My latest Megasquirt install, MS2 w/ITBs, wasted spark, relay board and custom harness Options

[aircooledtechguy]

Megasquirt EFI is an amazingly capable system that is 100% tuneable. It is, however a mis-understood system and many of it's detractors have either not actually used it themselves or have used a cobbled together system of mis-matched parts. After 8 year of working with Megasquirt and doing installs, I have found that buying a complete, well engineered system with a quality harness is key to success. Also having an expert tuner can't hurt either.

Some may know that I work closely with Mario Velotta from The Dub Shop for all my Megasquirt parts and kits as well as tuning help. Here's a very typical install of one of his kits. You don't need the buy the most expensive kits to get a great running car and Mario will not up-sell you things you don't need for your application.

This install was on a 914 2.0L that had factory D-jetronic. Normally we would keep it plenum based re-using much of the factory parts, but with the TB badly worn and this clients desire to clean-up the engine bay, so we went with 40mm ITBs with modern 32# injectors. Ignition is a crank triggered (36-1 wheel mounted behind the fan w/ a bracket and hall sensor) using a coil pack and 8mm plug wires. Exhaust sampling is with an Innovate LC2 All sensors are wired through custom made harnesses. These feed into a relay board. This relay board is not a piece that is 100% necessary to use, but I feel it simplifies and cleans-up the install by getting all fuses and relays used into one neat, clean compact footprint.

The install took about 2 days. This included careful removal of the old D-jet system and installation of all the components is the new system. We chose to mount this system in the fwd, right end of the rear trunk. Probably the most difficult part of the install was installing the hall sensor bracket with the engine in place. While totally doable, it was a tedious part of the job.

Mario came out to assist in the in-car tuning. The result of a 2-2.5 hour drive is smooth as silk driving from idle to red line, under light throttle or heavy. Acceleration is smooth. No bucking, burping or farting Here is a short video of the test-drive and an over view of the install.

https://www.youtube.com/watch?v=e9rcczRTG_M...e=youtube_gdata

[Michelj13]

Awesome. I have about 600 miles on my MS system and love it. It starts up so easily, no fuel smells. Only complaint is a noisy fuel pump. I needed to raise idle spped to about 1050rpm to mask the fuel pump noise.

Do you have photos of fuel pump installation?

[aircooledtechguy]

Awesome. I have about 600 miles on my MS system and love it. It starts up so easily, no fuel smells. Only complaint is a noisy fuel pump. I needed to raise idle spped to about 1050rpm to mask the fuel pump noise.

Do you have photos of fuel pump installation?

Normally, if there was an old 3-port pump, this would be replaced by a Walbro pump which is a great pump, but they are pretty loud. Fortunately, this car already had a Bosch L-jet style pump mounted in the factory location under the tank (it was a '76 model) that appeared to be perfect shape, so we kept it in place working with it's original wiring.

I have a Walbro pump on my own car and am familiar with these noisy pumps. I was able to quiet mine down some by using the foam sleeve between the mounting clamps. I also used the rubber isolators that VW/Porsche used to mount their factory pumps to the chassis. Mine is now just a bit louder that the factory Bosch pump.