adding small gauge to a tach
 

There have been several examples posted where a small gauge was added to a tach. In the Oct. Excellence (photo legend on p. 103) it says that the gauge was added to a 930 tach after the boost gauge was removed.

Is that what most people have done to add a gauge to a tach?

Does it seem like a fairly cheap DIY way to do this?

The real problem is not drilling three small holes in the tach face to install the additional movement. It's getting the scale on the face (the usual suspects use a silkscreen process) and getting the bezel ring on and off without making it look like the dog chewed on it.

I believe you can buy the tach/voltmeter combo. What combo are you thinking about?

no ho speedometer has done several different combos for us using the 930 tach idea- clock, voltmeter, a/f ratio led bar readout. you may want to contact them directly

check this thread out...
http://forums.pelicanparts.com/porsche-911-technical-forum/237637-photoshop-tach-advice-help-needed.html

Dunno. As usual, I'm just noodling around before trying anything. I have an idea to put the older (green) gauges into my '73, but a volmeter in the stock tach is also interesting -- or a vacuum gauge; or twin cyl. head temp gauges like RoninLB has on his dash or console.

Of course North Hollywood could do the tach/other combo in the traditional green for you as well as re-indexing the tach needle to put the redline at the top.

Randy, if you want green gauges the best thing to do is have one of the usual suspects re-silkscreen the faces of your current gauges:

Tach-- will not work with CDI ignition as it requires a HV pulse from coil
Speed- may not read the same from a 915 as a 901
Clock- later versions are Quartz, not mechanical/battery
Oil pressure, temperature resistance changed in 1968, sender different
Fuel-- don't know whether fuel tank capacity increased to 65L?

Thanks John - I do have a type 911 trans. tho.