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> Guagues, Which are most useful?
GTeener
post Jul 1 2004, 11:51 AM
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I already have the /6 dash guagues but not the center console guages (voltmeter & oil temp).

I am not totally sure my oil pressure guague works properly, but I digress...

What I want to know is, would it be be advantageous to have all these guagues (and working of course)?

What are the most important secondary guagues (not Spedo & Tach) for these cars?
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lapuwali
post Jul 1 2004, 12:24 PM
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Discussed recently, and there are a lot of opinions. IMHO, more info is always better, as you can (with experience) diagnose a budding problem by checking gauges against each other.

At a minimum, some temp gauge (oil or CHT) and some indication of oil pressure (light or gauge). A voltmeter is a nice to have, but the alt light will get you 90% of the way there, with some failed system usually telling you there's an electrical problem w/o requiring a voltmeter.

I would go with a CHT over an oil temp gauge, if the choice comes down to that. I'd have a temp gauge over a pressure gauge, between those two (but I'd at least have a light for pressure).

Why do you feel your oil pressure gauge isn't working? What readings are you getting?
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SirAndy
post Jul 1 2004, 12:33 PM
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oil idiot light
oil pressure
oil temp
oil level
CHT (dunno which one on a /6)
volt meter
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lapuwali
post Jul 1 2004, 12:46 PM
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The 911 oil level gauge is pretty useless. Really, checking the oil level at all in any way on a dry sump engine is trickier than most people give credit for. The level in the tank will change very significantly depending on whether or not the engine is running, how hot it is, and how long it was sitting since it was last started.

As for CHT, the same VDO spark plug ring usable on the four or the Bug can be used, and I'd venture that the driver's side rearmost cylinder is the one to check, as it's nearest the oil cooler.
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J P Stein
post Jul 1 2004, 02:08 PM
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Oil pressure, oil temp.....the rest is window dressing....including the tach & speedo.

Even tho I try to remember to do it, I've never looked at any gauge during an AX pass....maybe next week (IMG:style_emoticons/default/biggrin.gif)
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GTeener
post Jul 1 2004, 02:41 PM
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QUOTE(lapuwali @ Jul 1 2004, 10:24 AM)
Why do you feel your oil pressure gauge isn't working? What readings are you getting?

Because I don't think I've ever seen it move very far to the right, not even half way I don't think (IMG:style_emoticons/default/confused24.gif)
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GTeener
post Jul 1 2004, 03:01 PM
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QUOTE(lapuwali @ Jul 1 2004, 10:24 AM)
At a minimum, some temp gauge (oil or CHT) and some indication of oil pressure (light or gauge). A voltmeter is a nice to have, but the alt light will get you 90% of the way there, with some failed system usually telling you there's an electrical problem w/o requiring a voltmeter.

I would go with a CHT over an oil temp gauge, if the choice comes down to that. I'd have a temp gauge over a pressure gauge, between those two (but I'd at least have a light for pressure).

What's a CHT (IMG:style_emoticons/default/icon14.gif)

I'm a visual person, anyone have pix of the various compatible guagues?
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Andyrew
post Jul 1 2004, 03:04 PM
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CHT= Cylander Head Temp..

Critical guage..
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GTeener
post Jul 1 2004, 03:22 PM
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QUOTE(Andyrew @ Jul 1 2004, 01:04 PM)
CHT= Cylander Head Temp..

Critical guage..

Thanks. What's it look like?
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tat2dphreak
post Jul 1 2004, 03:32 PM
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CHT,oil temp, oil press. (light ok)
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Jeroen
post Jul 1 2004, 04:49 PM
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QUOTE(lapuwali @ Jul 1 2004, 07:46 PM)
The 911 oil level gauge is pretty useless. Really, checking the oil level at all in any way on a dry sump engine is trickier than most people give credit for. The level in the tank will change very significantly depending on whether or not the engine is running, how hot it is, and how long it was sitting since it was last started. .

The fact that people don't know how to read it doesn't mean the 911 oil level gauge doesn't work (IMG:style_emoticons/default/biggrin.gif)

A dry sump engine will only give a good reading (either gauge or dipstick) when the oil is up to operating temps, the engine is idling and the car is sitting on a level surface.
The gauge may not give you an exact measurement, but it gives a very close indication on your oil level

cheers,

Jeroen
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lapuwali
post Jul 1 2004, 05:22 PM
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I think my point is, if you have to be sitting stopped on a level surface, why even have a gauge? The dipstick is adequate, the level gauge superfluous.

You can see a photo of the CHT gauge on aircooled.net (electrical/gauges). The aftermarket VDO is the item in question. Reads in degrees F. Fast responding and very useful to tell you you're about to drop a valve seat...
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GTeener
post Jul 1 2004, 05:38 PM
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Is this a good price? Can they be found used and function reliably?


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mistro
post Jul 1 2004, 05:39 PM
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... CHT gauge ... Fast responding and very useful to tell you you're about to drop a valve seat...

How does it warn you? Sudden increase in temperature?
Rgds, Michael
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SirAndy
post Jul 1 2004, 05:45 PM
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QUOTE(GTeener @ Jul 1 2004, 04:38 PM)
Can they be found used and function reliably?

while this all reads fine i think someone should make a nicer one that automatically takes ambient temperature into consideration. can't be too difficult.

maybe even a nice LCD display with 4 rows, one for each cylinder ...
(IMG:style_emoticons/default/idea.gif) Andy
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GTeener
post Jul 1 2004, 05:46 PM
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QUOTE(SirAndy @ Jul 1 2004, 10:33 AM)
oil idiot light
oil pressure
oil temp
oil level
CHT (dunno which one on a /6)
volt meter

In thi$ order of importance (on a budget) (IMG:style_emoticons/default/icon14.gif)
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lapuwali
post Jul 1 2004, 05:53 PM
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Not necessarily a sudden increase. Bad things happen if the heads get above 450dF. Normally, they should be no higher than 350dF. The temperature varies widely based on load. It can be as low as 250dF on a fully-warmed up engine while idling, up to 400dF when pulling up a steep hill at low revs.

$100 is about average in price. All of the expense is in the gauge. You'll see they also sell just the sender for only $15.

Andy, I agree on the nice display with temperature compensation. I'm working on it. Not four numbers, as I think just monitoring the hottest cylinder is adequate (and I want to keep it small, perhaps three 7-segment digits on the tach face). Just can't seem to find the necessary circular tuit.
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SirAndy
post Jul 1 2004, 07:15 PM
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QUOTE(lapuwali @ Jul 1 2004, 04:53 PM)
Andy, I agree on the nice display with temperature compensation. I'm working on it. Not four numbers, as I think just monitoring the hottest cylinder is adequate (and I want to keep it small, perhaps three 7-segment digits on the tach face). Just can't seem to find the necessary circular tuit.

what about this layout?

(can you tell i have way too much time on my hands? (IMG:style_emoticons/default/biggrin.gif) )


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TimT
post Jul 1 2004, 07:28 PM
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I look at one maybe two gauges....

oil pressure, and oil temp

I shift when I bounce on the rev limiter...

I have a wide band O2 gauge that isnt a permanent mount..

few gauges just whats important

Andy you can get a similar gauge to what you posted from Aircraft Spruce...

individual CHT or EGT or A/F...
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SirAndy
post Jul 1 2004, 07:59 PM
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QUOTE(TimT @ Jul 1 2004, 06:28 PM)
Andy you can get a similar gauge to what you posted from Aircraft Spruce...

damm, just when i tought about getting into gauge design ...
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