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Originally Posted by Dean
That sounds high for a low torque cruising. In the head of summer, mine runs low 14s. Same location I beleive (Your old headers) I wouldn't think the 2.5l should be hotter than the 2.0l
Should be closed loop, so maybe you are a bit lean?
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Your car's sensor is in cyl #3 (the one that tends to run lean). Since I've got fuel rails, I don't believe I have a particular cylinder that's prone to running lean. Also, I'm running jet-coated headers, so they might be holding a bit more heat... but I'm not really sure about how much difference that makes.
You're right about being in close-loop. Car could be running lean, but that's probably not a big problem since it's low load... though that might explain the odd hesitation I've noticed around 4k rpm under partial throttle... I wonder if I've got a little knock correction going on? (I still owe MikeW a data log of the hesitation, but I didn't want to try to do it in the freezing rain on Sunday.) At WOT, my egt's actually decrease, IIRC.