Ok guys I’m trying to circle in on how I want to drive my fans and need a little help. There’s probably 15 different ways to do it but here’s where I’m at:
• Must be PWM other than that I’m open
Currently I have:
• Holley HP ECU
• 2 C6 PWM modules
• 2 13” Spal Brushed Fans (VA13-AP70/LL-63A
Full disclosure I tracked it and drove it for 18mths with I C6 PWM driving both fans but mid way through something “gave up” and the fans wouldn’t come on. So at the track I wired in two relay’s to drive my fans (on off). Never figured out why they stopped, just assumed I couldn’t drive both fans with 1 PWM modules. After that the car went into paint and everything came off.
Ok now its 2020 (which sucks for its own reasons) I’m putting everything back together and I’m doing a little research. First thought…did I screw up and try to drive PWM with a brushed fan? The Fans worked perfectly after I wired them to relays but did I fry the PWM?
So here’s my thought process
In Option #1 in my picture was my initial thought was just add another PWM but the more I read up about it, not sure you can do that with brushed fans.
Option #2: swap out fans with brushless fans and drive them with the Holley ECU and the Spal fans use a temp sensor to adj speed.
Option #3: same as option #2 but use the PWM table in the ECU to drive speed.
Any guidance or help would be appreciated