Mock up of the dump tubes, that is where the exhaust will permanently exit, can’t wait to get the the system done. Got lots of other stuff on the list to do first. Sent from my iPhone using The H.A.M.B. mobile app
That's the way did it in 1958. Love the car. I guess I'm a little older than most guys on here so my idea of the first contemporary performance cars were the early '50's Oldsmobiles, not the Tri-Five Chevys.
When I was growing up they were called “cutouts” dump tubes were under the car about 1-2” behind the rear end on each side of the differential on a jacked up rear. Most had flared ends and looked good on 59-60 Chevs. Some called them scavengers....
Yes, in 1950, Chevy only had the Stovebolt 6 with 90 HP. The Olds Rocket OHV V8 with 135 HP was 1/3 more powerful!
To do Cutout's correctly the pipe needs to be joined at a bologna slice as close to the manifold or collector as possible so you actually get Exhaust out the end. If you do a 90 degree joint you get a Crap sound much like a Hole in the head pipe. I run mine open a lot.
I got exhaust cut outs like that for my Plymouth ages ago but can't remember if I ever put them on. Too many modifications over the years to remember them all.
Yes back in the early 60's we used gas tank spouts with gas caps. It was all we could afford as 16 year old kids.
We used to make them out of steel plumber's pipe threaded with a cap. They worked great but I had to remember to keep a pair of gloves in the car to remove them. Even with the gloves I would almost burn my hands. But the cool sound was worth it.
Looks just like they should to me. @jimmy six we called them cutouts as well. My math teacher taught me that 135 horsepower was 50% greater than 90 horsepower., not 33%.
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