I would have said 1.5bar on an SR20DET but I would say there wouldnt be alot of gains going over 1.2bar on an RB25DET, especially if the internals are still stock!!
Nice going there man. It takes quite a bit of practice to get the most outta your car on the 1/4 with a manual car.. My 60fts are always 2.4 so I need more practice..
Make sure you get a 12 next time you head out
Peak readings about 60 indicate that your engine is lightly pinging. >100, you have some issues, so turn down the boost a bit or retard the timing by a degree or so.
Actually yeah light pinging can actually produce more power because the cylinder pressures are even higher than normal combustion conditions, so thus you get more torque. Heavy pinging usually doesnt produce lots more power however because the pressures are so uncontrolled. But yes obviously in both conditions its detrimental to your engine..
That castrol 10W60 stuff is too bloody thick. That belongs in race cars, or smoke blowing Sigmas.
Motul 8100, Mobil 0W40, Castrol 0W40 or Shell Helix Ultra 5W40 would be a good choice for all year round use.