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msaby
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« Reply #30 on: August 15, 2008, 10:49:11 PM » |
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Jelps
I hope I didn't discourage you, by all means experiment, if you can get some kind of exotic exhaust note I would consider it a success. Just don't beat yourself up trying to duplicate the sound of a real lambo or ferrari. I looked at several options myself to try and give a unique sound to my SBC but had to settle for what fit within my available space.
Mike
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TOMMYTREETRUNK
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« Reply #31 on: August 16, 2008, 07:22:29 AM » |
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This seem to be some type of after market racing/sports exhaust. But this also shows that coming close the sound of an f car can be achieved. Because there are so many difference after market products producing slightly different sounds coming from the same type of f car. You know, I have thought about this for months. I was thinking along the lines of "tuning" the exhaust pipe like you tune a horn (trumpet, etc.) At low rpms it wouldn't have enough force to make any distinguishing sound, but at high rpm if you could generate enough flow...you just might be able to hit that Italian note, or something close.  Vroombox was an attempt at humor.  Now this is the way it has to be done. Because every part of the exhaust system makes it's own changes to the original sound coming from the engine. Find the right combination and you will do what everyone says is impossible. If you feel that anything that you want can be accomplished, never let anyone tell you other wise... just keep working on it until you prove them all wrong. TTT |
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The Kit Cars Forum
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« Reply #31 on: August 16, 2008, 07:22:29 AM » |
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GTOpower
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« Reply #32 on: August 16, 2008, 07:54:39 AM » |
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You know, I have thought about this for months. I was thinking along the lines of "tuning" the exhaust pipe like you tune a horn (trumpet, etc.) At low rpms it wouldn't have enough force to make any distinguishing sound, but at high rpm if you could generate enough flow...you just might be able to hit that Italian note, or something close. Vroombox was an attempt at humor. If you put a trumpet on your exhaust and made it play a tune it will sound something like this: http://www.videosift.com/video/Renault-F1-engine-plays-My-Country-Tis-of-Thee |
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FunnyWheels
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« Reply #33 on: August 16, 2008, 10:11:14 AM » |
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I stand by my initial comments. It can't be done.
I have a car with a 3800 V6, No cats running an expansion muffler and silencers in the exhaust tips. I don't pull 9,000 rpm, my engine tops out at 6,300 rpm. It has a heavy flywheel so it doesn't rev fast, it is not a DOHC motor with a flat plane crank, it does not have un silenced individual intake ports and injectors, it doesn't have equal length headers. I am however in the process of adding a T04b turbo with all the goodies to get it up to 409 HP. It will whoosh and snarl at other cars but it is still not going to sound like a Ferrari. I would if I could but without a Ferrari drive train I am just out of luck. Don't get me wrong. The Ferrari OEM mufflers make your car sound like it is not an MR2 or Fiero, just not a Ferrari. The one I had on my car in the past weighed a ton, that's why I went for a custom solution...just like the Ferrari guys do to get rid of un-necessary weight.
Just my thought on the topic.
Dave
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MURCenary
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« Reply #34 on: August 16, 2008, 10:41:18 AM » |
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Dave, Can you post a video on this thread so we can at least hear what it sounds like. Thanks in advance. MURCenary  |
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FunnyWheels
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« Reply #35 on: August 16, 2008, 10:57:02 AM » |
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Dave, Can you post a video on this thread so we can at least hear what it sounds like. Thanks in advance. MURCenary I don't know how to do that. I will record it tomorrow then email it to you if that will work? |
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christoforo
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« Reply #36 on: August 16, 2008, 01:18:55 PM » |
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could someone post the sound of a v8 with ferrari exhaust
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nick200
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« Reply #37 on: August 17, 2008, 03:34:27 AM » |
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My thoughts are an exhaust sound is a complex combination of pulse's, load rpm etc .... So to get the sound from a 4cyl Mr2, 6 cyl Peugot/Fiero engine to match a V8 ferari engine is just not going to happen.
HOWEVER what i think is possible as memtioned by TT is to tune the exhaust. At some point in the rpm range you may come close to a sound which is emitted by an F engine at ONE point in its operating range.
Also exhaust butterfly valves as used on F exhausts can change the tone by different gas routes through the exhaust system. I've done this on my toyota and it reduces the low freq drone at low rpm but then allows near full flow at higher rpm.
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TOMMYTREETRUNK
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« Reply #38 on: August 17, 2008, 05:28:50 AM » |
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My thoughts are an exhaust sound is a complex combination of pulse's, load rpm etc .... So to get the sound from a 4cyl Mr2, 6 cyl Peugot/Fiero engine to match a V8 ferari engine is just not going to happen.
HOWEVER what i think is possible as memtioned by TT is to tune the exhaust. At some point in the rpm range you may come close to a sound which is emitted by an F engine at ONE point in its operating range.
Also exhaust butterfly valves as used on F exhausts can change the tone by different gas routes through the exhaust system. I've done this on my toyota and it reduces the low freq drone at low rpm but then allows near full flow at higher rpm.
nick200, Can you PM me on how you did this? I would like to do this with a BMW V12 to get the Murci sound. Thanks TTT I stand by my initial comments. It can't be done.
