I decided to machine the injector pockets on my plate for my 8-71 BBC EFI Jet Boat project. I machined the blank plate a while ago with the help of a friend who has a Haas machine.
All in all it came out great. I took my time, did some simple math and measured 3 times. I bought a 14mm injector pocket cutting tool from Ross machine. I am using 96 Lb Rochester style injectors. This took about 30 minutes or so to do. Next up fuel rail machining from Ross Machine fuel rail stock

Here is a critical part if you want your project to be straight. Indicating the fixed jaw of the vice. I am only .0003 (that is 3 tenths of a thou.) out from one edge to the other.



After Locating the edge of the part with an edgefinder I was able to use the digital readout. Here is the cutting tool ready.



After doing some simple math I found the points to where to machine the holes for the injectors. Here is the first hole spacing. Notice the Y-Axis is 0000. This is the center of the plate. This should not move during the whole process.



Notice the tink marks from the cutting tool in the alum. What I did was space out using the digital read out and then make sure I had my math correct.



Here is the first hole cut.



Checking fit up and the depth. This is critical. I had to machine, clean and check the depth a few times to where I wanted the injector to sit. I then set the Z-stop and all the other holes were all the same depth.



A few minutes later and all the holes are done for one side.



Flipped over the other side. Notice the angle plate acting as a "stop". This lets me keep the tool in the machine with out taking it out and finding the X and Y edges again.




Here is the plate mocked up with the injectors set in place.

very nice work

Good job. What efi system are ya using.

Very nice and clean

EE  Errr My 02?? stay away from the accel!!
One of my buddies tried the accel on a procharged alky sbc with terrible results!!! Not good tech support,and non linear changes. I can find out what system he changed to. It was very simple!!
 He actually kept the motor in one pc. It's a 69 camero he's gone a best of 7.02 @ 197 at 5600ft.
Another buddy with the turbo mustangs likes the FAST system. A little more involved but stable.
My 02.
Good work!!! I'll help in any way possible.

Ok today I machined the fuel rails matching the numbers on the digital readout from yesterday's injector plate machining. Rails are -10AN from Ross Machine. I have to devise a way to hold the rails to injector plate. Some sort of bracket. I might use Ross machine mounts for this.

Here we go. Cutting the fuel rails for the length I think they are going to be. I have never done this before and I am learning as I am going.



Even though my saw blade is damn near square to the saw vice I always square my materail in the Bridgeport. It just makes it easier in the long run. This also allowed me to get the rails exactly the same length. I also calculated for some "hang-over"



Another critical point to mention. The rails are round so they want to move around in the vice. You can see some square key stock I cut to hold them close to square. I finished up indicating the rails to the spindle both X and Y.



The Ross Machine tool is well worth the money. I set the depth and machined away.



Here they are all done except for the threaded ends. I need to mock up first to see if I need any trimming. Sweet huh.



Mocking up. Damn this is cool.



Sorry for the poor pic. I don't know what happened.



Yup, interference as I thought. The throttle position sensor hits. I marked it and will trim it. Good thing I left some hang-over. Once I get the length to where I want I will machine them for -10AN O-ring with the O-ring boss tool from MSC$$.

Very cool thread, very nice work, sweeeeet.

Can a bracket from the spacer to the fuel rail work for ya? It doesn't have to be a ridged mount.
Perhaps a hole where the AN fittings go through on frt and rear? I love this stuff!!! I just finished helping a guy put a snowmobile motor in a gyro-copter. Lots -o- head scatching! But fun!!!
I'm a machinist ...if ya need imput I'm only a keyboard away.

You might look into the Wolf system for fuel management.  A friend used it on a turbo Nissan in a sand rail with good results.

http://wolfems.cart.net.au/cat/3754.html

Hey Tjs, do you know if anyone makes an adapter to go from a blower manifold to a dual carb set up?

tj i must comend you, that is some beautiful f'n work

This one has 16 injectors and stainless lines instead of rails. Works awsome

Mark,
 That is a cool idea. Are the holes in the ends of the spacer plugged after you drilled the passage for the fuel. Are the Holley TBI injectors low impedence, what LB/HR are they. I am running 96 lb/HR low Impedence Rochester style injectors.
T.J.