Quote:
Originally Posted by jumpsoffrock
Yes I have a Hayden 2747 HD fan clutch.
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2747 is an excellent heavy duty fan clutch for most circumstances. In your case, though, you *might* benefit from a severe-duty unit.
Differences are explained here:
https://www.haydenauto.com/en/produc...-types/thermal
I am curious about your 5-blade 20.5" Riviera fan. Small-block trucks use an 18" fan. Mine is 7-blade and works well. I was thinking big-block trucks use a 19.5" fan.
At any rate, since you have a 7-blade, if it fits your shroud, maybe it's worth trying that before considering a severe-duty fan clutch.