How much higher than the temp. of the thermostat should the car run?

The Shape

Founding Member
Jan 11, 2002
2,224
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East ARKANSAS Delta
This is my first summer with my autometer gauge. I am used to the factory carppy gauge that just stayed in the middle no matter what. I have a 180* stat in my car and now that the tempature is in the 90's it runs about 185-188 degrees on the autometer gauge when driving. If I have to idle with the air on a while it will climb to about 195*. I know that is well within the safe zone since the stock thermostat is a 195*. I was just wondering if this was about the average for a 5.0 with stock radiator and stock water pump? Also since I don't have the factory gauge even hooked up anymore at what temp. would you start to worry?
 
You should be fine. I run 185* on my autometer with 180* stat from napa. It does go as high as 193* sometimes, but if I turn off the ac, it drops to 180*. Thats just the way it goes, I have an 3 core copper rad also. Its normal to run higher temps with the ac on. I am in FL where 96* is the norm this time of year.
 
hey guys. i have a stock-ish set up (metal fan, rad, HD clutch, Mr G 180 stat) and aftermarket gauge.
for me, the magic number is about 95* ambient temps. at or under that, i run 190 or less. over that and with a/c on, 195-210 (i shut the a/c off at 210). usually around 200* in normal driving with a/c though.

IIRC, the puter pulls timing at 226, so that is a # to remember, as Ford thinks that is getting a little warm.

what is the deal next to the QR box? i write answers there a lot, and now it is the size of a postage stamp.