Might just want to toss it and get an MS-3x

I went down the same road with a Tec 1 system that Electromotive no longer supports. Searched from coast to coast for someone that had the DOS based tuning program and had no luck what so ever. I personally do not have a bias but many tuners refuse to tune Electromotive. Might be related to lack of support on these old units. Frustrating.

Same goes for the old Motec M8 and M48, both DOS-based and requiring serial port cables to interface to your PC. And most USB-serial adapters don't work with it.

Even if you can get the old Electromotive TEC-1 or Motec software, you then have to have a 10+ year old notebook computer running Windows 98 (maybe XP) to run the DOS-based program, and the computer has to have a serial port.

And you're still working with no manufacturer support because they consider it obsolete .

Come to think of it, that's pretty much how Bosch treats CIS...

I've thought about this before. I'm all for aftermarket EFI but I worry things will go obsolete requiring complete reconfigs and $$$!

Thanks to all for the feed back. Now i do not feel I am the only one with this problem, just have out of date ( expensive) stuff ready for the junk pile.

But isn't that the same position we're in with CIS?
Obsolete, only supported for $$$$ by Bosch/Porsche.
I understand the MFI stuff is just as expensive to get remanufactured properly, too.

Thats one other thing i really liked about the megasquirt when i was making my decision. It's really easy to upgrade and all of it open source software. There are more and more race teams switching over to it also for pretty much the same reason.

Yes sir, Sir Chris.

I guess my fear is, is I'll run into a similar situation where my MegaSquirt is obsolete and I'll have to run totally different parts, ECU, and sensors - nothing will be compatible any longer.

I already outgrew Motronic in my Carrera. I had to go aftermarket - which I'm glad I did!

i dont think you'll have to worry about that MS seems to always just improve and keep all the old programming.

I guess I am late to the party here but I will still offer my $0.02.

I have installed many EFI systems for friends in the area. It is now about 8 years and counting using the Megasquirt systems. I find them to be highly capable and easily configurable if you have some knowledge in electronics. The good news is that revision improvements lessen the background knowledge required to get started.

I think that with any EFI conversion you should have a basic understanding of how fuel and air mix together to make an engine run. The best system for you depends on your own abilities or more importantly, the knowledge base of the installer and tuner. Everyone has their favorites and are comfortable to attack any problems that arise. I am sure this is the reason Chris uses AEM.

There are ways to install EFI to a 930 on a budget. Its still not a few hundred dollars as the individual parts all add up. For example, A baseline MS2 system with wiring, all the connectors, WBO2 system and miscellaneous fuel line related hardware connections about $1400 if you shop carefully using different vendors. This assumes you will piece the system together yourself.

The next expense comes by adding EFI injectors. This can be as simple as drilling your CIS injector blocks, adding adapters, using aftermarket fuel blocks or going all out with a 3.2 or 964 manifold setup. Lots of options that range from about $300 to $1400 or so.

The last key is ignition integration. A simple system would use the existing CDI, distributor and its own vacuum pots for boost retard and vacuum advance. With MS systems you can use an aftermarket crank pulley, send the signal to the ECU and then send timing back to the CDI (or MSD, etc) and Distributor. Cost here is under $300. Alternatives include Ford EDIS coil packs, direct drive coils, COP, etc. These all add cost with EDIS the least expensive Its probably the most reliable thing Ford/Motorcraft has produced and it is easily integrated into an EFI system.

So, $1400 in parts related to electronics, $300 for fuel rails and injector block modification, Another $300 to integrate ignition and you have come up with about $2K in parts meaning you have a pile of boxes waiting to be installed .

The real cost of EFI is in the quality of the installation. Over the years I have seen failed installations due to poor installation, planning, wiring, etc. There are a few examples where the owners ripped it out and went back to either CIS or carbs (NA) I have also seen DIY installations with professional results. And of course, everything in between.

The last and most significant cost of EFI is tuning. Its easy to get a car running and idling. Its mostly easy to get it to drive under its own power. Moving on its it is the fun of transitioning into boost with your foot down and exploring WOT. Now, these fuel maps and spark maps are a 3D table with rpm, load (defined in different ways) and a trim or advance value. It is knowing where to run rich, how lean can you run? advancing timing when slightly lean and no load to get mileage. Are you going to make the decisions or let a shop handle the tuning? There are plenty of resources available that will help you through this process. Do you have the time to absorb and implement the processes?

Truly, the real cost is tuning - time spent driving, tuning or sending the car to a qualified person who gives you the full HP experience and the idle, and the throttle response, and the tip-in, and the part load, and the... Well you get the idea.

If it were me on the fence about an EFI conversion I would jump to the other side and never look back. You will not be disappointed.

Find someone in your area and do a comparison of a CIS car to an EFI car. There really is no comparison.

I would be all in, but I love the sound of pop.pop.pop.pop and rumbling on decel, etc. My car only weighs in at about 2200 lbs, and although relatively anemic at 345 hp, it still pulls like a raped ape once it hits about 3500 rpm. Does the increased throttle response negate the awesome analog sounds?

Sure. Just add fuel in the lowest off-throttle load section. This mimics the CIS decel valve letting the air meter drop slowly, still delivering fuel while the throttle is closed. The excess fuel will burn in the exhaust giving you either a decel rumble or a nice fire-ball. It just depends on how much you want.

Funny you say that, I just drove my Carrera tonight and I can get it to pop easily since I haven't welded my tailpipe back on to the muffler with MegaSquirt.

Just lightly touch the gas pedal so the overrun won't activate, the injectors stay firing instead of fully shut off, and it pops.

I love the sound too.

And you know how we love the fire-ball!

Jamie, I've watched a few of your threads and you seem to have good handle on the set-up, development, wiring etc,, of these systems. So I would thing that between the brain-trust and experience of Chris and you.. most of us should be able to ease into the EFI scene..

I know I'm looking forward to with at least two na motors and a Turbo build down the road. I think for me, just as many others, the big question is which equipment will suit my needs best?

Thx for the input.