This is the project I have been working on over the summer. I decided that Megasquirt was not running the car as good as I wanted it to. Start ups were not the best and the car would drive jerky at some points. So to get the drivability back of the stock computer I had to hook it back up. Since the stock ecu cant control fuel in boost I decided to add 4 more injectors that will be controlled by MS and only cut on in boost to add the extra fuel I need. Now the stock injectors will still be spraying fuel as well so the injectors I have will now go farther and I will be able to use ALL of the MS fuel map for boost. Before I had it half boost and half vac so my tuning will be much more precise.
Finally got everything installed over the last week and all of the leaks fixed. Took it for a spin yesterday. The car drove pretty good, has a lopy idle every now and then but settles down to 800rpms. Startups are awesome and I no longer have to pat the gas to keep it running in the morning. Car is a little jerky when the other injectors cut on and the car is still super lean but nothing tuning wont fix.
Overall Im pretty happy with the results so far, with a little tuning I believe this setup will much better than just running big injectors all the time.
Since the IM is cast alum I bought a 3/4" alum tube to fit the injectors in. Then found some alum brazing rods at harbor freight pretty cheap. Used an oxy acetylene torch to braze in the new bungs. Turned out very nice and strong. That second board on MS is controlling launch control, meth injection, and the secondary injectors.
