[Diy_efi] EFI for small 4 cyl ??

[Scott Campbell]

Rick,

Start here: http://megasquirt.info/

Scott.

On Mon, 29 Mar 2004 16:19:21 -0600, comcast <r_n_dnoah at comcast.net> wrote:

> I am wondering if anyone makes a kit -or- if it is possible to DIY 
> cobble together an EFI system for the early Datsun 1200 series A engine 
> ?? I thought about just finding a system off of any Nissan and adapting 
> it (that is- manifold drilling/machining for injectors and adding 
> sensors). What I think bothers me, however, is that the 1200 engine is 
> smaller than most current Nissan engines. Might be neat to put an 
> "oversize" system on a future turbo application, but I am not going that 
> route. I am actually looking at seeing if I can increase the mileage 
> over the stock one barrel. I envision an engine that ought to be good 
> for 45 mpg yet still have some pep.
> Obviously I will also be having to go to totally data-driven electronic 
> ignition as well, but those products are much more available.
> I know that the "real" issue with EFI isn't so much the hardware but the 
> software, especially considering that the engine has no history of 
> anything but carburation to lean on. We're talking a low performance 2 
> valve per cylinder pushrod engine here (70-73). I am quite verbose in 
> software and don't think that part will be all that scary provided that 
> I can find a versatile EPROM setup that already has some sort of engine 
> management software available, so that one really only ends up making 
> fine tuning adjustments beyond hooking up the sensors and so forth.
> I think that I am fairly surprised that there don't seem to be any 
> companies that make kits for retrofitting older Datsun/Toyota..etc etc 
> motors. Well, OK, I found ONE kit that can be fitted to a Toyota, with 
> some work, but it was over $2000 ...hmmm... a bit much for a car that 
> might cost $1000 used. Seems they are really trying to make the money on 
> a lot of stuff I can make myself such as fuel 'bars' and so forth. All I 
> really need is 4 injectors and the sensors and a totally programmable 
> management unit. Pretty sure I can do the rest (I have access to lathe, 
> shaper, drillpress, TIG welder, etc). Probably have to adapt a throttle 
> body from the junkyard.
> Anyway.. any comments ???
>
> Thanks,
> Rick
>
>
>


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