I started yesterday morning fitting the madman to my Gen3.
Here are some photos.

- Inline coolant fitting installed in top radiator hose

- Coolant temp probe & coolant presence probe.
I cut the top radiator hose and fitted an inline plastic fitting that accepts the coolant temperature sender and coolant presence probe.
I then removed the oil pressure switch (note this switch does not give pressure readings, it merely switches off the idiot oil light on the dash when a prescribed oil pressure is achieved - at approx 30kPa in the 3.5 v6 very low!). I then fitted a brass 1/8" tee to allow me to fit a 10bar VDO pressure sender unit as well as the OEM pressure switch.

- Oil pressure switch removed and inline 'T' with pressure sender and switch fitted.
I then pulled the wire loom through from the dash and through a rubber boot in the firewall on the passenger side, and connected to all the sender units. I was sure to ground the unit on the block of the engine to ensure accurate readings, as even small voltage differences between engine block and chassis will give inaccurate readings as the sensors work on low voltage.

- Rubber boot loom access through the firewall.

- Wiring the engine

- Engine wiring finished
I then stripped the centre console to fit the unit where the ashtray was situated (never use the ashtray).I tapped power for the unit from the cigarette lighter positive, as this is activated from the ignition switch. It uses a tiny amount of power (30 mA at 13.8 volts), so the fuse should be fine.
I am going to install the oil temperature sender into the auto box sump plug, I have an adaptor the fits the M14x1,5 thread of the sump plug (which is the same as the engine sump plug), but I will only do so when I flush the auto box as per 4epikanini's post, however the wiring is pulled through to the sump plug already.
Finally I am going to cut a piece of supawood (will be sprayed matt black) to fit into the now open ashtray enclosure to fit the madman in, I am also leaving space for a single pole double throw toggle switch to allow me to monitor two oils temperatures/pressures if I want to in the future.
Last edited by Nick Gibson on Sun Nov 27, 2011 5:23 pm, edited 1 time in total.