Yes! try going up by 5!! Also what ignition advance are you running? i run mine at 12deg BTDC no pinking issues im sure you would get away with 10 even with the heat you have over there!!
cheers mate - I'll pop in those 55's then and drop back to the normal pump jets.
timing is 8 degrees at 850 rpm now (right on the mark). I know if I put it more 1/2mm or more then it's ok with just me in the car but with extra bodies it starts pinging.
I know I really need a timing gun with the degrees clock. I would just tend to turn it, test it under load until it pings then drop it back a touch.
But don't you have a 1.5 sud? I would imagine there would be slight differences.
Mate we had 40 degrees in the shade this summer.
Maybe ok in the cold winters but not in the summer.
(you couldn't even touch the paintwork if it was out in the sun)