Stock fan pulls a LOT of CFM. If you are trying to increase airflow, switching to an E-fan may not help here.
Your fan clutch could be failing. With the engine off, grab the fan and spin it. Does it spin loose, or is it nice and tight and barely spins with resistance?
Spins pretty loosely if I remember correctly and I wanted it to pull more air at idle
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A lot of us have aluminum heads. When I asked my builder (the guy who guarantees the work) told me to be concerned at a constant 240*F and worried above 250*F. With the KB heat machine on mine I might see 220*F with the A/C on at a light on a hot day. I have a Be Cool aluminum rad and a Stewart water pump.
Then your fan clutch is toast.
You could just try replacing it. The OEM fan pulls plenty of CFM.
I just put one of those black magic fans in a BBC 73 Impala I just built. I could use the damn thing to cool my whole office.
Up to you. If you want an E-fan go for it, but you'll have to do an alt upgrade as well if you haven't already.
But sounds like your clutch is freewheeling at idle. Replace the fan clutch and you shouldn't have any issue
But sounds like your clutch is freewheeling at idle. Replace the fan clutch and you shouldn't have any issue
They are pricey, but PPI sells the police rated clutch fan that will outlast your car. You are looking at anywhere from $300-$600 to put an E fan and 3g alternator in the car, depending on used or new and what brand.
@TOOLOW91 - Before the LS seed was ever even planted into my pea brain 3 cars ago, I stumbled across some stock LS1 fans from a TransAM I think. After about 30 seconds of trimming tabs off, I mounted it to my stock 5.0 radiator and it was a perfect fit. Before you spend hundreds on a name brand fan, you might look into this. You can get the fans and a controller for under $200 combined I bet. It worked plenty well for me.
*edit: if you pull up the Hoopty build, it's in there somewhere in the earlier pages before I put the 427 in.
*edit: if you pull up the Hoopty build, it's in there somewhere in the earlier pages before I put the 427 in.
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