Megasquirt Progress, Main Board complete Options

[yarin]

Tonight I have completed building the main board for my MS II V.3.0 system. Thanks to those that have helped out. Once i'm all finished I will definitely post a complete "How To MegaSquirt a 914" website with pics and step by step. So far i'm still at the desk level. I've got 2.0 injection parts on the way.

I'll be using the following:

stock injectors
GM air temp sensor
stock fuel pump
summit racing manifold referenced fuel pressure regulator
stock injectors (i think 2.0s are on the way)
stock plenum / runners
stock CHT
MS Relay Board
Innovative WB02
High Current ignition driver
Stock dizzy with pertronix (hall sensor)
Stock Bosch Blue Coil
PWM Low impedence injector driver (no resistors)
Stock Cold start Valve (plan so far)
Stock throttle body with some junkyard TPS

Here is a pic of my board, took me a few hours a night every night this week. I took my time, double checked everything. So far so good!

I don't expect to have the system in the car for at least another month. I'm converting from carbs so I want to install steel fuel lines and clean some stuff up.

I'll be sure to post progress in the forums. (IMG:http://www.914world.com/bbs2/html/emoticons/smilie_pokal.gif)

[DNHunt]

One piece of advice. Plan your cable from the ECU to the relay box carefully. Try to avoid routing that leads to bends at the DB 37 connectors. This IS the weak spot of the system. The DB 37 offers very little stress relief and the solder joints can break. I had this happen in a Friday commute. Not fun. Luckily I had my laptop and I reprogrammed the VE table so MS ran with no MAP input. One of the things holding me back from building my V 3.0 board is a search for an alternative to the DB 37. A trip to Boeing surplus is in order. It is undoubtedly the best junkyard in the world.

I would go so far as to plan on having to repair that cable. In other words, think about how you can get to the ends of it to solder. Mine goes through the firewall and the hole in the firewall is not big enough for a DB 37 to go through so I have to solder with the cable in the car. The advantage is that my FI harness can be dropped with the engine or can be removed for changes.

Dave