I first tried the colortune after the then "The Autocar" had a positive
test of it in the early 70s.
For a street car with SUs (or Stroms) it is great, because a production
car with SUs has the proper mixture set at idle, and the properly maintained
carb deals with the rest. I have used it to help tune (the carbs are the
last thing to adjust) a few hundred cars. My 1967 tow car would make the
Calif emission testers look on in wonder with the 3 SUs purring away with
very low emissions, and it still purrs at 257,000 miles. You can see a
fraction of a SU "flat" adjustment. Applied physics.
The instructions make it clear that it is not to be used at high
RPM/load. NFI
Hardy
From: sherry robyn <sherryjimmy6116@att.net>
To: fot@autox.team.net
Subject: [Fot] Colortune spark plugs
Is anybody using Colortune spark plugs to any advantage? Jim in Folsom,
CA
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