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)

[yarin]

Hey Dean,

Someone on MSEFI forums used a 1.3K pulldown resistor for the signal of the dizzy, i was planning on doing the same. I haven't decided if i'm going to do fuel and spark first or just start with fuel. If I trigger off the coil do I need an Ed Capacitor and Wing Diode installed? I dont want to have to modify my board too much just to get dizzy trigger working for a few days.

Are you using points or petronix?

I will be mounting my relay box behind the drivers seat in the engine compartment. The MS box will go in the dash i think. It's a race car, so there isn't much interior.

I was thinking about mounting the relax board on the lowest position, but I worried a tiny bit about electrical gapping from the relay pins to the box since its so close. Did you buy the entire box with cover? My kit didn't come with a cover. You could consider filing the side mating surfaces of the top cover and not using the side panel screws. Instead use some type of removeable strap or even hinge the cover on the base.

I'm sure i'll have a bunch of questions for you. here are a few..

Are you using the stock fast idle solenoid? Did you configure your board for PWM for low impedence injectors? What did you do for warm up enrichment? Are you using the stock CHT sensor? Can I take a look at your easytherm values and warm up enrichment tables? Which TPS did you use? Did you tune with auto-tune and a WB02?

I had some free time at work today so I created a diagram of the entire MS job with WBO2. It's 95% there, i'm sure i'll have modifications to it once I start the installation. I might build a secondary terminal box for grounds and +12V lines, I also want to run a few extra lines in the relay cable and hook them up to a breakout box to make any future additions easy.

So check out my diagram, enjoy! It's a big file!! 500K, i had to bump up the res so u can zoom in and see the 6 point text. So once you download it zoom in to 100% to see all the fine stuff. I'm pretty happy with it so far, i'm sure it will be a great help once i start wiring.

LINK HERE - 914-MS2.JPG