1950 Willys Truck re-rebuild by 50wllystrk

4 minute(s) of a 620 minute read

Wow, 9 months is right, time does fly. Sitting back in my chair, rubbing my chin, hmmmmm. we've covered alot of stuff too.

Still working on the 57 Chevy truck, I've made some progress.

One item that my dad wanted on this truck is what's called "exhaust cut outs". Personally, I never considered them, but I believe they were a big thing many years ago.

Exhaust cut outs are a "y" shaped pipe addition that is between the engine and mufflers. One of the outlets on the "y" goes to the muffler, the other outlet has a flange welded to it. There would be a cap bolted to the flange. Once you get to the race track, unbolt the cap and you have an open exhaust system.

I've decided to follow through on his idea and add 2 exhaust cut outs. Of course, I have to complicate the system and add a few things to enhance the finished project.

First, there are three choices of how to open the cut out. First is as I mentioned, unbolt the cap and remove it. Second, they make a cable operated valve inside a "y". Third, an electric motor unit that operates a valve assembly that bolts to the flange on the "y" pipe.

I'm planning on making my own "y" pipe, and using the electric motor valve.

Next, I will have four out lets all together. Two will be the tail pipes after the mufflers. Two will be for the straight pipes that will exit just in front of the rear wheels.

Now for personal preference.... I'm not too big on having two tailpipes pointing in different directions, say..... like the exhaust outlets just infront of the rear wheels.

Here, let me explain.... If I have an 8 cylinder, I basically have two, 4 cylinder exhaust systems. If they both exit near each other, the vehicle sounds like an 8 cylinder, the pulses mix together.

With the two tailpipes exiting on opposite sides of the vehicle, I don't get the blend of all 8 cylinders, it sounds like two 4 cylinders. The pulses don't mix together.

This is the reason for the extra work I'm doing, I will build an "x" pipe to blend the two banks of cylinders together. Hopefully now when I open the exhaust cut outs to open pipes, I will have the sound of all 8 cylinders coming out both sides of the truck.

Now for a picture of what's going on. I myself do not have an exhaust pipe bender. I basically form an idea and have a local shop bend some pipe. Then I get to cutting, grinding, and welding.

If I was doing a simple dual exhaust sytem, this would be a breeze. Ha, I just can't keep it simple.

With this next picture the system is coming together. I have all 8 cylinders mixing in the "x". I have a little finalizing to do on these pipes, but I have the fit I'm looking for.

After this point I have to figure for the "y" pipe that will send the exhaust to the sides. After the "y" I just have to install mufflers and tailpipes to the rear bumper area.