[s-cars] hid 'upgrades'

[Chris Covington]

But still guys, even if it appears your getting "good" output and
everything lines up correctly, as per that site: (the guy I know from UM):

"The quantity and nature of the light put out by the arc is quite
different from that of the filament, and the reflector and optics of a
halogen headlamp are not designed to produce a proper headlamp beam with
anything but a halogen bulb. Even assuming the arc position were perfectly
matched-up with the filament position, the nature of the light from an HID
capsule is such that the resultant beam pattern will usually produce very
much excessive glare to oncoming drivers and backdazzle to the driver in
bad weather, and will fail to illuminate properly the places in the
driver's field of vision that really need to be illuminated."

and...

"In a nutshell, it is sometimes possible to physically adapt an
arc capsule to go where a filament lamp was meant to go. It is really NOT
possible to attain an acceptable (let alone compliant) beam pattern this
way. Some of the "retrofits" get kind of close with regard to cutoff
gradient and relative light levels within the beam, but most all of them
have beam problems...improperly placed hot spot, dark spots in the center
of the beam, excessive foreground illumination, excessive stray (glare)
light, improper cutoff placement, etc."

I'm not 'the' person to ask with these sort of issues, but I'm merely
bringing up a point off of a FAQ of a known lighting expert who strongly
encourages NOT adapting these systems.  And he's not making any money off
of this, as opposed to the "viper" GP people, etc.  I suggest either
sticking with standard halogens, or Euros, or else getting the Full C4
factory headlight system, and not one adapted from a totally different
Audi headlamp.  The "grow your own" type system, while
appearing OK on the surface, is just not up to spec.

Cov
'91 200q20v


On Tue, 9 Jul 2002, Charlie Smith wrote:

> Earlier, Chris Covington wrote:
> >
>
> Chris wrote a lot about ill fitting conversion 'setups', and I agree
> that there is a lot of bad stuff out there.
>
> However, the conversion kit GP that took place about a year ago
> was through Roe Racing at 914-733-546.  This was a Viper club that
> put this together.
>
> This provides a very good 9006 conversion kit that fits only the
> projector low beam on the A6 / S6.  I can't speak to the '92 - '94
> cars since mine is a '95.  The conversion kit is about $540 and
> this includes 2 9006 bulbs, transformers, wiring, and a relay.
>
> The advantage of running this in a projector headlight is that
> the light is sharply cut off on the top edge, so you really don't
> dazzle oncoming traffic.
>
> I'm very happy with the installation I've got.
>
>     - Charlie
>
>
>   Charlie Smith   charlie at elektro.cmhnet.org  614-471-1418
>   http://www.elektro.com/~charlie      Columbus Ohio   USA
>   http://www.elektro.com/~audi     photos & technical info
>
>   95 S6 Quattro  -  24 PSI, RS2 6 speed, and other features
>   96 Dodge Ram   -  30 PSI, w/Cummins turbo diesel
>
>
>
>
>
>
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