What gap for tr55????
What gap for tr55???? I needed to know what should I gap my tr55 spark plugs too, I have an 02 z28 A4 with long tubes, ory, cat-back , lid and p&p throttle body with mass... What was the best gap that worked for you???? Thanks
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For a N/A engine:
You'll have no difference in performance anywhere from .040 - .060.
So use .050....right in the middle of the working range. I've tried all different gaps, nothing at all changes in the least. I tried them all when 100% stock and with my 427ci stroker......same performance.
.
You'll have no difference in performance anywhere from .040 - .060.
So use .050....right in the middle of the working range. I've tried all different gaps, nothing at all changes in the least. I tried them all when 100% stock and with my 427ci stroker......same performance.
.
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My manual says .06 but you're good with whatever they're pre-gapped at. I posted this elsewhere, but would worn out plugs cause problems with more advanced timing during tuning? Such as outright refusal to go past a certain RPM at WOT? My car is 100k miles and don't think the plugs ever been changed 
