Even when I was running my Z with the stock radiator I never had this issue. If I was you I'd be checking for a bad hose connection,etc. Also make sure you refill your system as this looks like it might be enough to actually cause you to be low on coolant.
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'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock
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