this may seem a bit daft to some of you die hards on here, but sod it here goes anyway.As we all know the low beam is crap and this set me thinking cos I've a spare set in the garage-- could the high beam reflector be modified to take a standard H4 hi/lo lamp, as if I'm right it's the position of the lamp filament that alters the beam pattern. if it's though to be worth doin then I may have a go--- I know it'll mean altering the hieght and spread of the hi beam reflector but I just wondered and the wiring mods aren't a problem.

 

 

 

 

 

 

Pete

 

:)

then what you going to use for a main beam?

 

Its the glass infront of the light which does the spread, so no matter what you do to the bulb the glass will spread it the same as high beam which will be too high too wide to pass an MOT.

they would be twin filament so hi and lo would remain, just a small wiring mod. As for the glass lense I agree it does alter the beam height and spread but this is relative to the position of the light source behind the lense. have looked at several headlights on other cars and the glass lense pattern is fairly uniform in their layout. if you look at a standard h4 hi/lo lamp then 1 filament is near the top of the glass bulb along the centre line and the tip is darkened out whilst the other filament sits below the centre line with nothing in front to diffuse the light, so in theory when each filament is powered up the light source to the lense shifts about 5mm.

 

Anyway it was only an idea-- possibly a bad one but worth asking

 

 

 

 

pete :)

So would the dip and the mod on the other light be on at the same time?

 

If so I heard you cant have quad light on at the same time. If you look at most cars with quad lights, one tends to be the side light which doubled as a main beam and the other the dip.

 

Stuart

that doesn't really matter at this point, but for the sake of the discussion then yes and it's very easy to modify the wiring to switch 2 lights ,but this is detracting from the original question

 

 

 

 

 

 

 

pete:)

Originally posted by SRRAE

then what you going to use for a main beam?

 

Its the glass infront of the light which does the spread, so no matter what you do to the bulb the glass will spread it the same as high beam which will be too high too wide to pass an MOT.

 

 

Nope, the glass has very little to do with the spread of light, it's the parabolic reflector behind the filament which does the work.

Interesting theory, Kierash.

 

If it can be done dipped beam could by way improved as there are better upgraded bulbs in the H4 fitment (ie Osram Silverstar - AutoExpress test winner at only £16 a set:D ). Also the bigger reflector used for the main beam should produce a better, brighter light area in front of the car.

 

Perhaps the projector beam for the current dipped lights could then be wired as a fog/spot light if the aim was lowered sufficiently?

richard, that's what I've been thinking about myself, but wanted to run it across the forum for opinions first. I didn't want to start cutting up and modifying a perfectly good set of spares for someone to come along and say been there done that don't work.

 

 

 

 

 

 

 

 

Pete:)

Hi good idea

easy-er to fit PIAA bulbs:D

brings some light onto the road

Saves all the time & effort!

Arthur

If you can do it I think it might be worth it, and what's to loose apart from a head light.

 

Can you use the shaped metal bulb holder from another headlight and make it fit the Z light?

sod it, I think I'll try it anyway.

 

 

 

 

 

 

 

 

 

 

 

 

Pete:)

hi Pete

 

Hows this for a suggestion?

 

Looking at an earlier post (still on current pages of forum) you could unscrew the bulb holder part (which holds the H1 main beam bulb) from the back of the reflector and replace it with the H4 holder from the semi-sealed beam unit used in the MR2/Celica/Supra.......

 

If you are trying anyway.....;)

 

Richard