I don't an engineering degree can answer that one. You will know soon after you install the repaired heads, though. ;-)

Chris.

Wysłane z iPhone'a

Dnia May 20, 2011 o godz. 15:20 Mike Miller <mwmiller@CWNET.COM> napisał(a):

> Fellow suffers,
> 
> I had some little breaks in my headers. Well actually #1 was broken in two
> and #2 had a crack. And while they were being welded the guy found that the
> test port was leaking as the plug had fallen out.
> 
> All has been welded up now. But my question is how much would that open test
> port have affected my gas mileage? Any thoughts?
> 
> Mike in Marin