It is indeed unique to the 3147 Jetfires. Here is the image from the service manual.

It’s certainly not a pressure regulator, As mentioned, I suspect it possibly supresses spikes in fuel pressure, much like an expansion tank in your home water plumbing.

I am certain it is OEM. If you look at figure 8-177 part C on page 544 (section 8-154) in the original 1963 Oldsmobile Service manual, you will see it illustrated.

I’ve never seen anything like that on any mechanical fuel pump. Pressure regulators would be located on the outlet side in the line leading to the carburetor. It might be something that was added by a previous owner at some time during the life of your car. I have seen some goofy add-on devices in the backs of old magazines in the past. This…[Read more]

Nice. What is that 2 2bbls?

How about duals? I bought some linkage rods and ends and made it work with the stock TV linkage

My E-brock 1403 bolts directly to the stock intake manifold. I had to fabricate linkages for the accelerator and transmission TV rods.

I assembled the from A arms today. Used NOS ball joints and the original upper cross shaft and bushings.

I used an Edelbrock aluminum intake manifold with an Edelbrock 1403 ‘performer’ 4 bbl carb. A nice combination. The Edelbrock intake manifolds are still available. Probably the only reason why is because the 215s were used for years on the Landrovers.

Stock manifold. I used an Edelbrock 1403, elec choke, 500cfm. There is a manual choke version.

No adapter plate needed, bolts up.
I did use an insulator under it to isolate it from the intake manifold heat.

Your stock air cleaner won’t fit, it’s for old form 4bbls and too small for the new std size Edelbrock.
Several ways to go but what I did…[Read more]

I contacted Hal at Classic Preservation. We identified what I need and have a kit on order. Thanks for the suggestion!

I do have a question. What is the function of the bulb shaped device that is plumbed into the inlet side of the fuel pump? Is it some sort of fuel surge chamber? I have attached a pic of it.

The fuel pump I have works fine, but is off the car right now, so I figure it’s time for a little preventative maintenance on a 57 year old item. 🙂

Got my powder coated parts back. I hope to start front suspension assembly soon.

I found on a couple pumps that the diaphragm is all that went bad and the diaphragms are the same in many of these pumps. An entire kit is always nice though.

I got a kit from Classic Preservation back in 2007 for my Cutlass. Still working great today. Also rebuilt the one in my ’62 Rambler about the same time and its still working great too, including the vacuum section. Made with materials compatible with fuels containing ethanol. All parts fit perfect. If the Jetfire pump is different from the…[Read more]

I would take two Sandy. I have a couple caps that could use the upgrade.

I take one Sandy, had to make my own before.

Absolutely will. The order was confirmed today; I await with anticipation.