View Poll Results: Vote for best spoiler

Voters
28. You may not vote on this poll
  • NO SPOILER

    18 64.29%
  • SPOILER 1

    1 3.57%
  • SPOILER 2

    2 7.14%
  • SPOILER 3

    2 7.14%
  • SPOILER 4

    0 0%
  • SPOILER 5

    2 7.14%
  • SPOILER 6

    1 3.57%
  • SPOILER 7

    1 3.57%
  • SPOILER 8

    0 0%
  • SPOILER 9

    1 3.57%
Results 1 to 20 of 20

Thread: Trying to make a Custom Spoiler (plz vote for best spoiler)

  1. #1
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    Default Trying to make a Custom Spoiler (plz vote for best spoiler)

    Well I want to make a custom spoiler for my 240Z and so I drew a few sketched. Please provide you opinion as to which spoiler you like best or is the car better off without a spoiler or suggest a new design.

    The spoiler will be made of fiber glass. Iíll first make a consumable mold out of Styrofoam and then glass over it.

    NO SPOILER


    SPOILER 1


    SPOILER 2


    SPOILER 3


    SPOILER 4


    SPOILER 5


    SPOILER 6


    SPOILER 7


    SPOILER 8


    SPOILER 9

  2. #2
    NUTs according to wife ChrisZ's Avatar
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    No spoiler at all
    -73 240Z HLS30-171039
    -66 Roadster SPL311-05204

  3. #3
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    The last wing with the uprights leaned back like that will have additional leverage over a wing on vertical uprights and will produce more downforce. The spoiler #6 with the highest angle of attack would probably have the most downforce of the spoilers.

    If you search you might find the C&D article from the 70's that compared drag and downforce for various spoilers. Some of the less aggressive angles, like maybe #5, should actually decrease drag so you'd eliminate some of the lift at the rear and gain gas mileage.

    You might check the aero forum over at hybridz.org. I think they'll be more receptive in general to the idea of putting wings or spoilers on the Z than this board will be, and they've actually done a wind tunnel test of most of the common aero parts that you can buy for the Z too.

    I think your splitter and diffuser are not likely to function very effectively on a road car. You need them to be pretty close to the ground to really work, and then you need super stiff springs to keep the car level to keep them working consistently.
    Jon

  4. #4
    Former frequent poster sblake01's Avatar
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    With those as the choices I'd also have to say no spoiler at all. I'm actually trying to envision you renderings on an S30. It's hard to tell on that rendition because, at least to me, it's not really indicative of an S30. The body lines aren't right. Looks more like a modern retro Z.

  5. #5
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    Default

    If any - No 5 is my choice

  6. #6
    '72 240Z(G) 3.2L
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    What are you using to make a decision - looks or functionality?
    if a little knowledge can make you dangerous, I'm a little dangerous

  7. #7
    Registered User IdahoKidd's Avatar
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    Default

    Personally, I'm more concerned about the looks of the front. The front spoiler with the headlight looks like a shark about to bite into a surfboard. The lines are too awkward from the dam over the hood. And I definately would stay away from the cell phone tower inspired spoilers in the last two pics. So, #5 or none at all.

    Also bear in mind, I occasionally drive a Volvo too.........

  8. #8
    Semi-retired admin Arne's Avatar
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    IF I were interested in a rear spoiler for my car, I think that rather than try to reinvent the wheel, I'd be looking for something with a proven aerodynamic track record, like the rear BRE unit.
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

  9. #9
    Registered User TriDawgn's Avatar
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    Default

    Quote Originally Posted by Arne View Post
    IF I were interested in a rear spoiler for my car, I think that rather than try to reinvent the wheel, I'd be looking for something with a proven aerodynamic track record, like the rear BRE unit.
    BINGO... Probably the nicest looking one ive seen out there too.
    Resto in progress:
    1972 HLS30-73872

  10. #10
    1978 280Z (stock) TomoHawk's Avatar
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    You can also add a second air dam under the car in front of the rear axle.
    Last edited by TomoHawk; 10-24-2009 at 09:34 AM.
    Drive Responsibly.
    enjoy classic Rock music.

  11. #11
    Former frequent poster sblake01's Avatar
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    Quote Originally Posted by TomoHawk View Post
    You can also add a second air dam under the car in front of the wheels.
    Yes, you could but that would be a front air dam and this thread/poll/whatever is about a rear spoiler.

  12. #12
    Registered User psdenno's Avatar
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    I vote with the "None of the Above" group. The BRE style has looks and function and can be shipped to your door in a nice box - no need to fabricate unless you have a need for personal expression. In which case, our votes really don't matter.
    Dennis
    1971 240Z - Original Owner
    2010 Infiniti G37 Convertible

  13. #13
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    Well, I'm not gonna vote. I think you need to decide if you want a spoiler or not first, then decide what type. If you do truly want one, I would go with #5.

  14. #14
    1978 280Z (stock) TomoHawk's Avatar
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    I meant the air dam to go before the back wheels or axle, not the front. You won't even need a spoiler if you do it right.
    Last edited by TomoHawk; 10-24-2009 at 04:56 PM.
    Drive Responsibly.
    enjoy classic Rock music.

  15. #15
    '72 240Z(G) 3.2L
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    Function over Form:

    1) if you have a front air dam than "1" is the worst choice
    2) "4" is better than "5" (I have "5" BRE on my 240 but have the BSR version "4" in the works - molded off one of the BSR cars)
    3) "8" & "9" are the best for keeping the rear on the ground
    if a little knowledge can make you dangerous, I'm a little dangerous

  16. #16
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    Quote Originally Posted by Arne View Post
    IF I were interested in a rear spoiler for my car, I think that rather than try to reinvent the wheel, I'd be looking for something with a proven aerodynamic track record, like the rear BRE unit.
    Does "proven aerodynamic track record" mean that more people have run it on their Z, or that it's more effective? Pretty good info on what is effective here: http://forums.hybridz.org/showthread.php?t=121877 and the BRE spoiler doesn't produce the most downforce.
    Jon

  17. #17
    Semi-retired admin Arne's Avatar
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    Good point, Jon. I guess it all depends on the end goal. I don't need a lot of downforce for my street driving so I wouldn't necessarily looking for the "best", just a good combo of function and period correct looks. That's probably not the same parameters the original poster is looking for.
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

  18. #18
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    Is this truly a hand sketch? Did you do this on a computer? Those are HRE wheels too. Monobloks. I'm really impressed, regardless. If your Z has stock fenders and such, I say no spoiler. If you really have a car that looks like this, then this is a very important thing. You would then obviously have a ton of money to be able to make such a car, and I'd probably want to buy one off of you. If that's the case, I still say no spoiler unless it's a very slight ducktail. The rest of the car looks "Chris Banglish" (BMW designer up until a few months ago) and this car is on the level of Aston Martin good. No current smooth car has any wing but a little ducktail... of course, other than some Porsche 911s. No other car pulls off the big wing like the 911.

    Check out my 240Z project that's FINALLY done. here.

    www.jaredcullop.com/car-life

  19. #19
    NW Native JonnyRock's Avatar
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    Quote Originally Posted by blakt out View Post
    Is this truly a hand sketch? Did you do this on a computer? Those are HRE wheels too. Monobloks. I'm really impressed, regardless.[/IMG]
    The "sketch" of the car itself is from a rendering about what a new Z would look like, it's been floating around the forums for a few years now.

    Logan sketched the spoilers.
    ***PREVIOUSLY OWNED***
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    - Jon

  20. #20
    Registered User leftover z's Avatar
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    Default

    I agree with NO spoiler.

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