Factory Chevrolet brushless fan control with holley efi

[@sanger440]

I like that they pull very low amps at lower speeds vs just on off of 30 amp conventional fans.

[@vandettabuilds6641]

You have got to be the most professional car electronics guy in the world!!! If I ever get the money I will build another car and bring it to you. And I live in SLC Thank you for the information!!

[@brent5218]

Lots of good information here. Thank you for sharing I can provide a little added knowledge. Please avoid using the relays to switch power on/off to the fans if possible. Brushless fans often have capacitors inside them that filter electrical noise and smooth input voltage. Adding a relay can cause these capacitors to charge and discharge with use. Basically you're adding a potential failure point to your system that isn't needed, as well as increasing electrolytic wear to the capacitors in the fan motor. Best case your relays will take a beating as the caps charge and discharge, worst case you will cause the premature failure of the capacitors in your brushless motors. If GM doesn't use a relay to switch power on/off, that should be a really big indicator that you shouldn't either. Just some friendly advice from someone who knows. - Brent Chuck SPAL USA Applications Engineer

[@brent5218]

P.S. These aren't SPAL fans, but most brushless fans have internal caps. You could always measure the capacitance across the Power/Ground and verify.

[@theholleyefiguy]

The relays actually turn on with the battery kill switch I just wanted a way to segregate it from where I picked up power from. Awesome to see you comment in here, I love yalls stuff. Just wish your brushless fans would survive at 17.5 volts. Maybe get rid of that safety in there lol

[@brent5218]

@@theholleyefiguy They will survive all day at 17.5V, they just won't run. 🙂 9-16V operation for the 12V nominal fans. SPAL's first brushless fan was made for the Chevy Volt and that spec is taken right from GM's requirements. SPAL just ran with it ever since and applied it to all our 12V fans. Unfortunately it probably won't ever change. Their design goal is to only operate under conditions that are 'safe' to maximize the reliability/availability of the part. I imagine there are some 12V components that wouldn't be too happy operating at 17.5V. We could absolutely build something, but it's all about cost savings to the large OEMs who buy 99% of our fans.

[@deltapag5051]

​@theholleyefiguy the Delta PAG fans operate all the way upto 24vdc. 17-19vdc is a piece of cake. They don't care if you use a relay or not and if something happens to the electronics, no biggie, just replace the module. You don't even need to remove the fans, just swap out the ECMs. The DeltaPAG brushless motor has zero electronics in there. They're bulletproof.

[@ryanpotter5002]

Those leash relays are such a great product..

[@Sleeperdude]

Great information thanks for sharing

[@RALPHD57]

Dam, that was impressive!!! Thanks!

[@zachgrooters3404]

This is just the video I needed. I just picked up a 08 bmw 535i cooling fan that is a 19” brushless pwm and suppose to be 850watt for $20 at local pick apart. Excited to try it out and see how it works. There is very little info online about these so we will see. Thanks!

[@jo4450]

I’m running a 640i bmw 850watt fan through my terminator Holley and it works amazing

[@satanz3111]

@@jo4450Did you do the exact same settings as in this video? My fan just clicks and won’t start actually spinning.

[@jo4450]

@@satanz3111 I made a custom table for a pmw- output. The bmw fan needs to see above 5% duty cycle to start and up to 90% duty to stay on. 100% duty cycle in the fan and it thinks there could be a short to ground and it won’t fire the motor.

[@satanz3111]

@@jo4450 Yeah, pretty much same thing here. I just can’t get it to do anything besides click, regardless of frequencies or duty cycles I choose. I’ll just keep playing with it.

[@mikefew4232]

​@@satanz3111 Did you ever get your fan setup working?

[@TechMarcB]

I’ve got a 6TH GEN V8 Camaro 19 inch fan in my car. It’s a beast.

[@glacius331]

I just picked up the volt fans a week or two ago. 40 bucks for the whole assembly from a pick your part. Absolutely can't beat it Also the volt fans are only 12" fans if you're in a bit more cramped of a space. The factory shroud is also very close to fitting my griffin LS radiator

[@WoodLox]

Absolutely! Owned a 2014 and was flabbergasted when I seen it had Spal brushless well been a minute traded it in and seen one at the wrecker Friday well couldn’t resist. Out the door the fans were $124 LKQ. Each fan $350 plus the Spal shroud makes it comparable to Derale or any brushless set at $1,500. Been running Spal’s on everything built or tuned with continuous solenoids

[@Turbogto_guy]

Hat shroud is sick. I wouldn’t build one like that for under a grand. That’s a lot of work. I’d never build one for myself either, just too much time involved in that. The shroud I made is much simpler.

