Quote:
Originally Posted by slowmover
I was going to say that the addition of the ring may have been primarily for sound; aesthetic.
What difference in diameter and blade pitch would be the other questions.
And, how is the "fit" different? The open blade type wants to be "in" the shrouding around half the width the blade or more. Plus a clearance of 1/2" or so from blade end to shroud.
These small differences can add up in cooling efficiency. An oversized radiator -- by comparison -- is needed if airflow is compromised.
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Not sure on the blade pitch difference between the two as I didn't measure it.
Overall diameter seems to be the same but the blade area seems to be slightly smaller with the 3.0L fan than the 3.4L fan...but I didn't measure it before I tried to install it.
Depth into the fan shroud seems to be the same...but again I really didn't measure it.
The radiator is the exact same radiator fer either the 2.7L, 3.0L, or 3.4L T-100 trucks. Only the radiator shroud is slightly different between the 3.0L and 2.7L/3.4L engine sizes. I did not swap out the radiator shroud.
Not sure if my grill block(s) will affect the efficiency of the fan airflow or not. I do have auxiliary temp sensors to monitor under the hood temps and ambient air temps as well as my Ultragauge monitoring my coolant temps.
Changing out my cooling fan...
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