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Does tuneing your ltft's to 0 to -8 or so give a performance increase? Reason why I am asking: I tuned mine to give:
max of -10 at idle
max of -8 at down shift
-1 to -6 at part throttle
and I swear the car runs better WOT, btw, mild mods, air lid, cat back, free mods
there is only one real reason to get you ltft's slightly negative: the PCM does not add extra fuel during WOT. ie. you get consistent WOT fueling
Is there any way to block this like the lt1s?
If you mean defeat the addition of fuel at WOT, due
to negative LTFTs, there are probably ways (like make
the closed loop enable temperature insanely high, and
run full time in the open loop table and/or PE). But the
WOT extra-enrichment from LTFTs is only a "safety
feature" that's triggered by some low-end mistuning,
and proper tuning will make it a non-issue.
there seems to be a min and max temp that LTFT learn is enabled between (haven't tested it). Not sure how useful it would be cos permanently disabling LTFT learn is probably not a good thing.