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Author: Paul Dippell
What is the MajorHavoc Wind Blocker?
One Minute Installation
Questions to be Answered
- Skywatch Meteos SW-3 Elite hand-held wind meter:
- 2000 Honda S2000 (stock), 41,000 miles, top down, no boot cover
The equipment was set up in the S2000 to most closely approximate the presence of a human in the passenger seat. The wind speed meter was mounted via a "goosneck" arm to be approximately where a head would be, and similarly the sound meter was mounted and aimed at the headrest:
And the location for the testing:
And finally, the results!
% Change in Wind Noise
With the windows up, the Wind Blockers reduced wind noise at the passenger headrest by an average of .4% decibel (dB). Since the decibel scale is logarithmic (each 10dB is 2x as loud as the last), this reduction, though not large, is bigger than it appears. At 85mph, however, the Wind Blockers increased wind noise.
With the windows down, the Wind Blockers typically raised noise levels. Best guess: when the windows are down, more road noise is reflected into the cockpit by the Wind Blockers.
% Change in Wind Speed
With the windows up, the Wind Blockers reduced wind speed at the passenger headrest by an average of 45%, which is significant. At 85mph, the reduction was a huge 84%. At 40mph, though, the Wind Blockers increased wind speed slightly.
With the windows down, the Wind Blockers generally raised wind speed levels somewhat. Best guess: windows down, the vacuum behind the car normally pulls wind over the doors and through the headrests. Windows up, there is more swirling behind the headrests, which the Wind Blockers effectively stops from coming back into the cockpit through the headrests.
% Change in Wind Chill
Assuming an ambient temperature of 50°F, rolling up the windows reduces wind chill by 3.5°F.
With the windows rolled up, the Wind Blockers further reduce wind chill by 1.8°F.
With the windows down, the Wind Blockers increase wind chill very slightly (.2°F).
Compared to the windows down and no Wind Blockers, rolling up the windows and installing them reduces wind chill by 4.5°F.
If you prefer to drive top down, windows down the blockers are actually slightly counterproductive.
Being low cost and quick to install and remove, the Wind Blockers can be an effective part of your S2000's cool-weather "windows up" configuration.
Any additional quietness due to the Wind Blockers was not readily noticeable. But ambient noise is hugely and rapidly variable. The dB meter doesn't lie, but ears are apparently more easily fooled.
Given the effect of cold drafts on the back of the neck and ears, the percieved "warmness" effect of the Wind Blockers probably increases as the ambient temperature gets colder.
My usual passenger likes knowing her driver has taken all reasonable steps to ensure her comfort during cool weather drives at unreasonable speeds.
A passing luxury car increases cockpit noise by 3-4 dB, the same as a Harley at 100 yards.
A passing SUV with street tires increases noise by 4-6dB.
Full throttle acceleration at any speed registers 87dB, the same as steady-state driving at 85mph with the windows down.
At all speeds (including 85mph), running with the top and windows closed (up) increases cockpit noise by 3-4 dB. Wind and external noise is apparently more than replaced by trapped mechanical and road noise.
Cruising at 55mph in the slow lane on a mostly empty, new freeway, cars will line up behind you nose to tail, contentedly chewing their cud and following along.
As indications that Honda really did put a lot of work into the aerodynamics around the
headrests and roll bars:
As long as he gets paid, the toll booth attendant appears to not notice that the same guy in a black roadster with wacky cockpit gear has passed through 12 times in the span of 2.5 hours... or maybe it happens all the time.
Didn't cars and trucks pass you during the test runs?
Is this a scientifically valid teast?
Do you have any background or training that would qualify you to perform this test?
So these results are invalid, scientifically and statistically speaking?
So then, you won't be buying the Wind Blockers?
For a PowerPoint presentation of this review (much nicer!) please click here.
This page last updated 2/5/03.
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