Ironically, I too just got voltmeter/oil pressure gauges. Where are you tapping into the electrical system for the voltmeter? Where are you going through the firewall for the wiring to the pressure gauge?

Thanks!
-Ryan
--
Athens, OH -- 1990 245 125k

12 gage is WAY too big for gauges except for ammeters, where the total current
flow goes THROUGH the gauge. For most gauges the biggest electrical load is
the light bulb that illuminates them. 18 or 20 gage is big enough for volt
meters (which only draw milliamps to operate), temp gauges, etc.
Like others have said, though, if it goes near the engine or the exhaust,
it needs to be somewhat heat resistant.
--
George Downs Bartlesville, Heart of the USA!

Dave is correct, 16 is plenty large enough for any gauge setup unless you get a volt meter that runs directly from, and inline with, any starting system. For that I would go to the 12. If you are not familiar with wiring it goes like this. The bigger the number the smaller the gauge. Most phone wire is around 22 gauge and most house wiring is around 14 to 12. This is the size of the wire itself and not the size of the outer coating. There are many outer coatings that are thicker than normal to increase insulation property. Wire comes in solid and stranded. Always use stranded in automotive wiring. The more the strands the better the conductivity. If you decide to do an upgrade to your headlights, ie.. include a relay and bigger wire, go to this site. http://www.danielsternlighting.com Here is great help for most automotive wiring. i am not sure but I believe there is also a formual there for figuring voltage drop over distances...:>)..Max
--
Max..1989 244 DL 5 Spd., V15 Phase II Cam Bilstein HD, Turbo Swaybars, Poly Bushings all round, Turbo Wheels, Black leather interior, Electric mirrors, LED dash and gauge lights and now NEW ECODES with the turn signals, 1992 black 244 next project

16 is fine for gauges and is much easier to route. The smaller gauge will cause a slight voltage drop in long runs but gauge wiring is short enough that it is not a factor.
--
Dave Shannon
Spring Valley, California
'63 P-210
'67 1800s
'88-240
my pages