Quote:
Originally Posted by jerry grayson
What is the story on the two exhaust pipes per side on #12? How does that work?
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Jack's hot rod was voted the second best appearing roadster at El Mirage in 1947 so I’m guessing the main reason for the two pipes was probably more for show than anything else, Jack had to always do something a little different.
I did ask Jack about how that pipe setup worked. His theory was that the top pipe went to the center outlet which carried the exhaust from the two cylinders which share that center port. The bottom pipe was connected to the front and back ports so it was also carrying the exhaust from two cylinders. This was Jack's version of a tuned exhaust system. On the street he stuffed "Chore Girl" brand scrubbing pads (kind of like steel wool) into the pipes to quiet them down. He said they would stay in there until He got on it hard, then it would blow them right out.
Here are some other photos of the engine so you can see how the pipes attached.
Jerry