BEAMS engine remap for 95 octane, Can it be done? Options

[Dagon]

Hey everyone,

I'm new to the forums. I've done a few searches for info on Beams remaps but have found nothing.

Just about to sell my 94 Red SSI Celica with the 3SFE lump, to get a lovely white SSIII Beams machine!!

My only problem is that over here in Ireland it's hard to get anything other than 95 octane fuel. The Beams really should run on 99RON. I've checked out the option of octane boosters like redex, and they seem cool, but would be expensive in the long run, and their effectiveness is questionable.

So the only other option for me is to remap the engine for 95 octane. However, I know that it's a high compression engine, and am not sure if this is a good idea. Obviously performance will also suffer but I'm not sure by how much.

I'm sure some of the Beams heads on this site will be able to help me with this. Thanks in advance for any help or advice from you fellow Celica nuts

[Dagon]

Your ECU should detect the 95 octane and pull back timing to compensate for it. You should be fine.

Afraid not. I've checked this out, and it is not a good idea, and ultimately leads to serious wear and tear on engine components (with knocking and pinging), leading to total engine failure in the long term. These engines are very high compression, and long term 95 RON use is not recommended.

As for fuel ratings - in ireland, it is RON I think. Most pumps are 95, but some are 97 and 98 (e.g. Shell Ultimate fuel). However, by and large it's more expensive and harder to find 99 RON unless you live in a large city.

So does anyone know if it's possible to remap the Beams for lower octane/RON fuel?