like, I know that it does not sound like any other inline or vee. What I was trying to say was that not all WRXs have the same exhaust, some sound worse than others. Out of the ones I've seen and heard, some I like, some I don't. I don't know about the lot of you, but sound is a factor when I decide on an exhaust system. Power is all good, but like life, everything is a compromise. I have a long commute to work, and my family rides with me; ya think my wife and kids can stand an "oil can" exhaust for over an hour? I followed a WRX down the Likelike last week, I rolled down the window just to listen to the car; with that exhaust my wife did not like it-she said it sounded like a lawn mower at idle. It got really loud as it accelerated away, I didn't like it too, but hey-to each his own. I've heard a black one at Eurosport, that one I liked. And the AVO car at Eurosport I like too, it had a deep tone yet very controlled-not farty. To all of you who are fortunate to own a WRX right now--did we all buy the same color? Did we all buy the same brand exhaust? Are we all going to put on the same kind of rims and run the same kind of tires? Give me a frickin' break! So all of you who decided to take it personal and lash out at this "nooB"--lighten up!! I love Scoobies, and not everyone will be the same, c'mon ya gotta leave some room for originality. Some will like it loud and nasty, others like me will like it more controlled. Scoobies rule!!, nuff-said.
I know what a boxer engine sounds like, I know that it does not sound like any other inline or vee. What I was trying to say was that not all WRXs have the same exhaust, some sound worse than others. Out of the ones I've seen and heard, some I like, some I don't. I don't know about the lot of you, but sound is a factor when I decide on an exhaust system. Power is all good, but like life, everything is a compromise. I have a long commute to work, and my family rides with me; ya think my wife and kids can stand an "oil can" exhaust for over an hour? I followed a WRX down the Likelike last week, I rolled down the window just to listen to the car; with that exhaust my wife did not like it-she said it sounded like a lawn mower at idle. It got really loud as it accelerated away, I didn't like it too, but hey-to each his own. I've heard a black one at Eurosport, that one I liked. And the AVO car at Eurosport I like too, it had a deep tone yet very controlled-not farty. To all of you who are fortunate to own a WRX right now--did we all buy the same color? Did we all buy the same brand exhaust? Are we all going to put on the same kind of rims and run the same kind of tires? Give me a frickin' break! So all of you who decided to take it personal and lash out at this "nooB"--lighten up!! I love Scoobies, and not everyone will be the same, c'mon ya gotta leave some room for originality. Some will like it loud and nasty, others like me will like it more controlled. Scoobies rule!!, nuff-said.
Last edited by shiroikage; Mar 19, 2003 at 12:41 AM.
First 12sec WRX in HI
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From: Going back to Cali, Monterey Bay Baby!
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I heard thru the grapevine that the white AVO WRX is Bob's from Eurosport. Any truth to this? If so why did he have to go buy an already built one, doesn't he own a shop himself? What does that say about his shop?
And Sean, I have the same nasty sounding Tanabe exhaust as the black one at Eurosport.
And Sean, I have the same nasty sounding Tanabe exhaust as the black one at Eurosport.
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Wingless Wonder
It's the Exhaust and number of cylinders that controls the sound of the motor, not whether or not it is an Inline, V or Boxer layout.
The fact is that an Inline-4 has 4 cylinders, 1 firing at equal intervals from each other (180 degrees of crank rotation), meaning that for all 4 cylinders to fire the crank with rotate 720 degrees.
The Boxer motor behaves in the exact same manner, 4 cylinders firing at every 180 degrees of crank rotation for a total of 720 degrees.
What this translates out to is that if you have: two motors, both with 4 cylinders, equal displacement, valve train, and both motors have true equal length headers they will sound nearly identical regardless of their engine layout such as boxer, V or Inline.
The fact is that most stock boxer motors have headers that utilize more unequal length headers then a comparable Inline motor. This is usually due to cost and difficulty of engineering a header that accomplishes equal length while fitting in a car.
If you want to hear an example of what I am talking about listen to a stock VW bug (older ones with boxer motor), then go to the desert, racetrack etc and listen to a VW with equal length headers. I promise you the two sound nothing-alike despite the fact that they are the exact same boxer engine layout.
-Steve Signorelli
It's the Exhaust and number of cylinders that controls the sound of the motor, not whether or not it is an Inline, V or Boxer layout.
The fact is that an Inline-4 has 4 cylinders, 1 firing at equal intervals from each other (180 degrees of crank rotation), meaning that for all 4 cylinders to fire the crank with rotate 720 degrees.
The Boxer motor behaves in the exact same manner, 4 cylinders firing at every 180 degrees of crank rotation for a total of 720 degrees.
What this translates out to is that if you have: two motors, both with 4 cylinders, equal displacement, valve train, and both motors have true equal length headers they will sound nearly identical regardless of their engine layout such as boxer, V or Inline.
The fact is that most stock boxer motors have headers that utilize more unequal length headers then a comparable Inline motor. This is usually due to cost and difficulty of engineering a header that accomplishes equal length while fitting in a car.
If you want to hear an example of what I am talking about listen to a stock VW bug (older ones with boxer motor), then go to the desert, racetrack etc and listen to a VW with equal length headers. I promise you the two sound nothing-alike despite the fact that they are the exact same boxer engine layout.
-Steve Signorelli
The Euro Sport WRX
Guys, I drove the Eurosport WRX that Bob brought in. DAMN!!!!! That car is the SHxxT.. I drove it last week. IT's!!!!!SOOOO Much fun. Unfortunately, yes, it does have tons of clutch chatter, like mine. Plus w/ the TODA flywheel, blipping is a must on down shifting. The suspension is SOLID, no doubt, but low end power delivery lags a bit too much for me to drive it for SCCA. Nevertheless, the car is SOLID! By the way, did you know he plans on selling it???? Guarenteed to be the fasted WRX on the island, w/ the right driver.
Larry
SCCA WRX15
Larry
SCCA WRX15
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Re: The Euro Sport WRX
Originally posted by WRX151
By the way, did you know he plans on selling it???? Guarenteed to be the fasted WRX on the island
By the way, did you know he plans on selling it???? Guarenteed to be the fasted WRX on the island