[@marklottero5345]

Those are insane! Thank you for making this video.

[@satanz3111]

Just hooked mine up with a Terminator X and it works just like the video…👌

[@shitmyhellcatsays]

Thank you for explaining this, I have a Hellcat fan and was wondering if I could re-use it for my race applications, apparently I can.

[@Turbochargedtwelve]

700 watts of fan, those puppies will be moving some serious air!

[@billbirmingham]

Devin. What's the size of that radiator? 2-row? 3-row? Single Pass? How's it working to keep the car cool? Looks really nice.

[@arturozarate1752]

Dude! NICE SHROUD!

[@hydrocarbon82]

Here's an argument for NOT using a relays on PWM fans: the capacitors inside are the biggest failure point of all controllers and capacitors 'wear' from constant charge/discharge cycles the most. Keeping them always powered is best & relays are just another point of failure. It's also important to not have them come on too early, otherwise you're running with your thermostat mostly closed and pulling amps for no reason.

[@theholleyefiguy]

No thermostat in this application And the relays turn on at 500 rpm

[@jefgroff8998]

Devin, what happen to that delta peg fans you got that pulled high cfm's? did they not work as advertised? was interested in their stuff. Thanks

[@adamarndt7617]

Those fans aren't cheap, but I've also been looking at them. 3,200 CFM from a single 16" and 4,100 CFM from a single 18" is bananas!

[@Turbogto_guy]

Proform now has Brushless fans. The 16” pulls 3400cfm. I have one. It’s insane how much air it moves. Don’t buy one yet though if you are reading this. Wait a month. They have a second version coming out. The first version had the safety cutoff programmed too low at 185f

[@topnotchracing81]

Put the car in neutral…those fans might move the car 😂. Cool video as always! 👍🏼👍🏼

[@adamarndt7617]

Have you ever tried with the SPAL Brushless fans? I thought for some reason they required some insanely high PWM switching speed. I like that these work with a very reasonable 100hz.

[@hectorortega2543]

How do you like these compared to the Delta PAG’s you were running previously? Any reason for the switch?

[@dandorris8531]

WOW thanks for great content.

[@bmf5150]

Excellent

[@accuratetowing8607]

Nice

[@young11984]

Did you switch from Delta Pag to these because of availability? Also wanted to mention, those amperages were at 16v and will be higher with 12v system and condition of their radiator, fin design efficiency too. Bad ass set up just wish somebody offered 12-13” blades for them to fit Mustangs stock core size

[@theholleyefiguy]

Look into the dual fans from a 2016 hellcat

[@jcook69camaro]

is there anyway you could configure it to come on at 50 percent when the a/c comes on or use a pressure sensor on the a/c to control the fans based on refrigerant pressure

[@bdevastation3609]

Super dumb questions. I just got a new trans cooler with a 8” 450cfm fan. The specs show it draws 5.1 amps. Do I need to wire in a relay or will wiring in a 7.5amp fuse be adequate? Or at what amp draw should I wire in a rely?

[@joseb1700]

Hey that air filter on the turbo can u please tell me where u got it n what size filter is that . Tia

[@tracybrush715]

I’ve watched the video a few times and I’m still unsure of how you triggered the relay. I assume it is a separate ground trigger (not the PWM output) correct? Did you just configure an open output based on temp or rpm? Thanks

[@satanz3111]

Seems to me, the normal fan output would still trigger your relay just like a regular fan. But this video creates the PWM signal to signal the brushless fans specifically.

[@HowAmINotFamous]

Would I be able to control these fans by simply running power and ground direct to the battery then using a pwm output from the term x? No other controllers needed? Since they dont run without pwm there should be no battery drain and no need for any relays correct?

[@theholleyefiguy]

correct you can

[@dreamspeedperf]

Does this work on termi x with fan outputs or would you have to use up some of the other outputs

[@theholleyefiguy]

the fan output is just a preconfigured output, dont select it and built your own output like shown in the video

[@Disneymkvii]

What alternator and pulley ratio? I seem to not be able to keep an alternator live at RPM and produce amps at idle at the same time. Either I pulley it to make amps at idle and it comes apart at RPM, or put a bigger pulley on to live at RPM and it won't do jack at idle.

