Kinda of a stupid ? (Vortech aftercooler capacity)

One of the coolant hoses came of and I was just wondering how much coolant the aftercooler tank and rad hold? Where it's located I can't really see it. And is 70/30 water/coolant a good mix for it? Thanks!

Dip the reservoir tank, make sure the coolant level is somewhere near the bottom of the filler neck, that will allow for some expansion. I use a 50/50 mixture so it won't freeze in the winter and so the pump gets good lubricity. 3 years on it now, no problems ... :)

Hope this helps

LWM