Its been a while sense I've posted here so I thought I'd throw these pics up.
I'll preface this by saying I'm running a 3.2 Rebillo motor on 110 with ITB's and an Adaptronic ECU. 5 speed 240sx trans with a 5.5" clutch and a flex plate. 4.11 final drive with some Hoosier R7's
I was having an issue pushing water out of the radiator during race like conditions. Only happened after several laps at full tilt. Not sure if I'm getting exhaust gas pushing by the head gasket or what. I did a test on the coolant to see if gas was present and it was negative but I'm not sure how accurate those auto zone test kits are. The other strange thing is the system wouldn't suck the water back in from the catch can after it cooled down.
So… we decided to look into a recirculating system. We took a trip to the junkyard and scored this tank. I made some brackets for it and mounted it. I have an inline filler on the upper radiator hose that has a overflow outlet, I connected the inlet on the tank to the outlet on the filler neck and installed a 0 PSI radiator cap there. I have a 15 PSI cap on the recirculating tank. The outlet on the tank goes where the heater return line would normally go. I ran this setup at VIR full a couple weekends ago. Everything seems to work great, it built pressure as it should and cleared air out of the system.