454 getting hot idling

[black dawg]

This is swapped into my 91 burb.
Basically wont overheat under any conditions except idling with a/c on. 90+ degree weather, and after 10-15 minutes coolant temp will get over 230.

Everything is in good shape, good shroud and good fan clutch. clean big radiator.
Is this fairly normal for a big block? I have considered adding an electric fan, but we normally dont get weather like this, and I dont usually let it idle that long.

 

[454Sub]

Big blocks run hotter than small blocks because of the obvious size difference in the engine bay. Most 87 up factory BB trucks came with a small electric fan that kicked on when the AC is on, or when temp hits a certain degree.

I would get a good fan and wire it to come on when the AC compressor kicks on, and add a temp sender switch to kick it on automatically when it hits a certain to your liking temp. Summit sells the switches for like 20$. Great peace of mind and you never know, 10min isnt a very long time, and everyone has left their truck idling in the driveway for a 2 second walk in/out of their house and walked in on the dog dragging the trash out of the can.