I have a 1990 4x4 sapphire. I bought the car nearly 2 years ago, it is running on a stage 1 which to my mind is a chip, increased boost, s/s exhaust and a dump valve. Correct me if I'm wrong.

Unfortunately the best petrol I can get here in Ireland is only 95ron and therefore not really good enough for my car as it is. I have used octane booster and so on and I'm not really looking to turn this into a 'for' and 'against' debate on octane booster.

I would like to know if my ECU can be put back to standard and also remapped to run on 95ron. I understand that it will reduce the cars power potential but I'd prefer a situation where I won't bore a hole in my pistons by using too low an octane rating and consequently having lots of pre-detonation.

I believe there is more to driving a nice sapphy than driving the balls out of it to impress v-tecs and evos!

I plan to turn back the boost to standard (0.7-0.8 I believe) and remap the ECU. The other mods I assume are ok to leave where they are?

I don't think I'd trust any tuner here to do this job so I hope there is help on hand in the UK?