Winter Upgrade - Megasquirt

[bobcowan]

I don't think MS does multiple sparks, either.

I planon using the Ford EDIS-8 system, and getting rid of the distributer from the ignition system. That's supposed to good for up 8,000 rpm's, and a good aftermarket coil will produce a really hot spark over 7,500. Although CD boxes are available, I'm not sure they're a big advantage with EDIS - especially considering the cost.

Regarding the EDIS, I found this in the MSIII documentation: "It is important to be aware that while Ford EDIS and GM DIS both have special toothed wheels, the module handles all the decoding and presents a signal to the Megasquirt that looks like a distributor input. With these two modules, the Megasquirt does not know or care how many teeth are actually on the wheel, so do not use the "trigger wheel" setting. This also means that normally you cannot use sequential fuel with these systems as no engine position information is available to the Megasquirt. "


Looking at the comparison chart, I'm not finding any compelling reason to use III. And some good reasons to use the II. Oddly enough, the II does not have a fan control, and the III does not. How odd. But, you could probably configure one of the switch outputs (of which there are many) to control the fan relay.

Megasquirt Product Comparison

I'll probably save the dough and use the II, with a Ford EDIS module. Decent price, good performance, and good reliability.

[Luce]

Well, MS2 doesn't have a hardwired dedicated fan control, you can add a 2n222 transistor to (I forgot which one I used) one of the 3 LED's and set it to turn on at a temp point and off at a temp point and wire it to a relay. The setup is super easy in Megatune. It works with my sim card. I made a controller box to PMW my fan below meltdown, and incorporated a relay so if it fails, MS can step in and save the day. Lonestar Classics Forums • View topic - Using my other hobby.

For 40 bucks or so, you can get a simulator that has an oscillator that acts like a distributor signal. An it has 5 or so pots that pretend to be the air temp sensor, coolant sensor, O2 sensor, tac speed, and throttle position. With this, you can simulate all of the sensors to verify that the box is working.

If you wanted to, you could set a relay to turn on the blinker if the RPMs were above 5000, water temp is below 200, and atmospheric pressure is above .95 KPa. That's what I like about MS.