On Sunday, March 2, 2003, at 03:07 PM, Bob Nogueira wrote:
> In my youth we had a formula for adjusting the headlights on a car ( I
> think
> it was actually part of the DMV drivers license test). It was
> something
> like the beam had to drop 2 inches at 25 feet and
> the left light had to be so many inches from the centerline.
> Anyone remember the formula?
When I installed Carrello Biode lamps in my '68 Volvo 142S, I put the
car in a darkened warehouse, and drove right up to the wall. I stuck
bits of tape on the wall, right in the center of the high beam
illumination of each headlight. Then I backed the car straight
backwards about 50 feet. I adjusted the high beams so they were still
centered about the pieces of tape. The low beams took care of
themselves.
As far as fine-tuning the low beams, take the car on a straight, dark
(and lonely -- you don't want interruptions) road. Take sheets of
cardboard or something to block the lamps, one at a time. Then walk
ahead of the car 100-150 feet and see where the pattern is hitting your
clothing. Adjust so it's where you want it. Then do the other lamp.
The Carrellos were a dual-reflector lamp, where the high beam reflector
was low and forward in the housing, and acted as the cutoff mask for
the low beam. Very nice lamps.
- Bill Rabel
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