1950 Willys Truck re-rebuild by 50wllystrk

5 minute(s) of a 620 minute read

CrawlerSaurus, there's a couple of technicalities I want to cover with your build. First I want to bring the carb conversation to a close.

I'm bringing a picture back that we've seen before. In the last conversation having to do with this picture I focused on how the vacuum pull off opened the choke plate slightly to allow enough air to keep the engine running when cold.

Then I mentioned the linkage that I marked with a red marker. This red linkage does not have anything to do with the choke. It actually has to do with the secondaries on the quadrajet.

Using the knowledge that we need to operate the opening of the secondaries by demand of the engine using the vacuum of the engine to define the demand.

I want to keep the explanation as simple as possible. The first point to make is... this carb uses vacuum to operate the secondaries, but it does it in an opposite way that the Holley does.

The picture for reference.

If we have a grasp how the vacuum above the throttle plates, differs from the vacuum under the throttle plates, we can understand the function.

Where the Holley used the vacuum to pull the secondaries open, the quadrajet uses the lack of vacuum to allow the secondaries to open.

The vacuum pull off you see is depressed at normal driving and idle. Since it gets it's vacuum below the throttle plates, when you open the accelerator, there is a drop in vacuum. This drop in vacuum causes the vacuum pull off to extend itself.

It extends itself slowly, this slow release allows the red linkage to move, this movement allows the large butterfly plate covering the opening to the secondaries to open.

There is more to be said about the quadrajet carb, if anyone is interested, let me know. Otherwise, I hope this tutorial on carbs has been helpful.

Once again, I tip my hat to the engineers who figured the idea of using one vacuum canister to perform two jobs.

In the shop I had an issue with a lawn mower, then my heart had an issue, (getting old sucks), nothing major... thank God.

I finally finished the plug wire holders on the 57 Chevy. They turned out better than I hoped.

Very good questions, I know there are alot of pages to this thread, but I want to have you go back to page 41ish. I posted the work done to get the spring over axle change on this truck.

Yes, by using the original springs I was able to center the axle. The scout used a wider leaf spring, but with the grinding and fitting, the perch you make will fit the Willys narrower leaf. I had to set the passenger side leaf close to the front differential. In the pictures I show how I did the grinding and made the perches that I welded to the axle to support the leaf spring. The drivers side was easier, I just had to match the height of the passenger side, and check to be sure it was centered where I needed it to be.

The springs I used is a 10 leaf pack for the truck, I added a leaf to achieve the exact ride height I was looking for.

Ok, now the technical. To get the pinion angle and tipping the axle forward to get the space needed to get the draglink we talked about yesterday to fit with clearance, you lose some of the camber that is desired. Follow the build around page 42 and 45ish, there was a good conversation covering the need for proper camber.

My camber is not textbook perfect, but I have used this truck for 27 years now without any issues. As I mentioned, it rolls at 60 mph very confidently.

Hmmmm.... Missouri to Australia, how cool is this. Good luck.