How do you get the programs into the MegaSquirt? Do you prepare chips in an EPROM burner? Connect it to a laptop with an interface cable? Or something else? That's one thing I couldn't see answered on their web page.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

I would think the easiest way for them to set it up would be to have a flash memory similar to the bios on your pc and update it via a serial or usb cable. I don't really see how they would expect people to have or to buy an eprom burner

The MegaSquirt website is aimed primarily at people who would build the whole thing from scratch. A lot of the people who work with trying to piece together homemade fuel injection do have EPROM burners. So it's certainly possible that the MegaSquirt could work that way.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

Yea, if you can get and maintain a "well tuned carb". Not likely with a 1bbl.

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Chuck Rivers, Webmaster

Ok so does anyone here run a tbi already on there slant? I have been reading through a bunch of manuals from cars that use TBI from Dodge pickups, to mid 80's t-birds, and from what I can see the big problem will indeed be getting a computer (be it a JY donor or an aftermarket one) to run effeciently with as for sensor inputs as possible. As I don't where everyone stands on this "kit", but has anyone decided on a certain donor throttle body? From the diagrams I have looked at the double injector tbi on the early 80's dodge turcks may be a direct bolt in to the super six intake and the single injector tbi from the 2.2's and 2.5's may be a direct bolt in to the single barrel intake. I have digrams of the entire systems but there are alot of inputs and outputs that may or may not be required. Some of the TBI systems have inputs for cam position. I guess my question is has anyone identifed what dodnor thottle body would be the easiest to use and what sensors would be needed as a minimum and will the stock computer for the donor work with the extra sensors and outputs missing.

I haven't had time to check the local yards for a donor, but I am interested in anything you find that would be a direct bolt-on for the 1bbl & 2bbl (Super Six). If someone can find a good donor (easily available), then I will pick some up and start testing. I have an electronics background to the computer shouldn't be a problem. With the MegaSquirt, you connect a serial cable to the unit to download the program. I don't have one yet, so I don't know the details, but from what I read, I believe you can "fine tune" the unit in the car with a laptop. One person would drive and another would "tune" in real-time. I have everything I need for that, including programming experience. My idea is to do the tuning and then offer the MS with the pre-tuned chip.

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Chuck Rivers, Webmaster

Well, for what my input is worth.........I would strongly suggest you DO NOT use a system the requires a cam or crank position sensor/input. "We" would have to engineer, then fabricate both the trigger wheel, then modify, (I suppose), the timing cover in order to mount the sensor. While not impossible, it may be out of reach for a number of this group that doesn't have access to even the basics of machine tools.

Roger

Indeed if I could manage to get TBI fi working without anything other than the ecm and throttle body I would. The less there is the better as far as I am concerned. In fact I would even prefer an analog ecm over a prgramable one. one with a dial for mixture under idle, accel, and wot. and maybe an input for air temp and coolant temp. I don't car what comes out of the tail pipe as long as what hits the ground is burnt rubber.

I mean if we could find a donor ecm and throttle body combo that would work with little fabrication and NO changes to the ecm than I would go for that in a heartbeat.

I think a big thing for this "kit" should be price. If the entire upgrade to a TBI will be more than 500 bucks I don't think too many will go for it. as for 500 bucks you could pick up a 318 New Yorker and the SB motor mounts. Certainly thats the case for me. If when this is all planned out it's gonna cost more than 500 than I'll end up dropping the idea. Although I talked to a guy at the pick 'n pull I go to. And he loves the idea of a tbi upgrade he said I could snage all the FI bits I want off of any one car for 100cdn, ECM, throttle boddy, linkage, wires, sensors etc... If enough people are interested and we settle on a given modle I may be able to get a better deal EG 5 setups for 400 type of a thing. Anyway the key for that though would be stickin on one donor. I'll post the info I have on the two Donors I woul dlike to use when I get to work. I work at a library and have nearly every shop manual available to me. so if you name the car I can post whats in the manual about the FI stuff.

You know.......it might not be a bad idea to take a hint form Bob D's article on the batch-fire MPFI conversion. He used an '83-'85 3.8 V6 system. You may want to look into the same years, but four cylinder systems. I've noticed that it seems that all four-bangers have a throttle body, and weren't fitted with port injection. Might be worth a look.

Roger

One possibility for a readily adaptable (practically bolt on) throttle body to use with a Megasquirt would be one from a Ford Tempo/Taurus 2.3 or 2.5. This TB is a 1bbl design with a 1.75" throttle blade, two bolt mounting that matches most 1bbl carbs, a throttle position sensor, and an integral adjustable regulator. The single injector mounts at the top of a casting which easily accepts a duct for a remote air cleaner. Pictures of an exploded part are at Stan Clayton's Mustang site.

The downside is that we figure that even if you pump up the fuel pressure from the stock 30-odd psi to 45-55 psi, the stock injector will only flow enough fuel to support ~150 hp. That's more than enough for a mild engine but it would take two to handle more hp.

There were a couple of FordSix guys working on megasquirts for the 200 ford inline, but I'm not sure of the status of those projects.

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Jack Collins
66 Mustang 250 EFI
Lotus Seven Replica (Under Construction)
<img border="2" src="http://fordsix.com/locost/locostsig.jpg" width="275" height="118" >

I have a TBI on my '64 Dart and except for its marginal computer it is definitely better than a "well tuned" carb.

The MegaSquirt is programmable, even "on the fly" while its running, via a laptop computer hooked up with a COM port cable.

Vacation is nice.

Lou

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Home of Slant6-powered fun machines since 1988

Dart270
What tbi and computer did you use?

I am planning on converting my valiant to an electronic ignition setup.

I am wondering if there would be any problems using the components from the Mopar Performance conversion kit with the Megasquirt system.

What changes would need to be made to the MP setup if I use the Megasquirt controller?

John Killin

LOL, too true. The 1bbl on my (friend's) Dart is toast. So bad, it dies when accelerating into a corner.

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'74 Duster w/ HEI ignition, beat to snot suspension, A904, 8.25" 3.55 SG rear, still being tuned up and gets 17 MPG

Know how they always build a better idiot? That's me