Re: Exhaust Manifold Questions

Posted by PackardV8 On 2009/5/7 19:37:44

The tube thru the exhaust manifold should be Stainless Steel.
What is the diameter of the tube that goes thru the exh manifold???? maybe use a tube from some other application.

THE TUBE needs to be STAINLESS STEEL to keep it from burning out. Most other manufacturers use a cheap grade of SS and the tube is usually interrupted about centre of the tube to create a kind of venturi and to allow more heat exposure to the air and to keep the tube from bending or collapsing when driven into place.

What i have described above is exactly what SBC used for many years with great success. Look at a choke tube for Chev V8 1957 thru at least 1965. If i remeber rite the chevy tube is 5/16' diameter.

Thread the old tube with a tap and use a slide hammer to remove the old tube. Drilling out is ok but becareful tha the drill does not grab or wollow off to the side.

It would be much safer to pull it out with a slide hammer if u can get one in there.