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spuggy spuggy is offline
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Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 2,841
With a slant, you'll probably have DOT-approved 5.75" sealed beam units.

Two steps:

1) Ditch them, and use E-code Cibie or Hella reflectors that take H4 bulbs. You won't believe the difference. Especially if your sealed beams are old and they've been depositing inside the glass...

2) Build your own wiring harness (using heavy-gauge wire), feeding the lamps directly from the battery via relays. (Better yet would be the alternator, but it's in the wrong end of the car on a 911...)

This will minimise voltage drop to the bulbs, and stop putting significant current through the headlamp switch and the steering column stalk. Both of these are a Very Good Thing.

As a bonus, you can run non-street legal higher output bulbs without melting everything in the stock loom. You won't need to.

My 944 had the DOT sealed beam units. Sometimes, if it were raining, I'd think the headlamps weren't on. Here's the difference in light output on a 944 with the above modifications (and running the lights directly off the alternator with a tweaked voltage regulator):

IceShark (RIP) no longer makes the harnesses, but you can buy the parts you need from Daniel Stern:
'77 S with '78 930 power and a few other things.

Last edited by spuggy; 03-23-2008 at 01:36 PM.. Reason: Fixed the Rennlist URL.
Old 03-23-2008, 01:35 PM
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