[@theholleyefiguy]

This is all with our 16 volt setup. I just posted a video on it a couple days ago Check it out

[@Disneymkvii]

@@theholleyefiguy Thank you, brother! Watched it last night. I need to give Powermaster a call now.

[@theholleyefiguy]

@@Disneymkvii we have the alternators on our website hcrinnovations.com

[@Disneymkvii]

@devin vanderhoof I looked all over er and cannot find them except as an add on for the 16v battery systems. I'd need 12v.

[@trkinwithmikey]

If you're not using a smart wire and / or Holly system, what recommend pwm controller would be used?

[@theholleyefiguy]

The pwm is coming from the dominator. And that's all I'll ever recommend

[@tracybrush715]

Maybe a dumb question but I have an original Terminator. Can it be used to control a Silverado dual PWM fan?

[@theholleyefiguy]

Yes

[@michaelmerrill589]

What part of South Carolina do you live I live in Jackson South Carolina myself.

[@theholleyefiguy]

Greenville sc area

[@brettrobinson1430]

No more delta pag?

[@justinwalker2947]

Amazon drok pwm generator $10 to $20 come with variable speed. Been running a bmw fan for 2 years now Terminator xmax doesn’t offer pwm signal

[@theholleyefiguy]

Term x max absolutely can do pwm signals

[@milner1]

@@theholleyefiguy I have Deltapag fans and i believe they're +12 PWM and my Terminator X Max is -12PWM. Do I need to get -12PWM fans to make this work with the Terminator X?

[@satanz3111]

@@theholleyefiguyI’m setting up my terminator the way he set up his Dominator, but I can only get the fans to click for about 1.5 seconds with very slight movement. Then they stop. 100hz and 50% duty.

[@BEANS-O-MATICtransmissions]

What was your procedure for testing all the fans?

[@theholleyefiguy]

we monitored voltage at the source and kept it with .2 volts. measured amperage draw, used a brand new 2.5 inch thick radiator to pull thru, and then rigged up the annamometer exactly 18 inches away from the fan, then recorded all the averages and all the highest readings we got, did the math to come up with cfm. the tell tale sign is that you dont get power for free, so amperage and voltage will tell you real wattage, i feel like the factory stuff is kept at a lower rpm due to wanting it to last 100k miles. unfortunetly i dont know how to modify that lol. but the clear winner was these fans, then second place was the high power 16 inch spal brushed fans, but they were advised to not run at 16 volts so that idea got tossed out. the spals moved alot of air as well but were power hogs pretty sure they were 29.5 amps each with is wild. the beauty of brushless i didnt have a set of 16 inch delta pag so it wasnt really a fair fight for them honestly. the dual 12s did go and drew less power but its hard for a 12 to move what a 16 moves

[@deltapag5051]

​@@theholleyefiguyyeah, 12" vs 16" is not a fair comparison. Why not do a comparison with the 16" Delta PAG brushless fans? They're 16v friendly and electronics are modular and easily replaceable.

[@jamesaustin4044]

So the Delta PAG fans didn't work?

[@theholleyefiguy]

They worked Just went to a larger radiator and decided to find the absolute biggest fan setup I could. The delta pag were dual 12s these are dual 16s

[@scrapmetal_sleepers]

@@theholleyefiguy dual 16's good lord lol

[@DGGarage]

What’s your opinion on these vs the deta pag fan?

[@theholleyefiguy]

these move alot more air, but they draw more amps, are a good bit larger and are not an easy bolt on clean install

[@DGGarage]

@@theholleyefiguy I thought about throwing the delta fan on my c5 vette but I might just go this route. I am installing a holley and want a better fan because I drift my car and it does get a bit warm from time to time. I love watching your videos and the great info you provide.

[@MrSpawnamus]

I purchased 2 12” fans and shroud for 1000 bucks from Delta Pag. They were awful, would not keep my car cool what so ever. Went back to the contour fans. For my setup it was a waste of money.

[@jagharingenyoutube]

How big is your radiator?

[@theholleyefiguy]

38 by 19

[@jagharingenyoutube]

@@theholleyefiguy big thanks!

[@WoodLox]

Thank you for your knowledgeable explanation with great detail. Anything and everything, pride when you do it yourself. 🫡