[Healeys] Another backfiring question

[gradea1 at charter.net]

Sounds lean too me. I think lifting the piston with the pin is a bit
nebulous, as you cannot gauge the amount of lift. Using the SU tool
set you insert rods into the pistons and you can then accurately lift
each piston 1/32" which is the thickness of the rod. Another method is
Color Tune in which you can see the richness of the mixture...these
are much more accurate procedures than the lift the piston method.
There could be many other factors, as discussed, but if all runs well
at low rpms, then if properly adjusted, the car should perform
throughout the entire range.
I just had a similar issue with my BJ8 cutting out at about 2500 RPMs,
unloaded...turned out to be the white/black wire mounted to the master
shutoff switch being frayed! Small things make big issues. Hank

	-----------------------------------------From: "Leonard Berkowitz" 
To: "Healeys"
Cc: 
Sent: Thursday January 28 2021 1:37:58PM
Subject: [Healeys] Another backfiring question

  Hi all  
  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?   
  Len Berkowitz
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