Hello! I am doing a 3G Alt swap and adding contour fans to my 89 coupe. Do I need to run a separate power wires for the Alt and the fan or can I run a 4 gauge from the drivers side positive to a junction on the passenger side. At the junction feed the Alt and the fan with separate lines?
I personally would run them separate. I would run a dedicated line from the alternator with a fusable link(s) or an inline fuse capable of 130-150 amps to the stock alternator connection location. I would then run a separate fused circuit for the fan with a high quality bosch 4/5 wire relay. Being the OCD person I am, I would also find sending unit I can mount in the intake manifold (coolant passage) or in the thermostat housing to automatically control the relay. Too many people forget to turn on the switch. Something like this
://kwikwire.com/temperature-thermostat-switch-190-degrees/
or https://www.summitracing.com/parts/der-16731/overview/
If you want to be really slick, you can easily convert to a 94/95 ecu and use the ecu to control that fan. There is lots of info on www.efidynotuning.com on exactly what is needed to do it.
I personally would run them separate. I would run a dedicated line from the alternator with a fusable link(s) or an inline fuse capable of 130-150 amps to the stock alternator connection location. I would then run a separate fused circuit for the fan with a high quality bosch 4/5 wire relay. Being the OCD person I am, I would also find sending unit I can mount in the intake manifold (coolant passage) or in the thermostat housing to automatically control the relay. Too many people forget to turn on the switch. Something like this
://kwikwire.com/temperature-thermostat-switch-190-degrees/
or https://www.summitracing.com/parts/der-16731/overview/
If you want to be really slick, you can easily convert to a 94/95 ecu and use the ecu to control that fan. There is lots of info on EFIDynoTuning on exactly what is needed to do it.
Hopefully the poster will not adjust the throttle stop, if it starts to stall
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ford Mustang Forums
9.8M posts
200.6K members
Since 2001
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more!