How much drag do the pop up headlights produce? | FerrariChat

How much drag do the pop up headlights produce?

Discussion in 'Boxers/TR/M' started by Threeofnine, Jul 12, 2024.

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  1. Threeofnine

    Threeofnine Formula Junior

    Dec 11, 2020
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    Birmingham, AL USA
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    Jarrod Heath
    #1 Threeofnine, Jul 12, 2024
    Last edited: Jul 12, 2024
    When the headlights are on I find my car (Testarossa) begins to struggle to gain MPH once you get past 160 mph. The headlights are pretty large so I imagine they produce a significant amount of drag. Has anyone tested to see how much of a hit to performance you get with the headlights on? I assume acceleration or handling must not be as impacted as top speed but I assume there is some hit.
     
  2. 66MK

    66MK Karting

    Nov 1, 2020
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    160mph in a 35+ year old car! You’re a brave man!! I haven’t taken mine anywhere near that!
     
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  3. Hg007

    Hg007 Rookie

    Nov 15, 2023
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    the other way to look at it is that they are Air Brakes ! very ahead of their time.

    cheers,
     
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  4. lagunacc

    lagunacc F1 Rookie
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    You can safely do 145mph in a 308 so 160 in a TR is even safer.

    120mph is cruising. On a race track of course.
     
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  5. turbo-joe

    turbo-joe F1 Veteran

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    you live in the US? so where you try to go so fast there???

    the 160 mph is about 260 km/h - there I put in my TR koenig competition the 5th gear :)
     
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  6. Threeofnine

    Threeofnine Formula Junior

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    I feel the car is very stable at those speeds.
     
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  7. Threeofnine

    Threeofnine Formula Junior

    Dec 11, 2020
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    Last night it was on a rural deserted stretch of the interstate highway at around 2AM. Luckily I didn’t end up in jail. I’m thinking I should move to your country.
     
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  8. lagunacc

    lagunacc F1 Rookie
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    Don't believe the hype. The current German autobuh ahn is a permanent construction zone with mostly 80kmph speed limits, suicidal eco drivers,
    and near 3rd world road surfacing.
     
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  9. turbo-joe

    turbo-joe F1 Veteran

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    also here in germany a lot of autobahn already limited :( :( :(
     
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  10. ferralc

    ferralc Formula 3
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    Sep 2, 2010
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    #10 ferralc, Jul 12, 2024
    Last edited: Jul 12, 2024
    Headlights up or down the car will struggle a bit accelerate faster than 160mph, the claimed top speed was 180mph and the car is now a 40 years old model.
    I’ve taken mine to 163mph using a GPS speedometer and the headlights were down, I think I would be able to reach it with more free road.



    Sent from my iPhone using FerrariChat
     
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  11. Threeofnine

    Threeofnine Formula Junior

    Dec 11, 2020
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    I’ve pushed mine to just north of 170, with the headlights down (GPS speed on my radar detector). I am curious if it would reach 180 but I’ve never had enough room/right conditions to try it. My car does have a cat delete and Tubi exhaust, although I’m not sure that would make much difference,
     
  12. ferralc

    ferralc Formula 3
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    Sep 2, 2010
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    My car was extremely stable at 160+, I do not have cats either and a sport exhaust but I don’t think it would make much difference, my only issue was slowing down, I pressed the brakes to slow down faster just to find out they would be useless if I had to brake in an emergency. Car still accelerates but it doesn’t really brake that well at such speeds.


    Sent from my iPhone using FerrariChat
     
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  13. lagunacc

    lagunacc F1 Rookie
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    It's a feature.


    BAD BRAKES
    One customer personally complained to Ettore Bugatti, claiming that the brakes in his race car were of poor quality. In a rather ironic letter,
    Bugatti replied that his cars were made for driving and not for braking. In fact, there was nothing wrong with the cars' brakes.
     
