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Radiator Pressure Cap

21Sep 2017
Keith Plaisted
I have a ZZ454 crate engine in my 57 Chevy pickup. I have a 16 pound cap on it now. It's mixed 50/50. When i'm waiting in traffic the temp runs up to 220 or so. I put a Be Cool Cross Flow Radiator in it w an electric fan. It has an electric water pump on it also. Do i need a different cap, or what do you think?

26Sep 2017
Mr Bowtie
Run a 19lb or 21pound cap. Make sure you get all of the air out of the system. Should run at 180 to 190.

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