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Clarke
Join Date: Aug 2011
Location: Arlington, VA
Posts: 374
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H1 vs H4
I am uneducated about Porsche headlights. I was watching a sale of a pair of H1 for 1200 dollars on the parts for sale section.
These H1 look similar to H4 to me. What is the difference, please? And what is better, this H1 or new H4? Is it a historic thing? Thanks for educating me Pelican.
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Clarke race car: 2010 GT3 (PCA-GT2) black/black street car: 1995 993 C2 black/black |
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03-30-2014, 08:24 AM
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Registered
Join Date: Jan 2003
Location: Annapolis MD
Posts: 1,020
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Clarke, The H1 design allows separate adjustment for the high and low beams. This is an advantage as you can raise up the passenger side low beam a little and still not distract oncoming traffic. You can also separately adjust the high beams to really reach out. Also, it is easy to run separate wattage bulbs in the high/low beams. But the H1s are NLA new and expensive used. The H4 are fine and can be purchased new. Most look at the H1 to being brighter and superior. There are a few things to look at when buying. $1200 seems like a good price. I got mine a few years ago in the same condition with out any damage for $800 plus spare Bosch quartz lenses, 8 bulbs, and a spare broken light for parts. Getting the parts for these lights are a *****. If you get them take care not to damage them or youll have some expensive paperweights. Also look at the adjusters to make sure the screws are not all rounded or buggered up. These are usually worn and the parts that break. If these are going into that little hot rod long hood you bought you might have to update the relay so not to toast the wiring stalk on the for the hi/lo beam.
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03-30-2014, 08:55 AM
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Clarke
Join Date: Aug 2011
Location: Arlington, VA
Posts: 374
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thanks for the explanation
__________________
Clarke race car: 2010 GT3 (PCA-GT2) black/black street car: 1995 993 C2 black/black |
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03-30-2014, 08:58 AM
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Registered
Join Date: Feb 2005
Location: Mexico
Posts: 1,961
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H1 use two H1 bulbs, have two reflectors one for low beam and one for high beam, these can be aligned separately. The form of the glass is similar to both H1 and H4, but the markings are different. If you look at pictures you will see the extra reflector in the H1. There are some variants of H1s also, flush letter markings and raised letter markings and I think there are some other differences. H1s have alignment screws for each reflector.
H1s are no longer manufactured, therefore a good pair are expensive. New H4s are manufactured by AL a Bosch branch in the Czech republic. H4 and H1   H1   H4  
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03-30-2014, 09:33 AM
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