Join Date: May 2007
Location: Baltimore Maryland
Re: radiator or water pump
Rob, what temp is your fan switch set to turn on the fan? Definately switch to the 180* thermostat. I know what you are thinking. I run a 160* now and it runs hot, what's going to happen if I up it to a 180*? Once you get all the other factors in order, the 180* is going to allow your engine to get to a more consistant temp and also allow it to burn off the condensation that builds up in the oil(condensation is unavoidable). Install the 180*, the fan turn on isn't as important as when it's set to turn off. You have to make sure the switch turns the fan off at a temp that is hotter than the thermostat lets the cool down to. For example, I had the 180* stat, but my first fan switch was on at 185* and off at 170*. Once my fan came on, it NEVER shut off because the stat couldn't get the coolant temp down to 170*. Once I switched to the 200*-on and 185*-off, everything was perfect. The car can idle in 100* weather in my driveway or traffic or run at 4000-4500rpm on the highway and the car NEVER goes above the fan turn on temp. As far as the radiator, if you are going to replace it, buy the WIDEST unit you can possibly fit. I had to open up my core support, but it was worth it. I got a big block unit installed and I don't have any problems. The thick rad's look nice, but by the time the air has traveled through all the cores, it's heated up again. Also, I was told that the tranny cooler is another "HOT" spot. If you have the ability, use an external tranny cooler and DO NOT mount it in front of the radiator. Mount it off to the side and use a fan to cool it. The heat from the tranny fluid heats up the air moving across the rad and heats up the coolant. Now, I didn't do that part and I haven't experienced any issues so you may get lucky with that part like I did. I just use the internal tranny cooler in the rad, but if you plan on using both the internal and an external, then you may run into problems. The extra heat from the external unit may be too much and cause you to run hot. Keep us posted. I really want to know how things work out.
Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4.10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics)