The Stovebolt Site Forums The Shop Area Engine Shop 40 olds dual exhaust

Hi, & thanks for having me. I have a 40 Olds convertible & recently found a dual Edmunds intake for this car, now I am on a "unicorn" of a plight to to find a dual/split exhaust as well. I know this is a truck site, but there is knowledge in numbers & I am curious to find out if anyone know anything about the 230 Dodge motors, I have seen Fenton exhausts listed for the dodge which happens to be passenger side intake /exhaust, similar to the trucks. Pontiac, Buick & Chevy are "drivers side intake/ exhaust. I was thinking that possiably the dodge 230 , with a little "help" I might be my only option...I would like to have something aftermarket, not having someone split the original exhaust manifold, but if that's my ONLY option...

Thanks in advance!!!!
Jim

Hy Jimmy2shoes, I'm not exactly sure what info/parts you're looking for. You start by talking about a "40 Olds convertible", then you start asking about parts for a "230 Dodge motors", I'm very confused. Could you clarify what exactly it is you would like to know?

Have you considered having your original exhaust manifold modified for duals? It's a fairly simple job for someone with good machining/welding skills. A slot is milled in the manifold for a blocker plate to separate it into two sections, a hole is drilled in the front section, and a second pipe flange is welded over the hole. The simple way to handle the situation would be to have a muffler shop fabricate a "Y" pipe to put two pipes out the back. The dual exhaust just adds twice as many parts to wear out with little or no gain in power. The exhaust note with duals does change a little, but it's just noise, not more performance you're hearing.
Jerry

Sorry, I gotta disagree with Hotrod Lincoln. A PROPERLY split manifold and dual exhausts will free up some horsepower. This is tricky, because the owner/driver usually drives the car alittle harder/faster, which may make the power/mileage gains SEEM to disappear. The above description of how to split a manifold is somewhat sketchy at best. I started doing them when I was about 16 or 17, and I'm still doing them nearly 60 years later.

'40 Olds convert sounds to cool, show us some pics. Re. the dual exhausts, don't think you'll ever find a vintage dual set up, talk about hens teeth. Two options. Have tube headers made, the hot rod guys do this all the time, or have a REALLY GOOD welder split the stock exhaust manifold. I'm lucky with a local guy that's been welding cast iron and doing split manifolds probably for the last 50 years. You need to check around your area in hopes of finding the guy that really knows his craft to do your split manifold. Also you might run this question past the guys over at www.inliners.org or also H.A.M.B. website.
Best of luck