Our V4 sound explained.

Discussion in 'General VFR Discussions' started by RVFR, Apr 20, 2017.

  1. RVFR

    RVFR Well-Known Member

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  2. GreginDenver

    GreginDenver Active Member

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    Watched that video, here's a question:

    Early in the video he shows (written on paper) his musically annotated representation of the VFR firing order. Am I mistaken, or did he get the order wrong? On his paper version it seems that he's got cylinders #2 and #4 firing order reversed.

    When he moves on to the "visual V8" model he describes the firing order correctly:
    1--3---2--4
     
  3. NorcalBoy

    NorcalBoy Well-Known Member

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    more bullshit.
     
  4. James Bond

    James Bond Member

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    You're right.
     
  5. Badbilly

    Badbilly Official VFRWorld Troll Of The Year!

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    The musical notation is the second chair French horn in this musical interlude:

    https://www.youtube.com/watch?v=SLuW-GBaJ8k

    Strauss would probably have been a BMW guy anyway.

    Once upon a time there was a company that made 180 degree crankshfts for Ford flatheads the fired two cylinders at a time. Sometimes the engines were paired with Ardun heads. The cranks were from Norden, the heads were designed by Zora Arkus-Duntov the big daddy of the Chevvy Corvette.
     
  6. Badbilly

    Badbilly Official VFRWorld Troll Of The Year!

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    Bullshit=E mc 2
     
  7. mofo

    mofo Active Member

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    That's music to my ears. No wonder I can't get enough of riding.
     
  8. duccmann

    duccmann Insider

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    Someone needs to grow up and take a chill pill or stop drinkin


    Sent from my iPhone using Tapatalk
     
  9. Allyance

    Allyance Insider

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    I thought is was a reasonable explanation and at least he took the time and effort to relate it to a musical example. When I first got my '83, I got a Vance and Hines 4 into two system. Sounded good, but not what I expected. To me VF750 never sounded like a 'hot' bike, but it sure pulled like one. Now I have both the 83 & the 14 with totally different engines and different sounds. I still don't think sound is as hot as a well tuned I-4 with a pipe. Exhaust pulses are evenly timed and create a more pure musical frequency. With the odd cadence and firing orders of the V-4s they have their own unique sound. Don't get me wrong, I love my V4s!, but certain engines just have a great sound, one that has stuck in my memory for years was a 427 Ford at the drag races, don't what was different about, but man it sounded great.

    More: I don't understand why NorCal has a bug up his ass about this. It's no so much the firing order, but the interval between firings. The V4 are asymmetrical whereas the I-4s have equal intervals. Not bullshit.
     
    Last edited: Apr 21, 2017
  10. Badbilly

    Badbilly Official VFRWorld Troll Of The Year!

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    If you dudes want to hear how any one of these V4s really sound, unbolt the muffler. If nothing else just to show the Harleydoods that loud pipes can make ya deef...They're already dumb..
     
  11. V4toTour

    V4toTour Active Member

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    [​IMG]
     
  12. GreginDenver

    GreginDenver Active Member

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    You were hearing something that you don't​ hear very often: a cross-plane crankshaft V8 that wasn't "choking" on its own exhaust.

    In normal applications a cross-plane V8 suffers from the fact that 2 cylinders in the same bank fire one-after-the-other only 90 degrees of rotation apart. This has the momentary effect of crowding the exhaust manifold with more gas flow than it was designed to efficiently handle.

    It's the big trade-off of the cross-plane V8. On one hand you get a really smooth engine​, but the resulting firing order makes it impossible to property size the exhaust tube diameter (to provide uniform scavenging).

    But your dragster didn't have a normal ​exhaust system.
     
  13. Gator

    Gator Insider

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    Cross Plane cranks on the R1 sure sound sweet too. Especially with a pipe. An Aprillia V4 is very sweet too. And I still love an I4 sound. And I love a twin 2 smoker and a triple smoker and my Dr 650 thumper........ Yeah I'm pretty much an addict.
     
  14. Allyance

    Allyance Insider

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    Thanks GreginDenver, the 427 was in a Mercury Cyclone in the very early 70's at Niagara Speedway. Just sounded so sweet. I had a high performance 289 in a little Italian body, same specs as a 289 Cobra for acceleration. Only car I ever had that could get front wheels off the ground so that I lost the steering! Made my own exhaust with two Austin Healy 6 mufflers, one in 2 out, sounded sweet with two sets of twin pipes. 67 was last year without any emissions crap on the engine. Was going to buy a 427 Cobra, but the stopped making them a month earlier!
     
  15. GatorGreg

    GatorGreg Honda Fanboy/LitiGator

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    That was very cool, thanks! You can clearly hear that awesome funky beat in my exhaust vid - I recommend cranking up the volume with a subwoofer :glee:

    [video=youtube;MRreFyBrv0w]http://www.youtube.com/watch?v=MRreFyBrv0w[/video]
     
  16. GreginDenver

    GreginDenver Active Member

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    My early experience with being amazed by the sound of a "normal" V8 (cross-plane) was at Road Atlanta in the mid '80s. Walking the pits with a knowledgeable SCCA driver and hearing an F5000 open-wheel V8 race car start up, the sound was incredible. The driver I was with explained the reason for the difference: this car had the "bundle of snakes" style exhaust system that stuck up above and beyond the engine to combine 8-into-4-into-2 from BOTH sides of the engine (which is the only way to truly solve the cross-plane V8 exhaust problem).
     
  17. VFR4Lee

    VFR4Lee Active Member

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    Forget the sheet music. The thing makes sounds that are music to my ears.
    So do the aprilias for that matter. :triumphant:
     
  18. Lint

    Lint Well-Known Member

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    I heard a 2016 R1 with an Austin Racing cat delete mid pipe and slip on on it two weeks ago. It sounded f*cking insanely good. Seriously gave my 99 with it's exhaust to a challenge. Serious V8 sound to it. Similar to this, but it sounded so much better in person. https://www.youtube.com/watch?v=ZbXnqgoN7Sg
     
  19. GatorGreg

    GatorGreg Honda Fanboy/LitiGator

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    Oooooh the Ford/Mercury 427 was an awesome engine! I used to be into Mercury Cougars (that's a pic of my '70 with a 351 Cleveland V8 below) and the 7 liter 427 was used in the 1968 Cougar GT-E model and was conservatively rated at 390 hp. For '70 you had a choice of the 351 Cleveland, Marauder 390, 428 Cobra Jet (with or without Ram Air), and the Boss 302! I had a custom exhaust system added to mine and it sounded incredible - wish I had a vid of it.

    [​IMG]
     

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  20. James Bond

    James Bond Member

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    It mostly doesn't matter to me since I wear 34db ear plugs. I don't have to say "huh" very often nor do I see how people ride without ear plugs.
     
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