[Buckeye]

Might want to ask over on XS about R13, just about every 2 stager I have seen built there uses R1150 for the second stage.

Airgas should have it, tho you might have to order it.

I am not sure of Sdumpers builds and just what his can hold temp wise and the fact I have not used a Gulftown yet so I do not know what heat loads they put out but asking for -100c fully loaded on a 2 stager might be a bit much to ask from what I read.

On a fully loaded I7 mine will sit about -106c on idle, but drop down to ~-85c on full wPrime loads.

In order for 2 stagers to work really well they need the strongest 1st stange you can make, thats the key for handling loads, at least as far as I know.

Like I said SDumper has been making 2 stagers right and left these days, based on my unit and his tweaks and he gets a bit better load handling than my 3 year old unit.