[audiofetish]

Aluminum radiators do not help that much on H1s. There have been lots of discussions on this at humvee.net. Did you modify your existing shroud at all? I would not suggest any kind of a shroud that would limit air flow. Most electric fans that H1 owners do add have no shroud and do not restrict airflow when not in use. Personally, I would ditch the add on fans. As ssgharkness suggested check the t-stats. Make sure to get nice ones. Do not get cheap $3.00 ones from Napa. Those crap out like no other. AC Delco is the way to go. Have you checked your fan clutch? Those also fail quite a bit. When the motor is up around 230 or so, turn off the motor and see if you can turn the fan by hand. If you can it is bad. Lastly, are you going by the temp gauge on the dash or by a scan gauge or something similar? The gauges on the dash are almost always wrong. Mine latest H1 is off by about 10 to 15. Hope this helps...