Re: 23rd series Eight Tail Pipe Diameter

Posted by HH56 On 2007/7/2 9:12:13

You're correct, that is exhaust pipe from eng to muffler. What gets more curioser is that the specs from 21st series data book are same as 22-23rd mentioned from SC but my 47 2106 (conveniently disassembled) instead of the 2 1/2 spec'd has a 2 1/4 pipe and the 1 3/4 in tailpipe as 47 clipper noted for his.

Maybe they decided large wasn't necessary or because of shortages, used what was available. Since my car wasn't when running nor 47 clippers is now having overheating issues, maybe tailpipe is not the answer on your smaller engine either.

Does the vacuum number indicate any kind of restriction? A friend had overheat issues on his 51 that turned out to be the manifold valve opening but sticking just partially open somehow. Said it took forever to find but he was also burning valves and on the 3rd grind, the mechanic took manifold apart and found true problem.