Show me pics of volt gage install

[jclotz]

I had this gage made by Bigmark Design for about $190. Sent him a temp/fuel core and connected to an LC-1 oxygen sensor. So, all-in, the cost included the gage ($190), core ($75), and LC-1 ($200).

[93nav]

Thanks for the replys jclotz. I was not able to find Bigmark Design, are they now New Vintage USA at bigmark design Industrial design services?

[island911]

Originally Posted by keynsham1

What makes you think a digital readout is more accurate than an analogue one? it is the electronics behind it that gives it accuracy, not the display method!

Well, thanks for trying to school me there, but no... you are missing some things. Those would be resolution, parallax and that this is 2014 and sensor precision is so easy, even the Chinese do it - in mass. Resolution - A lil' 2" analog gauge might increase its resolution by focusing the scale - say, 8-16V rather than 0-20v- but still, there is the parallax. In short, a gauge is only as accurate as can be deciphered by the user.

Just curious, for your metrology needs, do you put a Vernier scale on your analog gauge needles? You know, to pull out the precision, which is actually there?

[island911]

I will add that I do actually like analog gauges, for other reasons, and have an analog volt meter on order, which I'll integrate - see how that works... But, in the back of my mind is a John Walker post; something like: 14.25v is okay, 14.5 is too much.

Can anyone here tell me that the component over-voltage protection has much higher minimums than 14.5v? ...Tach?, Speedo?, clock? Radio? CDI? . . . what kind of voltage spikes can these see w/o failure?

[Spankster]

[sdbhadzhen]

Sorry, no pics, but I removed my ashtray and bolted in a 2-gauge mounting bracket in its place (volt meter and CHT gauge from Westach).

[KTL]

Originally Posted by island911

I will add that I do actually like analog gauges, for other reasons, and have an analog volt meter on order, which I'll integrate - see how that works... But, in the back of my mind is a John Walker post; something like: 14.25v is okay, 14.5 is too much.

Can anyone here tell me that the component over-voltage protection has much higher minimums than 14.5v? ...Tach?, Speedo?, clock? Radio? CDI? . . . what kind of voltage spikes can these see w/o failure?

I agree with Glenn here that the analog gauge most have chosen (I have used it as well) lacks some responsiveness. It's so heavily damped in its motion that it's hard to see voltage fluctations. When I had a faulty voltage regulator in a "new" (reman) alternator, the voltmeter was way behind on indicating the spike. I suspect the gauge is purposely well-dampened to avoid it wiggling as a result of minor voltage fluctuation?

In response to Glenn's question about resistance to over-voltage, the only things I saw harmed by the voltage spikes were the headlights. When my voltage spiked (pegged the analog gauge) the headlight bulbs blew. I found that sort of ironic because I put a lot of work into re-wiring the headlights with relays & circuit breakers when I installed Euro H4 headlights in my '87. Everything else that got spiked still works just fine in the car years later.

BTW a good sign of an alternator voltage regulator wanting to fail is your headlights steadily flicker at idle, oh so slightly.

Mark at New Vintage USA does indeed make excellent custom gauges. Look his company up on the web at newvintageusa.com There's a "hidden page" he's got for oil temperature overlays. I say it's hidden because you can't find it by navigating from the main page. I simply knew of the overlay work he does and googled "new vintage Porsche"

911 Gauge module overlays

[island911]

Thanks Kevin. - lots of useful info, as usual.

FWIW, on the LED (see pic on post 21) has an extra benefit; I can monitor the battery voltage as I walk past in the darkness of garage. The gauge is an easy read even thru the back window. This is useful as sometimes-blink-blink, the car sits, and the battery drains from the parasitic alarm. A reminder for a drive or the battery tender.

[911 tweaks]

nice thread... any new gages folks can post...? thx

[RSBob]

Check out my avatar for volts.

Done by Mark at New Vintage

[911 tweaks]

thx rick... is your avatar pictured earlier in this thread...? = the one with a left & rt toggle switches that one can toggle thru the different gage functions...?

[HarryD]

My solution using a meter I got from my FLAPS.