Well, i'm now making my own chips.
I'm trying to run 1.2 bar on 98 ron gas with NO WI.
I?ve got knock a few times, but the knock sensor did it job and retarded ignition. I could feel knock in 4 and 5 gear (it is not a gear related problem but how long you stay at a certain rpm range).
Knock could be seen on wideband log as a ondulated afr. This happens because, in my car, when ecu senses knock it retards timing in 3 degres. Than will star incresing in 1 step degree until it reaches mapped value (on chip) OR knock occurs again.
So, on AFR, a decrease in timing will rich up afr, as timing is gradually advance, afr will lean, and so you see the ondulated afr curve.
I've also have a knocklink but in my car if it lights up (even the first light) i'm already in heavy knock!
Back to water injection.. I?ve managed to run 1.2 bar with 98 ron gas @ 11.5(4500rpm) to 12(6200rpm) AFR but had to drastically decrease ignition timing, from 21 @ 1 bar to 15.7 at 1.2 bar.
Now i?m going to put WI and then will see how it goes.
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