Originally Posted by distantpulse

No I didn't get a new tune. Just the spacers and 1 step colder plugs gapped to .035. I don't think it was all heat soak related because before, in fairly similar weather, I have came in off the street (Heat soaked) and ran it and went 12.28@111 and stayed fairly close to that number give or take 5 hundreths. So im missing a bunch. I could also feel the car just not pulling on the upper RPM range like it use to. I am going to go back to .040 gap and see if it helps any. If that doesn't do it, im taking the spacers off. If that doesn't do it, im going back to the stock plugs and gaps? lol. At least I didn't change a bunch of things at once, so I can isolate the problem fairly easily. Not worried yet!