Winter Upgrade - Megasquirt

[bobcowan]

Yeah, I really looked at the FAST system. It looks good on paper, and I'v heard a lot of good things about it. But it was the price that got me.

I had the pro's build the ECU. But I figured I could build the harnesses. I have enough experiance with EFI now that I can get it done. And there's some custom touches I wanted to do. It is definatly taking longer than I thought it would, though. Some of it is me learning some new skills. And part of it is finding time in the christmas season.

Oh, well. It's a hobby, not a job. It will get done when It gets done.

Tuning is going to be more of a challange than I thought it would be. Since I have an excellent tune already in the can, I thought it would be fairly simple to transfer over to the new ECU. But the programming scheme is completly differant. So I almost have to start from scratch. Again, not that big of a deal (I hope). It just requires me learning a new skill set. At my age....

[Luce]

Have a look over here, too, for more down and dirty ground up custom MS install and tuning. Megasquirt MSEXTRA / MS3EFI • Index page

I hate to say negative things, but electronics packaged for hotrod guys are way too limiting for me. I know what can be incorporated into the ECU, and want the option of doing just that. Did you know that from '85 (I think) on mopar put the voltage regulator into the ECU? So after you crank it up, it gives checks that it's charging, and adjust the charge for temp, run time, battery condition and a bunch of other variables. I don't want that, but shutting off the A/C compressor beyond 1/2 throttle or 3600 RPM is a nice little feature. I'm using the fist idle switch to turn the fan on full speed if engine temp hits 200 deg (if my fan speed controller isn't working). I was thinking about PWM-ing my fuel pump down when full capacity isn't needed. Also, closed loop idle air functions...Maybe it could even turn out your tail lights when your running from the cops!

[olddog]

Originally Posted by Luce

I was thinking about PWM-ing my fuel pump down when full capacity isn't needed.

Bad idea. Motors do not take kindly to rapid on off situations.

[Tom Wells]

Luce,

Here's one way to control the fuel pump: Aeromotive*|*16306 - Billet Fuel Pump Speed Controller

I've used one for ~8 years and 26K miles without problems in an EFI installation.

BTW, Google taught me what you didn't: PWM = Pulse Width Modulator

Tom