Originally Posted by mxgregg
I just got tamiya blank 6 whole pistons . What size should I drill the holes and what weight oil for norcal running modified? I'm running blue springs all around.
I can't confirm what you would use exactly with the tamiya pistons because of their different shape and dia, BUT... most of us are running drilling out the 1.1mm 6 hole pistons from HB to 1.2mm holes.
I'm currently running Pro Spec 1500cst, but I have heard a popular set to have on hand is Losi 80, 90 and 100wt oils. Losi oils are SUPER thick in general, so they are estimated to be in the 1000-1500cst range. I have some data on the oils that I measured a while ago on a Rheometer from work... I'll have to look for it.