Hi Jez,
I've been running one of your Stage 1a chips in my car for the last 6 years or so. (running 1.1 bar to err on the side of caution with E5 petrol) That was grand when E5 here in Ireland was rated at 99 RON. But over the last year or so, none of the petrol companies will commit to such a rating anymore, and now only commit to "meets 95 RON standards". 98 RON "super" has been gone from Southern Ireland for over 10 years now also...
So any advice where that leaves me running such p1ss water petrol to keep things safe? I've been thinking of investing in a knock sensor to know for sure what is going on. Cheers for any advice.