What is the main cause of exhaust backfire? I can't believe how rich
I have to adjust my SU's to get rid of it. Adjusting the carbs via the
book methods and it just pops back like the blazes. I am running the
timing at 15 degrees advanced (static method) with no pinging. Running
like this, my plugs and exhaust pipe are loading up with carbon
deposits. It seems like I can not get this engine (71 B) to smooth out.
I am running with all the standard smog stuff, i.e. gulp valve, air
pump, etc. but I tried without it, blocking all the inlets and seemed to
make no difference.
Also in a different vein, what is everyone running for plugs (Champion,
AC, etc)?
Wally / Templeton, MA
71 MGB
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