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Old 07-15-2002, 12:04 PM   #1
RugDoc2003
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Default Dimming lights with UD pully

Hey all,

I know light dimming has been an ongoing problem with an underdrive pully.
My question is, does anyone know how this affects a HID system. I'm thinking of upgrading to a system my brother just got that looks better than anything out there... but i don't want my under dirve pully to blow out the bulbs prematurely.

any help would be great.
rug
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Old 07-15-2002, 02:11 PM   #2
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i don't really see how the underdrive pulley would affect the hid system. Hid systems run on less voltage then the regular bulbs.
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Old 07-15-2002, 02:24 PM   #3
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well i wasn't worried about how much voltage it would consume...
it is the fluctuation that goes in that worries me...

the less that goes in the less the ballast has to use... but will the fluctuations burn out the bulb?

does anyone have a kit they installed and a UD pulley?

thanks all
rug
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Old 07-15-2002, 09:02 PM   #4
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get a yellow top battery - that might help
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Old 07-16-2002, 09:46 AM   #5
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Yes you have a point there, that would be your biggest concern. I'm surprised no one else has chimed in yet. I'd be surprised if no one else has done this so far. I know some pulleys are lighter than others and cause worse voltage conditions than others, so that could be a big factor too.
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Old 07-16-2002, 11:38 AM   #6
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Default Re: ttt

Quote:
Originally posted by 6Pack
I know some pulleys are lighter than others and cause worse voltage conditions than others, so that could be a big factor too.
Pulley weight has nothing to do with light dimming. This is related to the underdrive of the alternator. The solution : a lightweight pulley thats not underdrive.
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Old 07-16-2002, 12:34 PM   #7
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I just got a light weight pulley that is not underdriven from MrJosh43. He is selling them for a good price. I haven't installed mine yet, but you can find him at www.mrjosh43.com

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Old 07-16-2002, 12:55 PM   #8
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I had dimming in my lights before, Now I have a 3 pulley (not underdrive) and HID, They donīt seem affected, the bulb hasnīt gone bad, so I guess the fluctuation doesnīt affects them
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Old 07-16-2002, 01:06 PM   #9
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I have the GFB pulley set and the eaglelite HID kit and everything seems fine.
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Old 07-17-2002, 12:55 PM   #10
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thanks for the reply all...

i guess my concerned laid in the aspect of less volatage to the HID's. And if anyone had them on their UD pully system.

I know that if i just got a lightened pulley set then this wouldn't be a problem. But i don't want to get a new set and intall it.

some people state that using a special relay kit can get you better power and therefore brighter light from your HID kit. does this help in keeping the voltage at a higher level?

if anyone knows about this stuff chim in.
thanks

rug
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Old 07-17-2002, 01:23 PM   #11
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Quote:
some people state that using a special relay kit can get you better power and therefore brighter light from your HID kit. does this help in keeping the voltage at a higher level?
Iīm not sure, But I think people use a relay because when you turn on your lights they need a good amount of power to turn on, it is like a very drastic change or need of power (if you get what I mean) So they want to use a power source directly from the battery. But the voltage will not be at a higher level, and the light will not be brighter. The stock connection for my headlights have been enough for my HIDīs And like I tell you I have dimming problems (I can see it in my dash and corner bulbs, etc)

I think HIDīs are unaffected by this because they use a ballast, they have like a independent source for what they need.

I donīt know for sure, This is what I think, someone correct me if Iīm wrong.

But I havenīt had any problems with mines yet!
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Old 07-18-2002, 01:25 AM   #12
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AudioFan,

so at one point you did have a UD pulley and dimming problems that affected your dash and corner lights but not your HID's?
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Old 07-18-2002, 06:49 AM   #13
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HIDs work on gas discharge instead of a filament, they won't dim in the same manner as conventional bulbs. Once they have been started up, which requires a hgh initial current, they will drop to a nominal power consumption that is much lower than halogen bulbs. The ballast has a minimum operating voltage, usually 11V or so, as long as the voltage remains well above this the lights should stay on at constant brightness. If the voltage becomes marginal for the ballast the HIDs may then flicker or go out. Once they go off the lights would have to be turned off and back on again, this would not be particularly good for them.
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Old 07-18-2002, 07:47 PM   #14
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Quote:
so at one point you did have a UD pulley and dimming problems that affected your dash and corner lights but not your HID's?
Yes and no. I have the 3 set pulley, but they are not UD, they are lightened.

But I do have now, dimming problems, that I can see in my dash and corners, Itīs because of my sound system, when the bass hits! What Iīm trying to tell you, is that having dimming problems my HIDīs are unaffected, and I also have the H3 HID in my fogs.

What mulder said, is what I believe, Iīm not sure, but I think thatīs the way it works, very well said.
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Old 07-18-2002, 08:35 PM   #15
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Quote:
Originally posted by AudioFan


Yes and no. I have the 3 set pulley, but they are not UD, they are lightened.

But I do have now, dimming problems, that I can see in my dash and corners, Itīs because of my sound system, when the bass hits! What Iīm trying to tell you, is that having dimming problems my HIDīs are unaffected, and I also have the H3 HID in my fogs.

What mulder said, is what I believe, Iīm not sure, but I think thatīs the way it works, very well said.
It's probably not your pulley set then. What is your ampfier size (in watts I mean)? Actually what is your exact stereo configuration? You probably need a bass battery compacitor. You can get one from Clutchfield. They look pretty cool. I wanted one before even though I weren't putting enough drain on my battery.

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Old 07-19-2002, 03:27 AM   #16
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that helps alot

now i just need to find out if the voltage ever drops that low at idle or not. hmmmmmm...
i wonder if anyone knows...

maybe i'll look into measuring it and i'll post it if i get the tools.

but if anyone knows....
post away...

thanks again all.

rug
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Old 07-27-2002, 12:44 PM   #17
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Quote:
It's probably not your pulley set then
yes I know, that is what Iīm saying, I have like 1300 watts, or something like that, I already have a 1 farad capacitor.

Quote:
now i just need to find out if the voltage ever drops that low at idle or not. hmmmmmm...
No, I donīt think so, It has never happened to me, It could if you have a bad alternator! I think it would depend if you have a really big stereo or accesories that drain lots of power
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