Re: [Amc-list] Re; EFI install on [anything modest] a bit of a Rant.

[Tom Jennings <tomj@xxxxxxx>]

On Sun, 1 Apr 2007, John Elle wrote:

> includes my self. At least 3 of the people run a 4.0 with the factory
> fuel injection.

Yeah, there's a lot of 4.0 head conversions. I ain't doin
that at this stage.

> I looked up the 2.8 Chevy TB and found for one thing, there were at
> least 5 different engine controllers called out for the S10 in 1984 on
> the page of information I was on.

I spent a lot of time lookin this up too; people have done it,
but there's no simple "how-to".

I know it's not entirely reasonable to expect a how-to for
this sort of project. It's just that between time and money
I just personally can't embark on a project of that scale,
reasonable or not. Yeah, I want my cake and eat it too.

There are a lot of GM controllers, I had a small list of them
but the map tuning is the huge vague thing. Sensors and all that,
that's largely fabrication work, that's the easy part.

Megasquirt seems the obvious solution to the controller. There's
excellent docs on sensors with it. Adapting the TBI is just
fab work. The fuel system still requires research. I assume
tight pressure regulation is the reason for circulation on
non-OEM systems.  (For OEM systems sticking the pump in the
tank with two hoses is the cheapest and easiest solution, but
I still think there may be a technically simpler solution for
add-on that doesn't require modifyin the gas tank.)

And I am not changing ignition systems again.

> My fuel injection is an engine management system too. It also runs the
> ignition.

Once you've gone native it's hard to go back. But I'm just
looking for a carburetor replacement. I'm just pickin the
low-hanging fruit, not the whole tree. I have an old car,
non-lockup auto trans, a steep axle, a big inefficient six. I
only want to replace the next-weakest link, the carb. I
already got rid of the weakest link, the weak ignition. I'm
not interested in further improvement; it has no payoff for me.

For $300 I should just buy another Weber. I may still do that.
I've learned my lesson -- this project (my Hornet) is "done"
-- if I want a new project I should build another car, rather
than saw off the branch I'm sitting on!


> Cost,
> These things are not cheap to do. I have yet to run across anyone who
> has a working system under 2 Grand, with the possible exception of some
> one who bought a donor vehicle and then stripped it for parts, which is
> probably just about the cheapest and most reliable method that I can
> come up with to obtain the parts.

Yeah, it's all really cheap, except for all the parts!

You're talking me into buying a new Weber for this car.


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