I have a car with a 3800 V6, No cats running an expansion muffler and silencers in the exhaust tips. I don't pull 9,000 rpm, my engine tops out at 6,300 rpm. It has a heavy flywheel so it doesn't rev fast, it is not a DOHC motor with a flat plane crank, it does not have un silenced individual intake ports and injectors, it doesn't have equal length headers. I am however in the process of adding a T04b turbo with all the goodies to get it up to 409 HP. It will whoosh and snarl at other cars but it is still not going to sound like a Ferrari. I would if I could but without a Ferrari drive train I am just out of luck. Don't get me wrong. The Ferrari OEM mufflers make your car sound like it is not an MR2 or Fiero, just not a Ferrari. The one I had on my car in the past weighed a ton, that's why I went for a custom solution...just like the Ferrari guys do to get rid of un-necessary weight.
Just my thought on the topic.
Dave
Funnywheels, Unless you don't want the F car sound, why would you use a V6 in your build? I really can't understand why so many builders will spend so much money on a kit to get it to look like a twin sister to the OEM, then pitch pennies at the heart of your master piece. If a V8 will give a closer OEM tone, why not start with a V8, instead of selling yourself short with anything less? The sound is a very important component of the overall build... please don't neglect it. TTT |
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Greenmeansgo
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« Reply #39 on: August 17, 2008, 06:34:52 AM » |
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i dont believe sound is too important. 20% of ferraris have aftermarket exhaust and dont sound the same
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TOMMYTREETRUNK
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« Reply #40 on: August 17, 2008, 08:26:50 AM » |
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i dont believe sound is too important. 20% of ferraris have aftermarket exhaust and dont sound the same
Which only proves the point. The 20% do sound different from OEM and maybe one another... but they all have a V8 sound and are not questioned as to whether or not they're real. TTT |
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swoodard23
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« Reply #41 on: August 17, 2008, 11:51:20 AM » |
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i dont believe sound is too important. 20% of ferraris have aftermarket exhaust and dont sound the same
Which only proves the point. The 20% do sound different from OEM and maybe one another... but they all have a V8 sound and are not questioned as to whether or not they're real. TTT Just to be clear, an italian v8 and an american v8 sound nothing alike and never practically will. Adding an italian v8 is not practical. So I guess I don't get your point. Funnywheels stated several times the aspects of drivetrain design that account for the differences. I do not think he has "pinched pennies" on anything involving his kit car and I'm sure his exhaust will sound great. |
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christoforo
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« Reply #42 on: August 17, 2008, 11:55:19 AM » |
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what would it sound like with an american v8 and sport 328 exhaust. will it still have a muscle car sound or a different sound.
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GTOpower
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« Reply #43 on: August 17, 2008, 12:14:23 PM » |
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what would it sound like with an american v8 and sport 328 exhaust. will it still have a muscle car sound or a different sound.
No it will still sound like a truck. |
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Faker
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« Reply #44 on: August 17, 2008, 12:15:04 PM » |
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My thoughts are an exhaust sound is a complex combination of pulse's, load rpm etc .... So to get the sound from a 4cyl Mr2, 6 cyl Peugot/Fiero engine to match a V8 ferari engine is just not going to happen.
HOWEVER what i think is possible as memtioned by TT is to tune the exhaust. At some point in the rpm range you may come close to a sound which is emitted by an F engine at ONE point in its operating range.
Also exhaust butterfly valves as used on F exhausts can change the tone by different gas routes through the exhaust system. I've done this on my toyota and it reduces the low freq drone at low rpm but then allows near full flow at higher rpm.
nick200, Can you PM me on how you did this? I would like to do this with a BMW V12 to get the Murci sound. Thanks TTT I stand by my initial comments. It can't be done.
I have a car with a 3800 V6, No cats running an expansion muffler and silencers in the exhaust tips. I don't pull 9,000 rpm, my engine tops out at 6,300 rpm. It has a heavy flywheel so it doesn't rev fast, it is not a DOHC motor with a flat plane crank, it does not have un silenced individual intake ports and injectors, it doesn't have equal length headers. I am however in the process of adding a T04b turbo with all the goodies to get it up to 409 HP. It will whoosh and snarl at other cars but it is still not going to sound like a Ferrari. I would if I could but without a Ferrari drive train I am just out of luck. Don't get me wrong. The Ferrari OEM mufflers make your car sound like it is not an MR2 or Fiero, just not a Ferrari. The one I had on my car in the past weighed a ton, that's why I went for a custom solution...just like the Ferrari guys do to get rid of un-necessary weight.
Just my thought on the topic.
Dave
Funnywheels, Unless you don't want the F car sound, why would you use a V6 in your build? I really can't understand why so many builders will spend so much money on a kit to get it to look like a twin sister to the OEM, then pitch pennies at the heart of your master piece. If a V8 will give a closer OEM tone, why not start with a V8, instead of selling yourself short with anything less? The sound is a very important component of the overall build... please don't neglect it. TTT The size of the engine means absolutely nothing. I would say that the least accurate kitcar sound comes from the BMW V12. The only identical sound to a Lamborghini is a tiny 4 cylinder sport motorcycle engine. A 4 cylinder Mr2 engine is a lot closer to the Lamborghini then a Bmw V12. The closest car engine I have heard that sounds like the genuine is the Nissan 6 cylinder that is used in the 350z/g35. With a proper exhaust that thing sounds pretty close. I did a ton of research about this because this is very important to me, and I still have not decided what I am going to do. |
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