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What would be an acceptable water temp for a moderately built 396 (500 hp). Mine has been runnig at 230 degrees and that seemed like it was a little too hot.
 

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230 is too hot, anything over 200 would concern me.....I believe optimal operating temperature would be between 180-190.....KZ

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John D. Smith
69' SS/396 CLONE!
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My 396 has the sensor in the cylinder head. It reads about 10F high (checked by pyrometer). I run about 200-210 in the head, but the water temp at the intake manifold outlet runs 180-190. If I run it hard, it runs to about 220 by gauge, but the intake temp stays about 190.
Takes a long time to come back down to 200, too.

joe

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69 396 w/SS Trim
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the 454 in my 70 had the idiot light just starting to glow ,so I threw in a set of gauges and it run 190 pretty much in the time and thats with out a shroud,the idiot light is in the head and the temp gauge is in the intake. I have a shroud coming anyways

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