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Antifreeze Density vs Temp

Anyone know where I can get data on SG of antifreeze solution vs temperature?

Trying to calculate what volume of header tank I need in the Z but a bit difficult without that data!

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    I presume you are talking about specific gravity john, something equating to John Smiths might hit the mark ;)

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    Lol, was talking about specific gravity, John Smiths :hurl: Jack D. everytime for me!

    Found some data for pure Ethylene Glycol eventually so just sort of guessed at where the mix would be. Looks like I only need about 800cc air space above the liquid when cold with a 1.2bar cap so a small tank will do.

    Just as well really as there isn't space for a big one!

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