How do u tune a motor to run 210-220? Does one change the tuning when the seasons (temps) change from summer to winter because virtually no motor will run the same temp in the winter as it does in the summer.
I live in southern AZ, it's going to be 112f this weekend and it is rountinely well over 100f. That being said, the XJ cooling system is nominal at best in high ambient locations, anything you do to upgrade the cooling system needs to be the biggest baddest parts you can get.
cbenez1 told me that he has tried spacing the back of the hood up one inch (longer bolts and some form of shim) to help evacuate the engine bay of radiant heat. He also mentioned rear facing hood scoops with the belief that it is better to pull heat out of the engine bay rather than force air through it. I too am having problems keeping an XJ cool, I am trying the hood space trick to see if it helps, i'll let you know how it works. That will at least tell me if a hood scoop is worth doing. Good luck Jeff......
I dont think so. XJs will never run cooler then 210-220. Its how our motors are tuned to run.
Mine used to run at 210 or above all the time. I replaced the fan clutch and water pump. Now it runs at 190 all the time (I have a 190 degree thermostat).
Unless I'm sitting in traffic on a 100 degree day with A/C on. Then it'll creep up to 210 or so. Hottest I've had it since the fan clutch and water pump was a hair past 210. It was > 100 degrees that day and I was wheeling it pretty hard and had the A/C on most of the day.
2000 XJ - 3.5'' Lift & Skinny Mudders.
Previous: A CJ, Few TJs and JK.
Removed 2 row, and installed 3 row. Went for a jeep drive. a/c on max, 93* outside, 50 city- 50 freeway it stayed at 195*. Once we got to destination, I left it idle for 10-15min (forget). We then left, it went up to 215* (between 210* and the next line). Drove back home. Came down to 212* (hair line off 210*) and maintained. Thought it might come back to 195* again (but didn't), maybe heat soak kicked in, unknown. But, I am happy. It ran much cooler. I can live with 195-212* in 93* outside a/c set on max. Before it was at 225* mark (line passed 210*).
'97 Cherokee, 99+ intake, 62mm TB, 703 injectors (new), k&n intake, Hypertech III, 180* stat (1/8" drilled hole), 2.5" manifold 2 tail pipe (Hooker Maxflow & hi flow cat), Perf header, 4.5" zone lift, 32" GY Dura Trac, Rear head rests. Comp cam "231" & Perf head (LS1 BIG valves 2.02/1.62). 3 row alum radiator.