Well, that would be pointless, as 0.1% conc of anything won't make any noticeable change to ocatane rating. Add some toluene or race gas in part mix. 2.1bar is way too much for SUL petrol, on any engine.22B said:those figures quoted are at 2.1 bar.
This is running 97 ron super, not race fuel, with NF octane boost in a concentration of 1ml per litre.
As for retard of ignition, this losses so much power, surely it would be worthwhile to cure the det problem at it's soucre rather than bothe with this?
BTW, this is not, in any way a flame towards you, just some constructive, and hopefully helpful criticism.