[pfilean]

Cooling the Pontiac seems to be a popular subject. I have always feels my 61 ran hot. The PO said he had some problems. He had put in a 4 row radiator and a flex fan to replace the factory 4 blade. Even a 195 thermostat which I can't understand. My 61 has green and red temp lights. Green out at 140 then red on at 240. So factory thought 240 was a temp to worry about. But I'm old school and like around 180.

Originally on real hot days I could get vapor lock but solved that with a GF98 vapor return fuel filter. Then over the years I changed to a 180 thermostat, added a factory fan shroud and seven blade declutching fan. Used a Hayden 2747 and have done the repositioning trick with the thermo spring. Still on a 90 degree day 195 to 210 depending on road situation. More in traffic.

So I have been close to hitting "add to cart" for a Cold Case radiator but decided to try a high flow thermostat first. I got a EMP Strewart (by RobertShaw) 180. Now on a 90 degree I see around 190 ( 195 at a light) depending on road conditions. May see higher in worse traffic but have not seen 200 yet.

I know there are differing theories on high flow or the need for the little bleed holes that this thermostat has . But without starting long discussions this was my experience. Somewhere around a 10 degree drop is what it is even if more would make me happier.