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H5 headlights 80/100
I have an 88 Carerra and I just replaced the headlights to 80/100. I was told that there's no modifications necessary. Is this true?
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10-25-2004, 01:27 PM
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Location: TX USA
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I guess that's true if you don't mind replacing the stalk switch every couple of years!!!
You may want to read a few threads on the subject of relays, etc. ... http://forums.pelicanparts.com/search.php?action=showresults&searchid=918624&sortby=lastpost&sortorder=descending
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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10-25-2004, 01:41 PM
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H5 headlights 80/100
What do you mean by stalk switch?
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10-25-2004, 01:53 PM
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The control stalk switch is the usual term for the combination switch on the steering column that controls turn signals, headlamp flasher and high/low beam switching. It carries all of the current to the headlamps due to a major oversight/blunder by the factory engineers ... and tends to get fried every few years, leading to lots of different undesireable circumstances including a possibility of no headlamps at all!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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10-25-2004, 02:01 PM
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Oh yeah. I hear ya. I replaced one on my 84 Carrera.
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10-25-2004, 02:07 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,985
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Also, I have heard of multiple instances of people having 80/100 bulbs melt their headlights on H5s.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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10-25-2004, 02:30 PM
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so i have to open up the unit and check every now and again to make sure it's not melted! there's no fuse that would stop that from accuring?
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10-25-2004, 02:37 PM
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Go Speedracer, go!
Join Date: Aug 2002
Location: Indianapolis
Posts: 1,951
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No, they melt because H5's are mostly plastic. H4's don't melt because they are mostly metal.
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1981 SC ROW Coupe |
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10-25-2004, 03:21 PM
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I have relays on my H5s and the only issue I have had is the 9004 bulb has little 1/8" wide blade connectors and I've had it discolor a couple of the blades and it smoked one connector.
H4s are on the way. No matter what you do to the H5 its beam pattern sucks compared to the H4s. Wayne
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- "Speed kills! How fast do you want to go?" - anon. - "If More is better then Too Much is just right!!!" - Mad Mac Durgeloh -- Wayne - 87 Carrera coupe -> The pooch. |
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10-25-2004, 04:41 PM
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Diss Member
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BTW, where is the plastic on the H5s? The lense and the reflector are glass and the carrying assembly is metal. The bulb retainer is plastic but it doesn't seem to have any issues.
Wayne
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- "Speed kills! How fast do you want to go?" - anon. - "If More is better then Too Much is just right!!!" - Mad Mac Durgeloh -- Wayne - 87 Carrera coupe -> The pooch. |
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10-25-2004, 04:44 PM
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Go Speedracer, go!
Join Date: Aug 2002
Location: Indianapolis
Posts: 1,951
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What is it that melts then if they aren't plastic. When I changed the bulbs in my dad's 88 the entire back of the assembly was plastic. I just assumed it was the same as in my daily driver (which uses the H5 bulb also).
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1981 SC ROW Coupe |
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10-25-2004, 07:42 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
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It seems to me the back of the assembly is plastic, but I don't have the car to compare to now. I think part of the problem is that when it melts it fuses the bulb-n-stuff to the assembly. I'm not saying this will happen everytime, but I have heard of it happening. The fuse won't matter, it's not the wiring that melts and shorts, it's the surrounding items that are plastic that get hot from the heat of the bulb.
Read the tech or faq (can't remember which) section of www.danielsternlighting.com. He used to provide this info free, but has now gone into business. You don't need the 80/100's as long as you get good quality light. After I cleaned the inside of my H5's I felt like I had great lighting. I can't compare to H4's since I didn't switch on the 911, but I got H4's for my miata (should've on the 911) and the light pattern of H4's is much better. Rather than getting the high watt bulbs get better lights, it'll be a better investment in the long run.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa SOLD 2004 - gone but not forgotten
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10-25-2004, 09:14 PM
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Look.... what we're dancing around and not saying directly is this:
even with the stock wattages.... as delivered, the car puts all the "power" electrical load through the dinky sterring column switch. Add relays...properly wired...and you reduce the load by over a factor of 100....very low, since it will then be used as a switching ( on/off) circuit, and not a power handling circuit. H5 lens beam pattern generally sucks, so it's advisable to retrofit to Euro H4 , which reuires a plug change at the headlight. A combo of relays, H4's and even stock wattages would make a nice lighting package. You can always go bigger bulbs later.... Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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10-26-2004, 04:18 AM
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afaik stock was designed around 55/45w bulbs.
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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10-26-2004, 04:29 AM
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True enough RoninLB...but the point I was making to the original poster is that even these levels of "power" can lead to long-term distress of the steering column switch....meaning....relays are advised regardless of wattage.
Cheers, Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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10-26-2004, 05:00 AM
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Quote:
I was backing you up, I think.
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Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
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10-26-2004, 09:45 AM
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Okey dokey....sorry if I mis-understood.....
Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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10-27-2004, 05:56 AM
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