Re: [Amc-list] EFI on 195.6OHV...

[Frank Swygert <farna@xxxxxxx>]

The TB itself has the TPS and a couple other sensors on it, you would just need a manifold air pressure (MAP), manifold air temp (MAT), and engine temp sensor I believe. Run the harness down the left inner fender then over to the TB. Would be one bundle of 10 or so wires. They could all splay out from where it crosses the gap from fender to engine if you mount the MAP on the inner fender near the crossing point. You can use a GM computer with custom chip for cheap, but would be stuck with the programmed parameters. Should be fine unless you plan on changing things, but the MegaSquirt wouldn't be a lot more and would be very flexible. The GM computer can be easily programmed to ignore the distributor and other items though -- not hard to dumb it down! I can't do it, but there are several places that burn custom chips based on your inputs. 

You have so much luck with carbs because you don't ask them to do a whole lot! The temp range you work in isn't that great most of the time. You do have a lot of altitude change in your trips, but not usually for long. Driving with one in cold weather is no fun at all! EFI rocks for that!! I know my J-10 carb is crap (still need to fix that!!), but there's just no comparison with any carb vehicle I've ever owned with the near instant-on EFI. Don't have to warm it up for five minutes on real cold days before driving, just give it 30-60 seconds to get oil and coolant slightly warmed and flowing good and drive off, without worry about it choking down, choke not set right, fast idle set right, etc. If I lived in a more moderate climate (not that it's bad in SC -- only a few really cold days!) I could live with carbs much easier too! 



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Date: Thu, 03 Jan 2008 19:59:37 -0800
From: Tom Jennings <tomj@xxxxxxx>

But a little TBI with oxygen and coolant sensors, and one small box, maybe 
I could live with that if it gave me SUBSTANTIALLY increased mileage. I 
don't really care about a big increase in power. I have carbs down, my carb 
cars always start perfectly and run great (as great as carbs ever do)

>From what I read I worry about idle problems, and hours upon hours of 
laptop fiddling maps. Playing with computers stopped amusing me a decade 
ago...

But I'm again doing online research (and your page last night; if I go this 
route I'll probably buy preassembled!).

I don't like the high-pressure fuel plumbing I'd have to do. I also don't 
understand why everyone says I must increase fuel delivery line size, when 
I am not going to be consuming more lbs/hour of fuel; probably less! I have 
vacuum wipers and will keep them; it's gotta work with that. It's gotta 
work with an old-style distributor (with Pertronix). Etc....

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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