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page with H9 vs D2S bulb measurements? Also Hella 90mm

February 13 2005 at 8:22 AM
Byron  (Login brwong)

 
hey Herman, trying to find the page with the bulb measurements. couldn't find them... interested in seeing the measurements for the d2s vs h9. thanks!


    
This message has been edited by herman_sho on Feb 19, 2005 9:46 PM


 
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herman
(Login herman_sho)
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Re: page with bulb measurements?

February 13 2005, 10:31 AM 

It is on this page;

http://faqlight.carpassion.info/special-topics.htm

where u able to find a link for this it on the first page?
( I could not find it at all)


    
This message has been edited by herman_sho on Feb 25, 2005 3:10 PM


 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 13 2005, 10:54 AM 

i couldn't find that page either from the link page. thanks Herman!

by the way, do you happen to know how long the h9 filament is?


    
This message has been edited by brwong on Feb 13, 2005 11:28 AM


 
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Anonymous
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Re: page with bulb measurements?

February 13 2005, 3:03 PM 

H9 filement length should be 4.8mm, according to:

http://www.unece.org/trans/main/wp29/wp29regs1-20.html

 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 13 2005, 4:46 PM 

after doing some measurements... the d2s capsule needs to be moved further into the h9 90mm projectors by about 2.8mm. at the same time, the length of the arc is about 0.6mm shorter than the h9 filament. that being said... i'm gonna try and come up with a mounting plate that locates the capsule further into the housing. gonna see if i can add some adjustability for it to range from 3.1mm to 2.5mm for focusing purposes (the range co-relates with the ends of the h9 filament).

by the way Herman, another question. do you happen to know which direction the h9 filament is offset toward once its mounted into the projector.


    
This message has been edited by brwong on Feb 13, 2005 4:59 PM


 
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herman
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Re: page with bulb measurements?

February 13 2005, 9:30 PM 


This will move bulb in about 2mm (or however thick your backplate is) for a more ideal filament position.
The offset inside the H9 bulb, if any, is upward, so you would have to move bulb down. More than 1.5mm would not makse sense.


    
This message has been edited by herman_sho on Feb 13, 2005 9:41 PM


 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 14 2005, 10:30 AM 

er... i'm confused now. if the filament in the h9 bulb is offset upward by about 1.5mm when in the upright position (connector portion of the bulb facing vertically down). shouldn't i be offsetting the capsule 1.5mm upward within the projector?

 
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herman
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Re: page with bulb measurements?

February 14 2005, 11:19 AM 

I probably use a different reference point than u, Byron. The important thing is to move HID bulb down about 1mm. This will make more light below cutoff. The pics I have seen of H9 Hella 90mm beam pattern with bulb totally centered is that hot spot is 95% hidden behind shield. Mobing HID bulb down 1mm (maybe 1.5mm is neded) will likely make hotspot 85% hidden, which is alot better.

 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 15 2005, 1:36 PM 

ok... i'm gonna try both ways and see what happens to the beam. by the way, i disassembled the projector from my headlamp and 90mm's front glass housing... hooked it up and test to see how much i'm loosing in intensity. it was noticable! the colour at the cutoff was much more vivid and sharper with the projector "naked".

 
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herman
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Re: page with bulb measurements?

February 15 2005, 5:56 PM 

I remember that I tried with/without front shell. Almost no differnce. But I cleaned both sides of it in glass cleaner.

 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 19 2005, 7:57 PM 

ok.. just tested 2 prototype d2s holders that places it further into the housing. the intensity at the edges of the beam is brighter than the original setup i had. as you have predicted herman, place the capsule 1.5mm down yielded a better beam intensity than having it 1.5mm up. the difference between the 2 is huge.

 
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Anonymous
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Re: page with bulb measurements?

February 19 2005, 9:44 PM 

So the posistion



was advantagous compared to having it right onto baseplate?


    
This message has been edited by herman_sho on Feb 19, 2005 9:44 PM


 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 19 2005, 10:35 PM 

i have it further in than the base plate. its about 2.5mm further in from the outside surface of the base plate. and the width and intensity is definitely better than when i had it right on the base plate.

edit - the base plate is about 2mm thick.. so that means i have it about .5mm further in. not sure if .5mm would yield a noticable difference.


    
This message has been edited by brwong on Feb 20, 2005 6:55 AM


 
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herman
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Re: page with bulb measurements?

February 20 2005, 11:56 AM 

do u have a before / after picture?

 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 20 2005, 3:07 PM 

will be taking some tonight.

 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 20 2005, 7:22 PM 

ok herman, here's some shots. do pardon me for the sloppy outdoor pic of the beam, it was windy and snowing... lol my whole engine bay was covered with about 2mm of snow during the pic shots (about 10mins).

some pix of the holder.


assembled holder on hella 90


2 piece d2s holder to fit directly onto hella 90


assembled holder



initial setup - i'm using my spare d2r capsule in this pic

beam pix


initial setup - projector outside of headlamp and front glass


new d2s holder - projecto outside of headlamp and front glass

you will notice that the newer version has less foreground lighting. also notice on the newer version, the right side of the beam extends further than the initial (which as that weird step down, like as if it was fuzzy vertical cutoff).

what ya think herman?


    
This message has been edited by brwong on Feb 20, 2005 7:26 PM


 
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hermna
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Re: page with bulb measurements?

February 20 2005, 9:06 PM 

in the last picture, is both left and right headlamp turned on?
Is left side new setup and right side old setup?

If this is the case, the left side looks great. The last picture makes me really wonder how left side looks by itself?

 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 20 2005, 9:17 PM 

actually herman.. its all on 1 side only. the headlamps were not on the car. the projectors were naked. i just mounted 1 projector at a time and took pix individually. the bottom pic with, what seems like 2 peaks, is from my shield. with the new setup, my 2mm bent shield is too much.

 
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Byron
(Login brwong)

Re: page with bulb measurements?

February 21 2005, 5:35 PM 

oh herman, just noticed something about my d2s capsule. on the glass, there seem to be spots etched onto the surface. its not noticable stare perpendicular to the glass. but if you look at the glass at a tangent, the spots becomes apparent. i can't get it off with alcohol nor windex. will these spots affect the output? d'oh!!!

 
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herman
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Re: page with bulb measurements?

February 21 2005, 8:13 PM 

Hard to tell without seing it. It sounds to me like density of your spots are minimal, so its probably nothing to worry about. Try to carefully remove it with a razor blade. The glass quartz, so its actually really difficult making scratches if you are used to lexan surfaces.

 
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