Thinking of DIY'ing an Efan kit, am I missing anything?

[JimHTP]

Derale Performance Deluxe Adjustable Controllers with Pipe Threaded Probes 16749 - SummitRacing.com

Dual fan temperature control...

I6 Trailblazer DIY LS1 Dual Fan Conversion kit

PCM for less dual LS1 e-fan kit

And of course 98-06 cam/fbird e fans + custom tune ( installing cai and cat back too)

various wires, solder, heat shrink and crimp containers...

Should come to

$43 controller
$139 wiring harness
$75-100 efans

Considering this is a savings of $100 over the PCM4less plug and play and should cool even better it seems like a great idea. But i'm no EE and I'm not sure I've got everything I need. Can some more experienced electric fan DIyers help me out?

 

[Aloicious]

I know this thread is a little old, but what are your vehicle specs?

depending on the PCM you're using, you may be able to run the fans directly with the PCM control (via a custom tune), which IMO is preferable to a separate thermostat.

I've got a custom built setup running a 2 speed MarkVIII fan on my '96, and I've got it all running and controlled through my 411 PCM and it works great. makes wiring and everything else much simpler.

 

[JimHTP]

its an 04 Trailblazer with the inline 6. I actually re-posted this in the correct section after I realized it was in this one, my bad! Thanks for the suggestion though!

 

[Aloicious]

ah, okay, did you get it built yet? if you want/need I can cruize around in EFILive and see what your stock PCM has functionality for as far as the fans go, as long as I can find a tune file to look at.

 

[ScarabEpic22]

ah, okay, did you get it built yet? if you want/need I can cruize around in EFILive and see what your stock PCM has functionality for as far as the fans go, as long as I can find a tune file to look at.

P10s cant control efans, believe me Ive tried. What you have to do is either: build a box that accepts the stock PWM signal and converts that to drive the new efans (ala PCM4Less Gen 1 I6 kit), use a temp probe in the tstat housing or radiator (ala P4L Gen II I6 kit), or run an external fan controller box like the one Flex-a-Lite makes. Then use EFILive/HPTuners/TunerCats to kill the fan clutch, Ive done it on my 02 (as a test, no DTCs) and my buddy's 04.

 

[Aloicious]

That sucks. I'm mostly familiar with the ls1 pcms and earlier obd2 ones. It sounds like you guys kinda got the shaft on fan control