Speedway Motors 9Super7 - Tri-Power In Under An Hour - Tech

A little measuring, a few bends, and a lot of mock up later, and we've got our first line.

Since I want all three lines to be nice and parallel, it's necessary to make them all the same length. I first bent a 90-degree radius in one end and then I marked the length for the next perpendicular bend to begin.

A few minutes later and I have three lines mocked up. At this point you can see where this is going.

The vertical lines are slightly long, but for a good reason. They will effectively be cut in half so as to flow into the main line with a nice, smooth radius.

To make the opening in the main line, I simply used a die grinder to remove the material after I marked each spot in relation to the vertical lines.

A little work with a file and I had two nice, clean openings.

This photo illustrates what I was explaining earlier about the vertical lines being slightly long. Notice the smooth transition between the main line and the vertical lines.

With everything trimmed to fit, it was time to start tacking the pieces together. Obviously, this would be much easier on the bench, but that would require removing the intake from the motor. Instead, I simply tack each joint with the line installed on the engine...

...and finished welding it on the bench. I made each vertical line as long as possible from the main line so as to reduce the likelihood of anything binding and to allow each line to flex.

Here's the finished line welded up.

And here's the line installed on the engine.