Many aftermarket Standard Electric Fans ~2300 CFM and w/o a flaring. Some High Performance units ~3000 CFM w/o flare. Most OEM are = to or less aftermarket Standard, w/ and w/o flaring.
I don't have math handy...
Fan CFM vs. car MPH is mostly useless
Running fan(s) or not depends on many things... a few ones: Fiero Trim level, IE which nose. Fiero uses body parts to duct air flow, that many owners has missing pieces. Car has A/C or not A/C on/off A/C and/or radiator is clean Cooling system and coolant is good
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
Pretty much and decent momentum (where you feel a considerable breeze when you stick your hand out the window).
You do not want to overcool the coolant in the radiator. It should only remain slightly cooler than the engine. If it's too cold, it will shock the engine when the thermostat opens. This affects fuel efficiency and engine longevity.
You can get a radiator probe for pretty cheap, it inserts between the radiator fins. You can then use a gauge to monitor coolant temps in the radiator while you are driving at different speeds and compare it to just the fan running.
Do note... w/o flaring then only radiator cover w/ fan get air from fan, the rest get little to no air flow from the fan. This means Flare can/will affect radiator cooling from the fan.
Older Fiero (86 and down) had fans w/o flaring mean ~1/3 of radiator gets little/no fan flow.
87&up has flare and a bigger fan.
Does have more differences... number, shape, pitch, size of blades and Motor RPM if different can/will affect CFM and often noise too. More confusing, 84 uses 2 speed fan setup.
Originally posted by Purple86GT: You do not want to overcool the coolant in the radiator. It should only remain slightly cooler than the engine. If it's too cold, it will shock the engine when the thermostat opens. This affects fuel efficiency and engine longevity.
Yes, This is why Stant makes SuperStat® Thermostat. You can often see this effect on the dash gauge in Winter and stopped by traffic light etc. Causes drivers to think something is major wrong but just change to SuperStat often reduce/stops this. (And even New normal Stant Tstat does this in winter.) See my Cave, Thermostat
Ogre, Do you recommend replacing the old style fan with the later style fan/shroud assembly? Are they interchangeable? I've got a fan assembly that I pulled from an '88. Would that swap into my 1986 GT without modification? I honestly have never compared the two so I have no idea.