Mentioned somewhere my mistrust and disaffection for OE instruments, geared to provide minimal relief to unwary drivers, and in the case of the P38's ECT, downright scary - having the Nano reach 117 and the needle isn't moving because it moves after 120 is worthy of distateful words for whoever designed it that way.
I always thought of getting some extra info, I reutilized my old Scangauge and fitted it where the front ashtray is, and use it to monitor IAT and ECT more precisely (at least I know better when I am going to blow!), along with fuel calculations for trip computer, VLT, etc. But this is not enough.
I have a battery of old school VDO gauges I was going to fit to my HZJ laying around inutilized, but they barely match the clean shapes of the P38 cockpit, so I decided to settle for a more sober look and just put something small where the rubber mat sits in the dashboard, and just fit up to three gauges. Now is where the fun starts.
1) has anyone ever installed or seen anything installed there? Having the dashboard out (all peeled off, I had a lot of fun with the glue!), I would like to drill and run all cables while everything is accessible. I've noticed the dash center indentation where the mat goes fits fairly well a mini MudPod, which does fit three gauges and has a similar "grain" finish to the top of the dash, ok, but the underside is taken by the ducts of the HeVAC, there is not much room to manouver. Any opinion before I drill carelessly? :-)
2) to minimize the mess but maximize the info I found that the Madman EMS is a nice pretty package, recommend you look at it. Price is hefty, but has a lot of inputs. Unfortunately, the EMS2 is out of production, its black/green dial was perfect to match the rest of the dashboard. The new EMS3 is full color like those Japanese aftermarket radios, but that is what it is. Inputs are VLT, EGT (I guess don't need this on the V8 at the time, unless I go S/C), CLD (Coolant level), ECT (Coolant temp), Oil pressure (or Boost), Oil temp, and up to 2 outputs where via relay you can activate something else, for example the condenser fans.
3) Now, I got all the wiring for the MadMan and I am wondering where to attach myself to. I will run all wires to the engine bay, but leave the EGT disconnected at the time. My plan was to wire:
a) Oil pressure - what to use? there is like no place to fit one around the filter, maybe one of these "sandwitch flanges" that fit in between filter and block?
b) Oil temp - not sure yet usually the suggestion is a plug in the sump, either drilling, or replace the sump plug with one with the sensor. I do not like any of these ideas, so I thought the following: the gearbox cooler has a temp sensor on the side (more on this later), what if I fit one to the engine oil cooler and monitor from there? I am planning to take the gearbox cooler sensor out of my donor Rangie and run it with a tester to see what response it provides ....
c) Coolant temp is fairly easy, I will select the hottest point - I think is the top hose - to have a separate reading from the sensor that feeds the Motronic (and the Nano or the Scangauge in my case). 2 readings is better than one!
d) Coolant level is also easy, I had a mate in Italy done in his D2, using BMW expansion tank with provision for a sensor and a sensor itself, wired accordingly
e) back in the day where every hot day was a dat of terror, I've spliced into the switch for the condenser fans to have the possibility to activate them manually. I will now wire this switch to the MadMan relayed output, to have the gauge directly activate the fans once a worrisome temp is detected.
Since I am not a master in electrics, anyone that wants to throw a suggestion on this ... be welcome - even a "why are you bothering?" but I have already passed that stage :-)))
Will write later about the other auxiliary gauges I am planning ...