<div style="color:black;font: 12pt Comic Sans MS, sans-serif;">One more possibility on this subject. It is possible that if Len's BJ7 has points ignition & the points are "floating" at this speed/RPM it might sound like backfiring thru the carbs? Also, Len did not mention if this is occurring with the O.D. engaged or not. Also, Len did not state what octane grade of fuel he is using.
<div>One more comment: In my experience, the owner rarely mentions any non-original modifications/"improvements" they have made to the car. Such as: air cleaners, PCV systems, compression ratio, cam, jets, needles, springs, the list goes on & on. </div>
<div>We need to know about anything that is not O.E. including the specifications.</div>
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<div>I do not think it is related to today's fuel vs. the fuel available when the cars were tested by the factory. If that were the case then many more of us would be experiencing the same issue. <br>
Gary Hodson
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From: Leonard Berkowitz <a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:DrBerkowitz@hotmail.com" target="_blank" href="mailto:DrBerkowitz@hotmail.com"><DrBerkowitz@hotmail.com></a><br clear="none">
Subject: [Healeys] Another backfiring question<br clear="none">
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Hi all</div>
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Just finished repairing and reinstalling the
carburetors on my BJ7. I thought I had
everything adjusted properly. According to my
Haynes Manuel the engine speed should increase
slightly when you lift the piston a very small
amount. Mine does that. My dwell angle is where
it needs to be and the car starts and idles
nicely. Also sounds beautiful when I punch the
accelerator linkages. The problem is that when I
get it up to 60-70 mph I get what sounds like
backfiring into my carburetors. Also sounds like
it doesn’t have a whole lot left in the tank, so
to speak. Does that sound like I am running too
rich or too lean? </div>
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Len Berkowitz </div>
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