mistaake
Real Name: Michael
I'm in the process of replacing my traditional clutch fan with an electric fan setup in my 92 305TBI. I've heard that I can gain about 5-10HP and 1-2MPG, faster warm up times, better throttle response. and better AC at idle which is why I'm doing it.
My setup is using two 14" Hayden 3690 fans (I believe they are rated at 1200cfm in free space and 1000cfm when attached to radiator). These fit perfectly side-by-size since the radiator core is 28" across.
While I'm also using the Hayden fan controller, I'm not wiring it quite the same as they recommend. I've read a lot online about these controllers failing, the relays melting, etc. So rather than running the fans off the controller I got two separate relays that are actually powering the fan, while the controller is just turning those two relays on/off. This way I don't have to worry as much about the controller leaving me stranded, and if one of those two relays running the fans goes out, they are standard and cheap and hopefully still won't leave me stranded because I'll still have one working fan.
So far my install is going well - I have the rough wiring done, and one fan wired up to testing. I'm awaiting a few things, so I can't do the final install yet so no pics and schematics at this time, but I do have a problem I've run into so far. If I start the truck now that I have removed the old clutch/fan it seems that the pulley is not properly balanced over the water pump? I did reinstall the bolt/stud things. Do I need some washers to make up for the fact that I'm not bolting the clutch/fan back on? Currently it kind of vibrates and makes a noise.
My setup is using two 14" Hayden 3690 fans (I believe they are rated at 1200cfm in free space and 1000cfm when attached to radiator). These fit perfectly side-by-size since the radiator core is 28" across.
While I'm also using the Hayden fan controller, I'm not wiring it quite the same as they recommend. I've read a lot online about these controllers failing, the relays melting, etc. So rather than running the fans off the controller I got two separate relays that are actually powering the fan, while the controller is just turning those two relays on/off. This way I don't have to worry as much about the controller leaving me stranded, and if one of those two relays running the fans goes out, they are standard and cheap and hopefully still won't leave me stranded because I'll still have one working fan.
So far my install is going well - I have the rough wiring done, and one fan wired up to testing. I'm awaiting a few things, so I can't do the final install yet so no pics and schematics at this time, but I do have a problem I've run into so far. If I start the truck now that I have removed the old clutch/fan it seems that the pulley is not properly balanced over the water pump? I did reinstall the bolt/stud things. Do I need some washers to make up for the fact that I'm not bolting the clutch/fan back on? Currently it kind of vibrates and makes a noise.