Oaky Doaky! I'm not a mechanich bye any means, BUT! I do know my electronics/ resistance. Mmmmm, I think you know what your talking about; but are having a difficult time getting your point across. Check out Ohm's Law. There is no argument; this is a fact!
You mean like this? I = V/R high impedence: I = 12v/15ohms = 0.8A low impedence: I = 12v/3ohms = 4.0A So lower resistance/impedence injectors require more current. I just pulled that explaination above off of that web site. And a little update on my 430 Megasquirt project... I've been collecting fuel fittings and a fuel pressure regulator(Aeromotive A1000 w/ -10AN inlets). I just have a few more fittings to get then I can start machining my fuel rail extrusion stock I have. I'm planning on using a SPX intake. Then I'll need a pump, and a way to rig up my dual throttle body. I already have a Megasquirt to use. I'm also working on converting a stock points distributor w/ an internal pick-up and use a HEI-7 external module so that the Megasquirt can control the timing as well as fuel.
Just an update on progress. I have finished the final install of all componants in the engine compartment. The fuel pump and fuel line and plumbing in the rear of the car still needs to be done. I have all the parts for the remaining fuel system, so I might work on it during the week after work. If not, I should have the fuel system complete by next weekend. And then it will be time to fire the fuel injection system for the first time. Have fun looking at the final installation of the components under the hood. Any questions or comments are welcome. Dean
It does look great. I hope it runs well too. It looks like you're running the same regulator I'll be running. It's an Aeromotive, right? Except mine has -10AN inlets. I'm going to try and run o-ring fittings on the ends of the fuel rails. I just don't like messing with NPT if I don't have to. Fuel rail extrusion can be found here: http://www.rossmachineracing.com/extrusion.html I got 3' of the -10 stuff to make mine out of. And here's some tips on machining them: http://www.msefi.com/viewtopic.php?t=3628 http://not2fast.com/audi/5ktqa/ms-2004/ericPics/
D-con, the fuel rails are easy, all that is needed is a 47/64 drill bit to drill the injector holes, and an 1/4 npt pipe tap for the rail ends. The rail stock can be cut to length with a carbide blade in a miter box saw. Dean
I made a mistake on the drill bit size for the injector holes in the fuel rail. It is a 17/32" drill bit (.531). Dean
No, the injectors just push into the .531" hole he's talking about and they seal w/ an o-ring. The NPT threads he's using are for the fittings where the fuel line connect to the ends of the fuel rails. Dean, how did you set the height at which the injectors pushed into the rail? Just w/ how you fixed the rails position with a bracket?
I was going to make mine more like what's shown here: http://not2fast.com/audi/5ktqa/ms-2004/ericPics/hole1.jpg Also, this place rents a tool to make the holes in one fail swoop: http://kinsler.com/Cat_31_Web_HTMLs/0201234_screen53.html
69RivieraGS, I have a picture that should explain your question. I also used a larger drill bit to chamfer the injector hole to ease installation of the injectors into the holes in the fuel rail. Then polished and deburred with 400 grit sand paper. Dean
Wow, that's nice. I wasn't even planning on running any type of clip in mine. But I like how you implimented it.
Those are 1/2" e-clips from the hardware store. The injectors are very easy to remove, just loosen the screw, turn injector 180 degress and pull. The little screws are basically just to hold the injectors in place during removal of the rails from the intake manifold. Dean
Looking forward to hearing more about the project. I have been following this thread closely since I heard about Megasquirt. I am planning on Megasquirtin' the 401 in my Electra, I am in the beginning planning stages on that now.
doing one for my 401 too just curious how it will work with a 700r4 i would really like to do a 4l60e so it could be computer controlled but the mega squirt wont do that im curious if i can have a factory gm ecm reprogrammed and work the 401
They're working on it: http://www.msefi.com/viewtopic.php?t=4699 But I believe it is a second megasquirt dedicated to controlling the transmission.
yeah it does but it would be cheaper to do a holley or something of that nature to control everything there only a grand but if a gm factory may work with it would be extremley cheap
cheaper? I got my first unassembled complete megasquirt kit for $140. I built a second by scrounding up parts for ~$100.
