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timing wise, with e85 : add timing unless you dont get more power (real power, not "seat feel power") or your EGTs are too high. You should never get knock or det. Remember changing timing affect AFR too ...And i think you are too lean on cruise. I usually set it at 15:1 (i did not change the fuel type setting on my wideband gauge, so it means just a bit leaner than stoeich). I did add timing everywhere, but i increased it less at peak VE than everywhere else. I cant say how much i added as i was using a custom map before, so you cant really compare to a chip tune.
Turbo going that badly on boost is a problem, it usually starts to spool a bit later (like 100rpm later) but it pulls stronger so you get your full boost at the same time, if not sooner.
I think your injectors are maxed though, my 510cc are maxed with a t28r and a 1.8L engine so yours should be too.
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