from stock, how much degrees would it be safe to add to increase performance with 91 octane?
I'm flying solo at the time since I can't see KR, the pid only display some crazy number sometimes, like 125-127 whatever it is, that I don't know what the interpretation of such number will be,
stock timing by SilverFJ RSM, on Flickr
and I've been reading about the relation between MBT spark and spark borderline, so at least I know where the timing ceiling is in a theoretical world.
In the GM approach, i'll zero out the PE/COT spark, and use my Hi Octane table to make spark changes, in the Ford approach, the related tables seem to be the Base Lambda spark and borderline spark optimum power,
What's the general idea for spark tuning in the Coyotes, zero out the base lambda spark, and make adjustments to the Borderline spark OP ? or just add timing in the base lambda spark?
Also as a general idea, where does this engines make the most power with 91 octane safe, 22-24* ? when it's hot, I can see a little dip in my timing table at WOT by 5000rpm, typically goes from 20* to 18*, i'd imagine this is where this engine is making max torque, so i'll probably leave the 5000rpm alone, and add 1 or 2* below 5000rpm, and past 5000rpm ? is 2* safe for 91 octane ?
Thanks a lot.