Fwd: Re: [Shotimes] Re: upgrading bulbs in headlights...update
on Summit harness
cmichaelo@optonline.net
cmichaelo@optonline.net
Tue, 16 Nov 2004 11:38:17 -0500
OK, so I finally got a reply from Summit on their wiring harness.
My questions to Summit were:
----------------------------------------------------------------
I have a few questions about your headlight wiring harness kit (sum-890031):
- Does it come with a fuse holder?
- What size wires (gauge) does it use?
- Is it meant to be directly connected to the battery?
Summit's response was:
---------------------------------------------------------------
Response (Mark) - 11/16/2004 10:48 AM
Michael,
The SUM-890031 wiring harness connects directly to your vehicles battery, to provide power, through relays, to the high output headlights. It includes 16 gauge wire and no fuse holder.
So based on this info I will NOT buy the Summit harness since it doesn't come with fuse holders and 16-gauge wire is not good enough IMO.
Assuming a maximum length of 10 foot 16-gauge wire is needed to properly route a wire from the battery to the headlight (and remember, some people have batteries in the trunk), a current of 10A (100W bulbs at ~14V) through such a wire would yield a voltage drop of 0.4V.
A 14-gauge wire would present a 0.25V drop.
A 12-gauge wire would present a 0.16V drop.
Michael
94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html
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Date: Tue, 09 Nov 2004 19:20:11 -0500
From: cmichaelo@optonline.net
Subject: Re: [Shotimes] Re: upgrading bulbs in headlights
To: Ian Fisher <dataflash@yahoo.com>
Cc: shotimes@autox.team.net
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Ian, the only pic I have is the one in the catalog. And based on comparing that pic to the pic from the Competition Limited, they look to be the same.
I have sent Summit a question about this harness, asking them if it has a built-in fuse and what size/gage wires they are using.
I'll let you know what I learn.
Michael
94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
SHO items for sale: http://hometown.aol.com/cmichaelo/for_sale.html
----- Original Message -----
From: Ian Fisher <dataflash@yahoo.com>
Date: Tuesday, November 9, 2004 6:22 pm
Subject: Re: [Shotimes] Re: upgrading bulbs in headlights
> I haven't seen a pic of the summit one but would be
> willing to try it out once I do. Do you have a picture
> of it? The Summit site didn't show one..
>
> Ian
>
> >
> > On Tue, November 9, 2004 3:53 pm,
> > cmichaelo@optonline.net said:
> > > Just out of curiosity, I decided to measure the
> > voltage at the headlights.
> > > It was an amazingly low 10.2V (both headlights
> > on), while the battery
> > > voltage was 12.4V. So 2.2V is lost in the wiring
> > harness, relay, contact
> > > points, switches, etc.
> > >
> > > So with a "perfect" wiring harness and by
> > eliminating other spurious
> > > voltage drops, let's say the voltage at the
> > headlights can be increased to
> > > 12.2V.
> > >
> > > That would mean an increase in light output power
> > by 43%, assuming the
> > > light power is proportional to the square of the
> > voltage across the bulb.
> > >
> > > The wiring harness at Summit seems to be identical
> > to the one at
> > > Comptetition Limited, except it's $10 less at
> > $39.99. Anyone tried the
> > > Summit one yet?
> > >
> > > Michael
> > > 94MTX,green,BOS+,Koni/Intrax,Baer,Corbeau
> > > SHO items for sale:
> > http://hometown.aol.com/cmichaelo/for_sale.html
> > >
> > > ----- Original Message -----
> > > From: MonsieurBoo@aol.com
> > > Date: Sunday, November 7, 2004 10:13 am
> > > Subject: [Shotimes] Re: upgrading bulbs in
> > headlights
> > >
> > >> I wouldn't necessarily single out the SHO,
> > generically, but my own
> > >> one could
> > >> sure use this upgrade. I thought it was just my
> > advancing age.
> > >> Polishing
> > >> plexi has no fears for me since I've polished
> > many a cycle fairing
> > >> windscreen
> > >> and helmet faceshield. Nor does this
> > straightforward upgrade
> > >> exceed my
> > >> electrical skills, but some specific details from
> > those who've
> > >> BTDT would be great!
> > >>
> > >> It seems like the pros are saying don't just hook
> > the grounds to
> > >> sheet metal
> > >> if you have a better choice. Makes perfect sense
> > to me. They
> > >> suggest (in
> > >> general) alternator housing or batt neg term.
> > Both seem messy in
> > >> terms of
> > >> running yet more wiring to those particular
> > places. Where else
> > >> would be a good
> > >> and secure place in the front of a GenII?
> > >>
> > >> Also where in the GenII engine bay is the
> > connector for the hi/lo
> > >> wires that
> > >> come out of the headlight switch? That kind of
> > stuff translates
> > >> poorly from
> > >> the manual to reality unless they have a clear
> > pix at the right
> > >> distance and
> > >> angle ;-)
> > >>
> > >> Any good spots for mounting the relays?
> > >>
> > >> TIA
> > >> Mark LaBarre
> > >> 94 atx 125k
> > >> _______________________________________________
> > >> Shotimes mailing list
> > >> Shotimes@autox.team.net
> > >> http://www.team.net/mailman/listinfo/shotimes
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>
>
>
>
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