Going down the highway my car usually stays around 170*, but I just took a long trip and it was staying around 190*, the weather has warmed up quite a bit around 100* with humidity. The other day I was sitting in traffic and the guage read 220*, so I turned my heat on and put the car in drive to raise the rpm's (I have a belt driven fan), as I pulled into a parking space it reached 230*. I have an aluminum radiator and 160*, how come all of a sudden my temp. is higher.
I saw in Summit this additive to the radiator that reduces temps up to 20*, anyone ever used it.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"