Since I replaced my shortblock and valve train it's been doing pretty well, just some minor stutter here and there. Thing has just over 500 miles, and I replaced the downstream o2 sensor last night to see if I could smooth out the inconsistent idle. Since then it's seem a little beet more stumbly when I roll into the throttle. But I haven't driven it a whole lot since I installed it, maybe 10 miles or so. Possibly needs to learn new trims? What do you guys think.
I'm waiting until the 3k mark when the engine is completely broken in to tune, so I'm running stock tune with a GS Uppipe, but pushing it little by little here and there, breaking it in the way I want to drive it but never revving over 4500-5000.