Mechanical Fuel Pump Tutorial.

[426-Hemi]

So you guys, ever go to detail an engine, to add the piping from the mechanical fuel pump to the carburetor, EVEN fuel injection, and when ya go to look for the mechanical fuel pump the model has none on the engine? What ya do?
Here's the way I do it.
You have the engine:

See in the picture showing "pointing" there is no fuel pump on the model. SO, then you left high and dry, literally, OR you can add an in-line electrical fuel pump, I suppose, BUT thats not a good "detailing" of an engine, not to me at least. Or well at least not good detailing on Stock or "street rod" building.
Then, I went to look, this motor had none period, it wasn't broken off or not added at all. It simply did not have that detail made from the factory! SO, then John goes on a hunt to see what I have in my "scraps" (and yes, I have on HECK OF A PILE/Stash of scrap plastic, sheet, and shapes.)
I find I have some to use for making something.... Turns out, I have a bit of it, not only short scraps, but full lengths of stuff. You could even go as far to make this part from sprues! The best I can give ya is the following, look for some flat stock, and some round stock!
The round stock:

Turns out this was a pretty long section (over 4 inches long) that was out of my Evergreen Scale models styrene shape supply. Its .100" Rod.
You take that rod, and put a slice in it on an angle, like so:

Slice this about 3/4th across the "round" end, and about twice as long down the length of the diameter of the rod (hope that makes sense!) This slice will then be filled with the hanger. The hanger part/portion needs to be square, and able to be trimmed. As you'll see. I found what I needed in my scrap stash of really small sections of styrene plastic!
Granted, your best choice is to find something flat, rectangular to fit in the slice you cut into the rod, not extremely tight, but snug. Glue with your choice of capillary glues, (I prefer Ambroid Pro-Weld, but you can't get it anymore), SO my second choice is Tenax-7R. Allow to dry. at a 90 degree angle, remember the rod part has to "hang" and the flat rectangular part is the hanger that is mounted to the engine slightly above the crank center!

Now, you made that slice in the rod, the end of the rectangular part and down the side of the rod, has some "openings" needed filled in, trim the rectangular strip on the "top" add a small drop of CA (I prefer Krazy Glue) and a dash of baking Soda, file/sand to shape and thats done, then onto the slice down the side of the rod, do the SAME thing add CA to the slice opening, and a dash of baking soda file/sand to shape done!
See:

Now as I said, this was all done, and everything left "long". You have to go back and trim things to be in scale to the engine.

See the rod is trimmed, short, but looks about right, when you see it on the engine, you'll see what I mean by "looking right". Be sure to drill the hole(s) for the fuel line to the carburetor, or fuel injection, as well as the hole doe the supply from fuel tank! As once on the engine, its a bit more difficult to do at that time (My first one taught me that issue!). The rectangular part however leave LONG! It has to fit into a oblong hole made into the engine block to fit it and then be filled in around.
Here is the oblong hole in the block, notice the location, slightly above the crank and below where the fan pulley/cam is located.

Now, what it looks like in place, and have had filler added. I had to go back and repaint the engine block to match, and then go and paint the fuel pump.

And now painted:

 

Edited August 31, 2016 by 426-Hemi
New Link Update

[426-Hemi]

Then, I mentioned to drill the holes for the supply and carburetor fuel lines. Here they are:

Then, I went ahead and made the fuel line from the pump, to the carburetor.

I bent my own line, and made my own fuel filter "in-line", and added it and then went back and painted the line a aluminum color, as the real counterpart would have been.
Difficult to give a "shopping" list when most of this was "scraps" I had laying around.
The rod is Evergreen Scale Models Styrene plastic Rod thats .100 inch in diameter. The rectangular stuff, is scraps, chosen by its size, to match that of the engine in 1/25th scale!
Hope this helps! Enjoy.....

Edited August 31, 2016 by 426-Hemi
New Link Update

[southpier]

nice; clear & concise.

[426-Hemi]

Thanks Joe! I do my best to keep it simple and understandable! Hope that it helps someone other then me detailing.....

[Darren B]

Thank you very much I love these tuts that use common model supplies and have a professional end result. thank you for sharing it with us.

[vintagercr]

That is a nice tutorial

[BigTallDad]

Stellar tutorial. You and I have the same mind-set, although your skills are better than mine!

[426-Hemi]

Thank you gentlemen! I try to use whatever I have laying around, to try and use up as much "scrap" plastic as I can (YES, before ANYONE asks, I have a HUGE scrap plastic supply!) My wife does crafts in my shop, repairs all sorts of things but she too uses it and a LOT more then I do, I actually am the one producing the scraps a lot of the time!

BUT I try when ever possible to recycle those left over scraps! (You guys would NEVER believe the plexiglass "stash" I have for making display cases all from my neighbor! What the company he works for considers "cut off and scrap, is a whole 10 shelf display case to me! (YES, they're "that" big!)

Ray,

I'm not " better" we're all equals, I don't know how long you been at building, BUT I've been doing it since I was about 6 I guess and have not EVER stopped, been doing it ever since, and used to build for a living! (still do to an extent) build/design for a few bucks here and there to support my hobby or addiction of plastic, And now, I mold, to trade for things I know I can't just go out and buy.... So I trade my resin castings for different things that interest me.....

But also please remember, I have a fully equipt shop for all this too..... I've got machines the normal modeler would not have! -One of such, may be in my next tutorial!

Edited May 25, 2015 by 426-Hemi

[espo]

Very good info on the fuel pump and looks very convincing. But if this is a small block Chevy engine, as it appears, the mounting point would be on the side of the engine block below the front exhaust port. It is driven off of the cam shaft by way of a "push rod".

[426-Hemi]

Very good info on the fuel pump and looks very convincing. But if this is a small block Chevy engine, as it appears, the mounting point would be on the side of the engine block below the front exhaust port. It is driven off of the cam shaft by way of a "push rod".

David,

If it WERE a Chevy, you would be absolutely correct! BUT this red motor isn't Chevy or even GM for that matter! Its a model of a '68 Mopar "318".... I'm building a car that my Dad once owned that had this very engine in it....

BUT, if this were a Chevy, the fuel pump would be off the corner of the block and stick out just below that end of the exhaust manifold....

The Mopar fuel pump, driven very closely the same as Chevy, BUT is mounted to the side of the timing chain area, run off the crank!

[espo]

John, I went back and reviewed your picture of the engine. My Bad. I was looking at the way that the exhaust ports exited the engine, and assumed it was a Chevrolet. I'm sure you have heard what happens when you assume. Well I looked back at your photo and realized that by the way the exhaust manifolds flow I can see it is something other than a Chevrolet. I hope you didn't take offence. You did show an excellent use of scrapes that would otherwise be tossed.

[426-Hemi]

David,

No offense, at all taken! I myself, did not "list" the engine as to what it is, I was more focusing on the fuel pump detail as they most the time look the same.... I figured when I was making this tutorial, that those out there would be able to add the fuel pump detail where ever the motor would have it for the auto company, their modeling.... Mopar, GM, Ford, etc.....

BUT, with ALL but one model, are "Mopar" of some sort..... -I'm building a '39 Chevy coupe like the one my Dad had in real life, that I got as a heirloom now.... thats the ONLY "Non-Mopar" model I own!

-I limit myself, cuz I know I HAVE too. I have a collective personality.....