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Manual Transmissions...

Discussion in 'Fine Living, Home, Design & Auto' started by Tck13, Apr 26, 2012.

  1. LawrenceMD

    LawrenceMD Well-Known Member

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    ^this is not really true in the real world. manual transmissions in the hands of a savvy driver will get higher milage compared to a DCT or automatic transmission. DCT will always have better performance speed wise, but aren't programmed to hypermiling.

    if you look at the hypermilers who go for world records they all use manual transmission diesel engined cars.

    http://wheels.blogs.nytimes.com/201...fuel-economy-record-in-volkswagen-passat-tdi/

    Hypermiling Taylors Set Fuel-Economy Record in Volkswagen Passat TDI

    "They departed May 3 and passed through nine states, averaging 84.1 miles per gallon during the excursion, and finished on May 5. By Wednesday the Taylors were on a plane, en route to their home in Australia."
     
    Last edited: May 10, 2012
  2. Trompe le Monde

    Trompe le Monde Well-Known Member

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    hypermiling isnt the really the real world
     
  3. LawrenceMD

    LawrenceMD Well-Known Member

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    come on man don't be like that. what I meant is that hypermiling techniques have been applied by savvy manual users for ages. hypermiling is the extreme example but manual drivers still do it to a degree.

    . when you go to car forums (such as the TDi forums) even with EPA estimates putting the dct versions with equal/higher mpg estimates. real world results are manual transmission users get higher mpg compared to the automatic versions.
     
  4. KurtS90

    KurtS90 Well-Known Member

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    I've always been known to cut the engine and coast to the red light and pop the clutch to get the car started... I am to cheap to buy a Hybrid. I don't have the balls to draft behind a big rig with the engine off...
     
  5. LawrenceMD

    LawrenceMD Well-Known Member

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    ^haha! well thats an extreme example, or actually not that extreme - for old school manual drivers who live in super mountainous regions. truckers have been doing that for ages.

    simple things like engine braking to stop light, downshifting before going up hill to gain momentum and even turning off the engine during heavy traffic/very long stop lights.. these are things that manual drivers learn to do instinctively due to the nature of the shifting.

    you can theoretically do that with a DCT, but thats just not programmed into the automatic shifting patterns. so in the end the DCT will be faster and aid in better performance speed wise, but that super efficient shifting will have a marginal impact on fuel economy.

    maybe the engineers have a button to press to engage super efficient (hypermiling type of shifting patterns) shifting programs, but I only see more sporty shift program options instead.
     
    Last edited: May 11, 2012
  6. A Y

    A Y Well-Known Member

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    Really? Do people besides hypermilers switch off their engines at lights? Anyway, it's all moot as many hypermiling techniques are now being integrated into cars. Start-stop engines are coming online now, but except for the hybrids, they kind of sound like the driver stalled the car.
     
  7. Huntsman

    Huntsman Well-Known Member

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    I am kind of anal about not randomly starting my car ( I don't leave it running at grocery stores and whatnot), but I try to not start it unnecessarily.

    Do the new stop/start cars have preoilers?
     
  8. KurtS90

    KurtS90 Well-Known Member

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    I only did the above in eco boxes... Such as Ford Escorts, Honda Civics, etc. Just a shit engine with little stress to get the peace crap moving. I would not do this with a sports car, like an M3... I also never done this with a carbed engine.
     
  9. Arthur PE

    Arthur PE Well-Known Member

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    fuel efficiency with a manual is solely up to driver skill
    with an auto software does the work
    parasitic losses in the new auto's are much less, even less than the manual in some applications
    a few advantages of the manual, typically more durable and they can be manipulated a bit more, say rocking out of snow, or slipping the clutch on bad surfaces for traction
    although the traction controls eat away at much of those advantages

    the best in my opinion, dual clutch automated 'manuals'
     
    Last edited: May 12, 2012
  10. A Y

    A Y Well-Known Member

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    More shifting pr0n compiled from F&F:

    [VIDEO][/VIDEO]

    I wish they'd included some heel-toe.
     
  11. Vaio

    Vaio Well-Known Member

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  12. rohde88

    rohde88 Well-Known Member

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    I love my S2k manual
     
  13. david3558

    david3558 Well-Known Member

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  14. LawrenceMD

    LawrenceMD Well-Known Member

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    shifting porn:

    [VIDEO][/VIDEO]



    honestly I don't do much heel toe these days... but once it a while i'll instinctively break it out when driving alone around the empty warehouse lined streets parts of brooklyn at night.
     
    Last edited: Jul 3, 2012
  15. GreenFrog

    GreenFrog Well-Known Member

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    senna must have gotten so much pussay.
     
  16. NORE

    NORE Well-Known Member

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    Care to expand on this? I taught myself to drive manual and all 12 of my cars have been manual (I count the Rangies as trucks) but never heard of this. Maybe I do it but I'm not sure what you mean here re rev matching.

    EDIT: I think that vid explained it. No rev matching (at least not the way he did it) for me, the M3 moneyshift still haunts me.
     
    Last edited: Jul 9, 2012
  17. HRoi

    HRoi Well-Known Member

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    i think with today's technology, the manual transmission is on its way out. i have a car with DCT and it literally has no weaknesses. if you want to be nitpicky, there's a light clunk when shifting between N and 1 and sometimes 2-1.

    how long it will take to die is the real question. i am a car geek and wherever i go i talk to people about their cars. there is not a single country that i've been to (Europe, Asia, South America) other than the US where manuals were not the majority of the cars i've rode around in. i bet you that most of the world's population don't even know what a DCT is. the tech is still pricey and more prevalent in the luxury/sport marques at the moment
     
  18. NORE

    NORE Well-Known Member

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    I refuse (and will continue to refuse) to buy a car that doesn't have three pedals and a shifter.
     
  19. GreenFrog

    GreenFrog Well-Known Member

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    Not sure which video you're referring to, but it's just the concept of revving your engine higher to match the transmission's RPMs. Since the lower gear will require higher RPMs, if you don't rev-match, you're putting un-due stress the moment the clutch engages since the engine abruptly has to match RPMs.. hence the money shift when you go from, say, 6th to 3rd. The pistons will just fly out of the engine.

    You'll know you've fucked up rev-match downshifting when the car clunks and jerks abruptly until the RPMs stabilize.

    Edit: Ahh, I see. The senna video. Yeah, he's heel-toeing which is an advanced manual technique. You're basically braking and downshifting at the same time by pressing the accelerator and brake pedal at the same time while using the clutch. Otherwise, you're forced to brake abruptly, quickly lift your foot to rev-match, and brake some more if necessary.
     
    Last edited: Jul 9, 2012
  20. NORE

    NORE Well-Known Member

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    Got it. I guess it also depends on whether you have a high revving engine or not. With the SAAB turbo I can downshift if needed and the revs match once I throw the lever. But I'm not trying that heel-toe brake-gas nonsense. My feet are way too big for that :)
     
    Last edited: Jul 10, 2012

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