I added a 16" electric fan (pusher) to the front of my rad. I then removed the fan (making sure to reinforce the pulley). then installed an inline thermo switch on the bottom tube. With an IR gun I waited for the thermo housing to reach 182 degrees (three degrees over my brand new 179 T-Stat), at which point the electric fan kicks on. It will cycle on and off.
The electric fan kicks on and cools down in standing traffic. However, when under load (driving at 45-50) the thermo housing will reach up to 200~205 and the fan stays running until I idle for 5-10 minutes.
My gauge never went into the red with my fan unless I was maintaining highway speeds for a VERY long time.
I know that our gauges are notorious for reading bad...and I know that I can hookup an aftermarket gauge and get a better reading. But the IR gun is saying 200+ degrees when I pull over, jump out and take a reading.
I also I know that I can bolt back on the fan and eliminate the electric fan...and go back to factory specs. This can eliminate the bad rad theory and make sure that the system is running right. But it was running right before the electric fan...so, it should still be running right after the 45 minute job is done.
My thought would be that just running at normal road conditions would keep the ram air rad cool enough with out any help from the fan...even in 95 degree summer weather.
The rad is holding pressure, the cap is good, and I ran some rad flush through the system...No black/brown crap or anything like that in the system.
So, the questions are:
Are electric fans unstable like this on our 2.25? Is this sounding normal to those that have done it?
I have also thought about running the factory fan in conjunction with the electric fan for those extreme cases. Is this overkill?
Here is another thought...I am getting some pretty good chain slap when running at high RPMs. I know that the tensioner needs to be adjusted/rehauled...but would this mess up the temp that much!?
The electric fan kicks on and cools down in standing traffic. However, when under load (driving at 45-50) the thermo housing will reach up to 200~205 and the fan stays running until I idle for 5-10 minutes.
My gauge never went into the red with my fan unless I was maintaining highway speeds for a VERY long time.
I know that our gauges are notorious for reading bad...and I know that I can hookup an aftermarket gauge and get a better reading. But the IR gun is saying 200+ degrees when I pull over, jump out and take a reading.
I also I know that I can bolt back on the fan and eliminate the electric fan...and go back to factory specs. This can eliminate the bad rad theory and make sure that the system is running right. But it was running right before the electric fan...so, it should still be running right after the 45 minute job is done.
My thought would be that just running at normal road conditions would keep the ram air rad cool enough with out any help from the fan...even in 95 degree summer weather.
The rad is holding pressure, the cap is good, and I ran some rad flush through the system...No black/brown crap or anything like that in the system.
So, the questions are:
Are electric fans unstable like this on our 2.25? Is this sounding normal to those that have done it?
I have also thought about running the factory fan in conjunction with the electric fan for those extreme cases. Is this overkill?
Here is another thought...I am getting some pretty good chain slap when running at high RPMs. I know that the tensioner needs to be adjusted/rehauled...but would this mess up the temp that much!?
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