small experiment request - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ayousef · 11-29-2013, 08:31 AM

Hey guys,

noticed something weird and I'm wondering if you guys can help me verify this (or not). I sent my stock radiator to Ron Davis about a year ago to them to build me a custom radiator for the beast and thats when I noticed that both fans on the fan shroud actually had different blades, in other words they were different fans and I haven't ever seen this before.

A few days ago I was checking if both fans were working put my hand behind the driver side fan and yes its blowing, did the same for the passenger side fan and no nothing, pointed my flashlight at the fan yes it was working. Then while going to bed I remembered the design of the vent on the ZL1 hood and wondered if one fan is actually a pusher fan in this case the passenger side fan.

Not sure this even makes any sense, but I'm hoping you guys can try to feel both fans and see if you come up with the same conclusion perhaps?

Thanks.

Trackman · 11-29-2013, 08:50 AM

hmm....very curious
So your saying the leading edge of one fan is on the right and the other fans leading edge on the left?
Are the fans spinning the same direction

ayousef · 11-29-2013, 09:28 AM

based on this pic if they're spinning the same direction they should both be puller fans, but why are the blades different? Also I need to examine the fans a little closer. Now the fan could be spinning in the opposite direction, I dunno.

I just know that I felt almost or maybe absolutely no air coming out of the passenger side fan even though it was spinning quite fast.

kaamacat · 11-29-2013, 09:29 AM

If your fans are between radiator and engine, then they are pullers. (It is very possibly your other fan was wired backwards by accident)

kaamacat · 11-29-2013, 09:31 AM

One other item.... most likely (typically) one of the fans is associated with your A/C unit and is on under AC-ON operation....the other by thermostat control. One fan should always come on when your A/C is on.

ayousef · 11-29-2013, 09:38 AM

Quote:

Originally Posted by kaamacat

One other item.... most likely (typically) one of the fans is associated with your A/C unit and is on under AC-ON operation....the other by thermostat control. One fan should always come on when your A/C is on.

no one ever touched the wiring its a click-on connector as well so you can't install it the other way around either.

anyways, look at the vents in the hood they aren't symmetrical either not sure if that suggests anything?

Since you have a ZL1 why don't you fire it up and try out what I asked for?

Thanks.

HOJO · 11-29-2013, 09:44 AM

What Kaamacat said. Makes more since and most cars work this way. Blade difference may be base on amount of air that fan needs to pull.

ayousef · 11-29-2013, 09:47 AM

Quote:

Originally Posted by HOJO

What Kaamacat said. Makes more since and most cars work this way. Blade difference may be base on amount of air that fan needs to pull.

thats what I've been thinking for the past year, I hope we leave common sense out of this because not EVERYthing makes sense until you understand why, so I'm asking again for those who have a ZL1 can you please do the test and leave all the speculation aside? lol

joes407 · 11-29-2013, 10:02 AM

I only have factory fans but both look like the large blade fan on the right side of your pic. both spin the same direction but the one on the right comes on with the engine and the driver side one comes on when I turn on the a/c

ayousef · 11-29-2013, 10:06 AM

Quote:

Originally Posted by joes407

I only have factory fans but both look like the large blade fan on the right side of your pic. both spin the same direction but the one on the right comes on with the engine and the driver side one comes on when I turn on the a/c

my fans are factory too, so if both your fans are the same why are mines different

Happy_Dan · 11-29-2013, 11:08 AM

I'll look at mine when I get home if you don't have your answer by then.

Mattzl1 · 11-29-2013, 11:16 AM

Maybe what is happening is that only the drivers side fan is calling to run and is pulling in air through the back side of the passenger side fan making it spin backwards.

Midnight Rat · 11-29-2013, 12:06 PM

I just looked and my 1le has the same fans on as yours. Even checked my wife's honda and the same thing. Hope that helps

joes407 · 11-29-2013, 02:28 PM

Quote:

Originally Posted by ayousef

my fans are factory too, so if both your fans are the same why are mines different

quite possibly your car has a fan from another supplier mid run. id be curious to see how many people have the small blade fan. my car is an early 2012

