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JerseyJim · 09-23-2011, 09:42 AM

Thanks for the responses. Considering that Ford used a 1.75" exhaust system just a decade later on smaller displacement engines... Just speculating that a reduction in exhaust back pressure might be helpful. We all know that flatheads have a tendency to run hot. Some are better than others. Some are worse. I can drive mine without too many problems as long as I don't have to stop and start too much in hot weather. But who can predict when you may get caught in traffic. Any incremental improvement to me seems worth considering.

09-23-2011, 09:42 AM	#7
JerseyJim Member Join Date: Jan 2011 Location: Central Jersey Posts: 71	Re: 40 Ford Stock Exhaust Size??? Thanks for the responses. Considering that Ford used a 1.75" exhaust system just a decade later on smaller displacement engines... Just speculating that a reduction in exhaust back pressure might be helpful. We all know that flatheads have a tendency to run hot. Some are better than others. Some are worse. I can drive mine without too many problems as long as I don't have to stop and start too much in hot weather. But who can predict when you may get caught in traffic. Any incremental improvement to me seems worth considering.