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I'd checked mine from 100 yds. in front... (archive)

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Posted by Bart B. on March 06, 2001 at 17:40:35:

In Reply to: How do oncoming cars feel about it? posted by Dave M. on March 06, 2001 at 15:55:07:

...and didn't notice any bad glare or brightness at all. But then, I'm biased because I did the conversion myself. And I'd earlier reaimed my headlights to correct beam centering.

I used the procedure shown in the web site below.
I prepared a level spot in the driveway across the top of several plywood shims, then parked the Z3 on them. A string level was set up from the headlight center to a place I marked on the garage door for centering the highbeam beam center on.

One important thing to remember. In the USA, highbeam aiming should place the center of the beam at the true horizontal when the car is perfectly level. My Z3 had its stock setting for both sides way too high; I had to adjust them back down to level or straight out from a level car.

The lowbeam center should strike about 1 to 2 inches below highbeam center at 12 feet. Just don't have your highbeam center above the horizontal. Typically, headlights with their highbeam centered above the horizontal cause oncomming traffic to highbeam you even though only your low beams are on. They're just aimed too high. Left-right aiming adjustments were also done.

The result after getting my Z3 headlights properly aimed was remarkable; much, much better road illumination.

Depending on the headlight reflector design, their relative alignment to each other and the particular bulb filament exact position, the beam centers can be off somewhat.

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