11-29-2013, 08:31 AM	#1
ayousef Drives: 2013 ZL1 Join Date: Oct 2012 Location: Dubai Posts: 757	small experiment request Hey guys, noticed something weird and I'm wondering if you guys can help me verify this (or not). I sent my stock radiator to Ron Davis about a year ago to them to build me a custom radiator for the beast and thats when I noticed that both fans on the fan shroud actually had different blades, in other words they were different fans and I haven't ever seen this before. A few days ago I was checking if both fans were working put my hand behind the driver side fan and yes its blowing, did the same for the passenger side fan and no nothing, pointed my flashlight at the fan yes it was working. Then while going to bed I remembered the design of the vent on the ZL1 hood and wondered if one fan is actually a pusher fan in this case the passenger side fan. Not sure this even makes any sense, but I'm hoping you guys can try to feel both fans and see if you come up with the same conclusion perhaps? Thanks. __________________ 1150bhp Whipple 4.0 Supercharged 427ci Camaro ZL1

11-29-2013, 09:28 AM	#3
ayousef Drives: 2013 ZL1 Join Date: Oct 2012 Location: Dubai Posts: 757	based on this pic if they're spinning the same direction they should both be puller fans, but why are the blades different? Also I need to examine the fans a little closer. Now the fan could be spinning in the opposite direction, I dunno. I just know that I felt almost or maybe absolutely no air coming out of the passenger side fan even though it was spinning quite fast. __________________ 1150bhp Whipple 4.0 Supercharged 427ci Camaro ZL1

11-29-2013, 09:29 AM	#4
kaamacat Drives: 2018 ZL1/1LE Red Join Date: Oct 2013 Location: Cumming, GA Posts: 321	If your fans are between radiator and engine, then they are pullers. (It is very possibly your other fan was wired backwards by accident) __________________ BobR 2018 ZL1 1LE (Red) - New Dec 2017 2015 ViperGT (Gunmetal w/Red stripes) 2013 ZR1 Anniversary 2014 ZL1 - BrightYellow, 6sp 2011 Porsche GT3RS - White w/red graphics 2009 Porsche C2S 2001 Ferrari 360

11-29-2013, 09:31 AM	#5
kaamacat Drives: 2018 ZL1/1LE Red Join Date: Oct 2013 Location: Cumming, GA Posts: 321	One other item.... most likely (typically) one of the fans is associated with your A/C unit and is on under AC-ON operation....the other by thermostat control. One fan should always come on when your A/C is on. __________________ BobR 2018 ZL1 1LE (Red) - New Dec 2017 2015 ViperGT (Gunmetal w/Red stripes) 2013 ZR1 Anniversary 2014 ZL1 - BrightYellow, 6sp 2011 Porsche GT3RS - White w/red graphics 2009 Porsche C2S 2001 Ferrari 360

11-29-2013, 11:16 AM	#12
Mattzl1 Drives: 2013 ZL1 Join Date: Jul 2012 Location: upstate New York Posts: 166	Maybe what is happening is that only the drivers side fan is calling to run and is pulling in air through the back side of the passenger side fan making it spin backwards. __________________ 2013 ZL1 AGM, ECF, A6, sunroof, black rims mods complete! 664 RWHP, 645 RWTQ Ported snout, 2.5 upper, Innovators west balancer with 9.1 lower, New era intake, American Racing long tube headers with hollow cats and X pipe, KDI heat exchanger, ID850's, TS29 cam ! Last edited by Mattzl1; 11-29-2013 at 11:40 AM.

11-29-2013, 08:50 AM	#2
Trackman Drives: 67RS Camaro ,Black 2013 ZL1 Join Date: Jun 2010 Location: Alberta Posts: 1,408	hmm....very curious So your saying the leading edge of one fan is on the right and the other fans leading edge on the left? Are the fans spinning the same direction

11-29-2013, 09:44 AM	#7
HOJO Drives: 2014 Camaro SS/RS 1LE 1967 Camaro Join Date: Oct 2013 Location: Fort Wayne, IN Posts: 874	What Kaamacat said. Makes more since and most cars work this way. Blade difference may be base on amount of air that fan needs to pull.

11-29-2013, 10:02 AM	#9
joes407 Drives: 2014 ZL1m6 red hot #569 Join Date: Dec 2009 Location: florida Posts: 2,422	I only have factory fans but both look like the large blade fan on the right side of your pic. both spin the same direction but the one on the right comes on with the engine and the driver side one comes on when I turn on the a/c

11-29-2013, 11:08 AM	#11
Happy_Dan Happy_Dan Drives: 2012 IOM Camaro ZL1 #569 Join Date: Dec 2011 Location: New Boston, NH Posts: 2,239	I'll look at mine when I get home if you don't have your answer by then.

11-29-2013, 12:06 PM	#13
Midnight Rat Drives: SS 1LE Join Date: Nov 2012 Location: Texas Posts: 1,829	I just looked and my 1le has the same fans on as yours. Even checked my wife's honda and the same thing. Hope that helps