Exhaust pipe


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Yard Art
Yard Art

Posts: 53

Joined: Sat Nov 04, 2017 4:31 pm

Post Fri Nov 10, 2017 9:38 pm

Exhaust pipe

I just noticed that the exhaust pipe from the motor to the muffler is about 3" dia and from the muffler to the tail pie it is about 1 3/4": would this cause an issue?
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Golden Jubilee
Golden Jubilee

Posts: 759

Joined: Thu Nov 29, 2012 6:44 pm

Location: New Salisbury, IN USA

Post Sat Nov 11, 2017 5:10 pm

Re: Exhaust pipe

When the exhaust exits the manifold, it's extremely hot. The front exhaust pipe radiates a lot of that heat, and more is lost in the muffler.

Considering the diameter of tailpipes and intermediate pipes on comparably sized sixes from the same era, the 1-3/4" is probably sufficient. The 3" front pipe will decrease the velocity of the exhaust, and cause it to shed some heat. The smaller tailpipe will likely increase exhaust velocity a tad, but not cause backpressure problems.

These engines turn about 3600-3800 rpm maximum...not exactly a race engine by any means.
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Yard Art
Yard Art

Posts: 53

Joined: Sat Nov 04, 2017 4:31 pm

Post Sun Nov 12, 2017 9:27 am

Re: Exhaust pipe

Thanks for the information much appreciated.

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