451 overheating, even when moving
I use (and have used) a few Derale fans both fixed and clutch style. I go by what their instructions recommend for clearance. And it applies to any blade (flex fans excluded: wouldn’t use one if you paid me) made by anyone else. But, when you don’t have the room to put the blade at the ideal distance away from the radiator/shroud for whatever reason, you have to make sure everything else is up to snuff. No loose radiator or shroud mounts, clapped out motor/trans mounts, no fan blade with curled outwards blades, especially when needing to run it closer.
You have the room towards the engine. I’d find a spacer about 1/2” shorter if you in fact have 3/4” from blades and mounting bolts to the radiator.
I run a Hayden short clutch with a MP asymmetrical 5-blade. The clutch center fins are right at 1/2” away from the radiator, the blades are 1” away. My **** is tight. No issues with body flex or engine and trans moving forward. You got sloppy **** then best allow for that extra room as mentioned.
I use (and have used) a few Derale fans both fixed and clutch style. I go by what their instructions recommend for clearance. And it applies to any blade (flex fans excluded: wouldn’t use one if you paid me) made by anyone else. But, when you don’t have the room to put the blade at the ideal distance away from the radiator/shroud for whatever reason, you have to make sure everything else is up to snuff. No loose radiator or shroud mounts, clapped out motor/trans mounts, no fan blade with curled outwards blades, especially when needing to run it closer.
You have the room towards the engine. I’d find a spacer about 1/2” shorter if you in fact have 3/4” from blades and mounting bolts to the radiator.
I run a Hayden short clutch with a MP asymmetrical 5-blade. The clutch center fins are right at 1/2” away from the radiator, the blades are 1” away. My **** is tight. No issues with body flex or engine and trans moving forward. You got sloppy **** then best allow for that extra room as mentioned.