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  14. BR in the UK

    BR in the UK Rookie

    Sep 18, 2006
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    Stockholm
    Of course there is a hit but you drive that fast at night? Even with modern headlamps on a public road? Who cares about the drag , that’s insanity… you don’t have animals that nose around at night where you live? You want to risk hitting something at that speed? I don’t know the answer to your question but I think it’s pointless, how many people and why, would drive at night at those speeds?



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  15. 66MK

    66MK Karting

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    Something to with freedom of choice and individual autonomy I think.
     
  16. turbo-joe

    turbo-joe F1 Veteran

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    I only can drive faster than 300 km/h with my competition in the night on the german autobahn - but if there would be an animal what I will see before I hit it or not I not care at that speed. only keep the steering ;)
     
  17. Shark01

    Shark01 F1 Veteran

    Jun 25, 2005
    6,351
    The drag exerted by the lights on the car should be easy enough to calculate. I was performing similar calculations back 35+ years ago in the one or two AE classes I had to take (Mechanical Engineer by trade). There should be one or two AEs around here.
     
  18. Rifledriver

    Rifledriver Three Time F1 World Champ

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    Someone here who lives in Italy takes a route regularly in Northern Italy that is commonly used for top speed runs. It has a flat straight that is very long. He says by a GPS he has had his up to 186 a number of times. I do think the headlights would be a considerable hit.

    Have to agree, not something I'd do at night. Deer do a lot of damage at high speed. In a TR they would come right over the hood.
     
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  19. Rifledriver

    Rifledriver Three Time F1 World Champ

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    Car is well known for that. The design spent a lot of time in Ferraris new wind tunnel. The BB had a terrible reputation for high speed stability and Ferrari did not want to repeat that.
     
  20. BR in the UK

    BR in the UK Rookie

    Sep 18, 2006
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    Well sure, but so is drink driving, drugged driving, etc. and it’s all great until either you hit somebody else who isn’t expecting you or seeing you going so fast at night or you hit an animal and kill yourself. I rather thing about self preservation but to each their own…. The place to drive that fast is on a track, not out with all the crazies on the road…but that’s just my opinion.
     
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  21. BR in the UK

    BR in the UK Rookie

    Sep 18, 2006
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    We have a lot of wild boar active at night. Hit a 150 kg boar at night at those speeds and believe me, you will care…… or an elk…… but to each their own… interesting question on what the drag does of course….. ( theoretically)
     
  22. turbo-joe

    turbo-joe F1 Veteran

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    mostly on the german autobahn we have guard rails ( no boar jump over this ), and also have no elks here.
    but: no risk - no fun
    hopefully if I would hit a large animal at that speed I will be dead after the crash. but until now nothing not even like equal ever happened to me
    also you know: never drive faster than your Guardian Angel can fly :) :) :)
     
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  23. lagunacc

    lagunacc F1 Rookie
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    On the german auto-buh-ban you're more likely to hit a suicidal eco-driver than a wild animal.

    And the road surface is mostly 3rd world.
     
  24. 2dinos

    2dinos F1 Rookie

    Jan 13, 2007
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    Hitting an animal is a scary concept on the autobahn! I lost my Fiat X1/9, which I had owned for 16 + years, to a deer.

    It was a rainy night, and I was climbing a windy road on the way to the freeway when I saw Bambi on the hillside. I was driving maybe 45MPH. In an instant, I thought stay-stay-STAY! In that same instant, it ran down the hillside in front of me. I got on the brakes and dove down toward the passenger side, thinking it was coming through the windshield. The car scooped the large animal up and it slid right over the entire car making a mess and the horns puncturing panels on its travels. I got up and looked immediately through the rearview mirror and the animal was still tumbling on the road! I was able to see this because headlights from a small truck going down the road lit up its pathway. The deer quickly got up and continued across the road getting struck by the small truck. The animal further tumbled on the roadway, quickly got up, and finished its eventful trip across the road, running up the hillside on the other side and into the woods.

    If I were traveling 100, 150, or?? and came across this situation, I hope my guardian angel was riding a sweet Ducati!
     
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  25. turbo-joe

    turbo-joe F1 Veteran

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    if you would have been faster you not hit the deer because this one has been to slow to get hit from you ;)
     
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