I like injection. But injectors for a 368 Lincoln are hard to find and expensive. So SBC injectors are at every swap meet. Use them. First I cut out the adapters from 5/16 6061 cause that's what I had. They will be port matched as work progresses. Then the Chevy manifold is cut into 4 pieces. It's clamped to the port plate and drilled and tapped through. Flats are milled on to the ends so that I can set it upside down and drill the other four holes. I couldn't get to them upright. The flats will be cut off when it's all done. The plates are attached to the heads with countersunk screws. The injector bodies attached with 1/4-20 Allen screws. And you can see about what it will look like. still needs cosmetic work. And hoses, metering block and linkage. But the whole thing is pretty simple and a good labor day project for those with a mill and a Cl***ic V8 that needs stack injection. The pictures are all mixed up and I don't know how to get that right. But it's not rocket science. You get the idea.
I forgot to mention that I drilled and reamed a piece of hex stock 5/16 for a snug slip fit over the throttle shaft. To keep the throttles in line when drilling and tapping the 1/4-20 holes. This piece will later become two blade and slot connectors to span the gap between the front and rear bodies. Also you may have seen the same thing I did to a Packard V8 but with an old Pontiac manifold.
RichFox - Great job!!!! Looks fantastic and will be a terrific runner. Nice to see others tackle these units......
I have a '59 390 Cadillac. I'm not sure what I'll ever use it in, but I have it for when I decide! I have a T sedan I was going to put it in front of, but then I acquired a 8BA Flatty. Hahaha, damn decisions?!
If a 390 Cad is pretty much the same as a 331-365. Separate valley cover, It would be the same as the Lincoln. If you are building a banger, I guess you have seen some of the injection manifolds i have made for them. And other engines. It isn't all that hard to make a manifold. Hilborn makes all the hard parts. I just made them bolt to my engine
I have, and now I will be eye-balling the swaps for all the injection parts I can find. The ones on your four-cylinders are fantastic.
I am feeling pretty good so i thought i would start blending the adapters between the manifold and the head. I bought the cheapest Hilborns I could find and they have been ground on in the past. Not to uniformly either. But here is one done and one almost done. Now the other head.
Clever guy. I've always wondered, how do you determine injector bore size and stack height for a particular engine? Gary
For me, bore size is what ever is available. In recent years throttle plates have gotten bigger and bigger. There is no venturi and no venturi vacuum needed to draw fuel. I find the best way to really determine stack height is to run the engine on a dyno and look for fuel reversion above the stacks. The stacks should be just long enough to capture the cloud at the RPM you expect to run under load. Of course there mathematical ways to determine that. But it's not any fun.
Today I thought I would take a picture of the SBC injectors on the Lincoln Y block. With the linkage and all except for hoses and nozzles. That is about as far as I am going to get with it. So if anyone needs this stuff, make offer.
While Rich's method is the most accurate I know of, for a length to start I use the formula NL=84,000, where N is engine speed in RPM (desired peak power RPM) and L is runner length in inches (from the mouth of the stack to the head of the valve). I believe the Ramchargers came up with that formula. So desired runner length would be L=84,000 / N. For say 5,000 RPM peak it would work out 8400/5000=16.8". As Rich said, for the street, bore size is whatever you have.
Sort of. I have the 368 inch Lincoln that is pictured and also a 317 inch truck motor. Put the 3.5 inch stroke crank from the truck in the Big engine and go .060 over bore and you get a 363 inch. Just about right for "C". And the AIR roadster cl***. But that's not going to happen. Unless somebody needs a 363 inch injected Lincoln for something.
Isn't that formula for intake runner length? Keep in mind, the runner includes all the way from the back of the valve up to the tip of the stack, and shape of the port probably plays into it as well. So honestly, seeing where the cloud of fuel is, is probably not a bad way of doing it! haha Also, that packard engine is way cool! I'd love to hear one of these things run.
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