"Correct procedure for E. Fan Setup"
Rotary Enthusiast
Joined: Aug 2002
Posts: 1,273
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From: Kansas
also keep in mind if your elec system is already taxed and you're adding something else to that, it's going to affect other items.
In other words, w/ the stock fan on there, yeah it may be a parasitic drag on the motor, but that's it. With an e-fan, as NZ said, it's still some sort of drag on the motor, but you have also compromised the rest of your electrical system and you now may have charging issues, dim headlights, and other electrical gremlins. In addition you may now have a 70% effective e-fan because it's also not receiving the power it should. In other words, you've lowered your cooling ability more than you expected as well as introduced other problems.
now again, having said that, I still choose to go e-fan. I think the appearance is good and it cleans up the engine bay IMO. Probably also creates some room in there if you need it. But I'm also taking steps to improve the electrical system w/ an FD alt as well as I'll be adding additional grounding, removing other electrical devices and excess wiring (switching to standalone).
In other words, w/ the stock fan on there, yeah it may be a parasitic drag on the motor, but that's it. With an e-fan, as NZ said, it's still some sort of drag on the motor, but you have also compromised the rest of your electrical system and you now may have charging issues, dim headlights, and other electrical gremlins. In addition you may now have a 70% effective e-fan because it's also not receiving the power it should. In other words, you've lowered your cooling ability more than you expected as well as introduced other problems.
now again, having said that, I still choose to go e-fan. I think the appearance is good and it cleans up the engine bay IMO. Probably also creates some room in there if you need it. But I'm also taking steps to improve the electrical system w/ an FD alt as well as I'll be adding additional grounding, removing other electrical devices and excess wiring (switching to standalone).
wow. mazda sucks at electrical work dont they? i think i will keep my stock fan cuz i dont need any more headaches with this car. also, i like the idea that the fan is cooling so much at high rpms 
Like Ghandi with a gun
Joined: Mar 2003
Posts: 4,584
Likes: 0
From: Rapid City, SD
Originally posted by oregano
"
Wouldn't the stock fan GREATLY decrease throttle response and how fast the engine revs? In my mind i see it as a heavy flywheel kinda
"
Wouldn't the stock fan GREATLY decrease throttle response and how fast the engine revs? In my mind i see it as a heavy flywheel kinda
The fact that it is a clutch fan is why you can turn the fan blades without turning the engine. The below is an example of a fan that when you turn the fan, the engine crank turns...
Its not like a hard fan like on old muscle cars, where the fan is the same rpm as the engine. My buddy has a 79 camaro, and we got a new fan assembly. Its hard to the rpm, and I stood behind it when he rev'd to about 4000 rpm. Freaking wind tunnel.
If our cars had that type of fan, then yes it would have the affect of a heavy flywheel...
most of those fans are rated at 6k rpm, which basicaly means that the stability of the fan is unpredictable after the engine reaches 6000 rpm.
In reality his engine is a high torque mother that see's its hp below 4.5k anyhow.
Last edited by Kenteth; Nov 26, 2003 at 12:38 AM.
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