98RON & older engines

[dom14]

Hey Dom,

I've been running 98 in my GQ rb30 wagon almost exclusively for the past 2 years or so, pretty much unless I cant get it and have to go for standard. (I try and chuck a bottle of octane booster in if possible when that happens). My family mechanic recommended I run it instead of standard.

Plugs are a great colour and condition, engine runs well, particularly since the rebuilt carby went on! Engine sometimes pings ever so slightly on standard but not on 98. (It did once briefly ping on 98 with the aircon on a hot day under hard acceleration, hasn't happened again though so I figure a bad batch of fuel that day)? I could probably advance the timing a bit more on 98 but prefer to be able to use standard 91 if I have to. Talking about the old nikki carb, getting a professionally recoed unit has to be one of the best things I've done to the old girl!

Thanx mate.
I remember you wrote before about the improvement you got from rebuilding the carby.
I, on the other hand, have been as adamant as ever and been "fiddling" on my own and when the carby's gone over it's lifespan, I would consider buying a new one or EFI conversion.
I just got an AFR gauge kit to help me with tuning carby & ignition better.
I should've been using 98RON whenever I drive it on petrol, being a dual fuel vehicle.
Cheers