Ready to install these gauges, No drilling holes through the firewall *this time* Options

[RoadGlue]

I have an oil pressure, oil temp and CHT gauge to install and I'm not going to make a rat's next of wires in the process. (IMG:style_emoticons/default/biggrin.gif)

Is it possible to sneak all three sets of wires into the cabin alongside an existing loom?

Also, which cylinder's spark plug should I attach the CHT sensor ring to? Is number 3 the hotter one? It has been too long since I’ve wrenched consistently on these cars and I hate it when I forgot the trivial bits.

And what's considered "normal" oil pressure. 1 bar is about 14 psi. I hope to see around 40 - 60 PSI when at speed, right?

How about regular CHT temps? When should I worry?

Thank you!

[McMark]

Yes, yes yes. (IMG:style_emoticons/default/biggrin.gif) You can fit wires next the the stock loom, and if you use lube you can sometimes sneak them into the stock rubber boot. #3 is the cylinder of choice for the CHT. You have the spark plug ring, correct? There are some 'standard' mods to the ring, including bending the wire attachment point 90 degrees so that it comes straight up out of the spark plug hole. IIRC, the hole can be opened up a bit as well to make installation and removal of spark plugs easier.