The Stovebolt Site Forums The Shop Area The Electrical Bay 12 volt/electronic injection conversion.

I don't know if this needs to be in the electrical or HiPo section, I am converting hilborn injection to electronic, I would really, really like to make it work on a 6 volt system somehow, but I don't really, really think that will work. I went through the tech tips, and there is a 12 volt GENERATOR, and a 12 volt ALTERNATOR, I would like to use the generator for appearance sake (why, I don't know, those six stacks bear no resemblance to a stock engine, but I am weird like that) But I have also heard the power with a generator isn't stable enough or clean enough. Any ideas?

It sounds like an interesting project. If you don't get any answers here, we can move it to the HiPo section.

Hey Brokenhead, if we all stoned all of the weirdos in here, we'd soon run out of stones.

What kind of current (amps) are you looking at?

Rusty, you are so easy today......52Carl, how in the world did you slip in............................just joking

The mid-1970's Volvo B30 engine was an inline six with Bosch electronic fuel injection. The injectors were triggered by a set of dual points riding on a cam on the distributor shaft below the breaker plate. If you can find one of those distributors you might be able to use it to fire the injectors with a minimal amount of electronics. The Volvo had a batch injection system where three injectors fired at once, and the other three were triggered on the next turn of the crankshaft. I owned a 1974 Volvo 164 with that system, and it was reliable, and spooky fast for a 4-door sedsn.
Jerry

Beltfed, I don't really know, this is pretty close to the very beginning of this project. I am pretty sure I will need to go 12 volts, and there is the need for clean power, and have heard a generator won't provide stable enough power for the electronics. There is a couple of people on here that have done EFI conversions, I was hoping to pick their brains, Or is that in the tech tips too? I have spoken to hilborn, they can convert the injector body, and provide the brains but I will have to make a spacer or something because the injectors will hit the valve cover, not to mention #6 stack hits the firewall. There are couple of other options out there for that part, but right now I am trying to determine which way to go for the power. I even contemplated using 2 6 volt batteries, charge them in parallel, but pull the power off in series, if that could be done, I'm not even sure of that. I know we used to get 12 volts out of a 48 volt battery bank by just tapping one of the 4 batteries when I worked on the boats.

I'm just spitballin' here: They do make 6v to 12v DC-DC converters. Consider driving your ECM only with one of these (there is one on eBay for <$20 that can drive 4A/48W load - you'd have to check the current draw of your computer/injectors). It says there is 40mV of ripple on the output which may or may not cause problems with your ECM. I'd put a large electrolytic capacitor on the output of the DC-DC converter if i were to try this.

I put a GM TBI system on a small block in a Camaro i built, and all of the sensors (there are only 5: IAC, O2, Temp, MAP, throttle position) were driven/monitored by the computer, so if the computer was running off the 12v then its possible the system would work. A multiport injection system may need more current, i don't know.

you could try the DC-DC converter idea before going to your twin 6V battery approach which should also work.

I don't think the entire engine management system draws much at all, but I don't know any exact numbers. Hilborns setup utilizes batch firing, which would be just fine, except I would really like sequential, just because. (yep, just weird that way) I have been looking into AEM systems, and there is a fella in arizona that does conversions too, but his are an extra $1,000. But this is good stuff, I'll check into it. And thanks for all the suggestions.

Interested if one or two injectors will work best in siamese ports? Has anyone tried?

Ed

there are people who have done this, if I recall, one does fine, due to the relatively low RPM of these engines, it just gets fired twice. Two would undoubtedly work better. I am still trying to get hold of one fella that has done this.(actually does International harvester conversions for a living) however the manufacturer doesn't really make any difference to the computer.

so I decided to bite the bullet and go with the powermaster alternator that looks just like a generator. It doesn't seem like I am going to get around going to 12 volts. Now I need to decide which way to go for the injection... Then the fun begins.