The Car: 1997 JDM Mitsubishi Lancer Evolution IV GSR

The Basic Objective: Digital Main Gauges + Evo ECU for engine management + Center Console Touchscreen + Aftermarket HVAC w/stock HVAC controls + Pushbutton Ignition + general streamlining of the wire harness

Expounding Information: The heater core in my car ruptured. In the process of ripping one out of another vehicle, I was amazed at how large the HVAC unit is. I resolved to source a more space efficient unit, which lead me to the Hurricane series units for hot rods. They have electrically-controlled units but I want to keep my stock HVAC controls.

I currently have an Erisin ES777A (piece of junk, BTW) installed to provide audio and navigation. For one thing, I find a 7" screen mounted low terrible for safe navigation. I'd like to have navigation directions right next to my gauges. Speaking of gauges, I also want to switch from the centralized speedometer to a large centralized tachometer. All of which suggests a switch to a digital cluster.

The new Tesla S is powered by two Tegra Visual Computing Modules. This is a pretty new device so there is almost no knowledge base or user resources for it. Nvidia has some nifty developer support, including software for building a custom user interface, but that's about it. It's also not anywhere near being "plug and play", even for the hobbyist tuner/hacker IMO. In the long run, however, I expect it to have far greater support than the ISIS system due to Nvidia's size as well as the number of OEM's looking into using the system.

The ISIS Multiplex is a more mature system, but the hardware seems incredibly expensive. (another article on the system)

Here's a pic of the stock Evo IV interior:


and here is the same pic with a rough photochop of my intended mods:


The basic layout/aesthetic of my proposed dash is heavily inspired by the Lamborghini Gallardo, with the Pagani Huayra's pair of high-mounted central air vents.

All that being said:

1. Which systems is likely to be most cost-effective?
2. Which is likely to be easiest/most flexible to program?
3. Which should be easier to physically install for someone who isn't an electrician/electrical engineer?