stupid question
04-22-2014, 11:23 AM
#1
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Thread Starter
stupid question
I have a 2000 coupe with pop-up lights. I was driving down the Autobahn the other night and I noticed that I cannot get the speed over 120mph with the lights on. but during the day I can get her up to 150-160MPH.
Is there a safety switch installed where the car wont go over 120mph with the lights on?
Is there a safety switch installed where the car wont go over 120mph with the lights on?
04-22-2014, 12:05 PM
#2
Team Owner
No.
04-22-2014, 01:23 PM
#5
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Must be your headlight covers acting like a sail!
04-22-2014, 02:37 PM
#6
Le Mans Master
04-22-2014, 02:40 PM
#7
Melting Slicks
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No question is a stupid question. That being said, not too many on this side of the pond would be able to answer your question because of our ridiculously low speed limits.
We can only dream of having the same problem. However, from personal experience in an older car, I know that having windows down at high speed makes a big difference in top speed so maybe the pop-ups have a similar impact.
We can only dream of having the same problem. However, from personal experience in an older car, I know that having windows down at high speed makes a big difference in top speed so maybe the pop-ups have a similar impact.
Last edited by 4 KRUSIN; 04-22-2014 at 02:43 PM.
04-22-2014, 03:20 PM
#9
Melting Slicks
Headlights up doesn't increase the frontal area, it just adds some turbulence above the front wheel wells, in an area where the airflow just isn't all that smooth to begin with. The fixed "frog-eye" headlights on the C5R aren't much better.
04-22-2014, 04:41 PM
#10
Race Director
Yeah, but 30-40MPH difference? I'm not buying it.
Headlights up doesn't increase the frontal area, it just adds some turbulence above the front wheel wells, in an area where the airflow just isn't all that smooth to begin with. The fixed "frog-eye" headlights on the C5R aren't much better.
Headlights up doesn't increase the frontal area, it just adds some turbulence above the front wheel wells, in an area where the airflow just isn't all that smooth to begin with. The fixed "frog-eye" headlights on the C5R aren't much better.
Of course, it kinda makes sense that even with high beams on, doing more then 120 MPH would surely outrun the lighting distance, safetywise-speaking. Perhaps all C5s in Germany require programming to limit higher speeds at night?
Last edited by Dave68; 04-22-2014 at 04:43 PM.
04-22-2014, 04:57 PM
#11
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I agree. With a 180 MPH top speed in 5th gear, it's highly unlikely that the headlights would reduce top end by 60 MPH.
Of course, it kinda makes sense that even with high beams on, doing more then 120 MPH would surely outrun the lighting distance, safetywise-speaking. Perhaps all C5s in Germany require programming to limit higher speeds at night?
Of course, it kinda makes sense that even with high beams on, doing more then 120 MPH would surely outrun the lighting distance, safetywise-speaking. Perhaps all C5s in Germany require programming to limit higher speeds at night?
04-22-2014, 05:47 PM
#12
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Doubt it's the headlights...
We did 150+ for several miles, and cruised at ~130 for awhile, on remote roads in NV during a cross country trip, with the roads signed for headlights on, night or day.
Ours were on/up, and our '02 Vert didn't flinch.
GL, mD
We did 150+ for several miles, and cruised at ~130 for awhile, on remote roads in NV during a cross country trip, with the roads signed for headlights on, night or day.
Ours were on/up, and our '02 Vert didn't flinch.
GL, mD
04-22-2014, 06:22 PM
#13
Race Director
What happens when you turn the pop up lights in the day? It's not your headlights trust me on that get that silly idea out of your head. As far as why you are having issues that's a odd one.
04-22-2014, 06:32 PM
#14
Team Owner
Maybe your right foot doesn't flex as far with your butt muscles puckered up driving that fast in the dark.
04-22-2014, 08:32 PM
#19
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I have a 2000 coupe with pop-up lights. I was driving down the Autobahn the other night and I noticed that I cannot get the speed over 120mph with the lights on. but during the day I can get her up to 150-160MPH.
Is there a safety switch installed where the car wont go over 120mph with the lights on?
Is there a safety switch installed where the car wont go over 120mph with the lights on?
