Weak fans inside car at highest setting. - Page 2 - ZR-1 Net Registry Forums

Flyman 27 · 07-15-2020

When mine was giving me problems with fan speed/power, it turned out to be the fan speed controller on top of the A/C plenum under the hood.

-=Jeff=- · 07-15-2020

Yeah I think is it more along the line of working fine but the amount of air being pushed is weak

XfireZ51 · 07-15-2020

Have same issue. Do u just get a new one, or repair the old?

Ccmano · 07-15-2020

Quote:

Originally Posted by Flyman 27

When mine was giving me problems with fan speed/power, it turned out to be the fan speed controller on top of the A/C plenum under the hood.

This was my issue. When I removed it I actually found one of the connectors burned. The new one made a nice improvement. Still not great but better.
H

Paul Workman · 07-18-2020

Quote:

Originally Posted by secondchance

I followed suit and also installed 200 amp hair pin alternator along with a pair of Spal fans, extra 8 ga. Wire between the alternator and the battery plus 14 ga. between the battery and the HVAC module. Combination of extra cooling of ac condenser and extra oomph at HVAC condenser, it felt nice and cool even in 96 degree day in DC. This is with glass top.

Good 2 Know!

XfireZ51 · 07-18-2020

Speaking of keeping cool, a good friend of mine is a car enthusiast currently owning a 65 Vette convertible, MB 300 series, and an AMG GTR. He has had ceramic glass tint installed which is claimed to cut solar load down significantly.
Anyone else here use that, and if so, what?s ur experience? For those of us w base C4 windshields, that would really help in keeping cool w AC.

-=Jeff=- · 07-18-2020

My manual AC blows 11.7mph out the vents.. not sure how much more I can squeak out of it. I have something to try though

-=Jeff=- · 07-18-2020

So I compared the output of my corvette 11.7mph on max vs my 2016 charger which seems like a lot more.. Apparently it is not.. the blower on the Charge is 11.3 mph.

I am starting to think it is just the weak temperature differential between the ambient and out the vent temperature due to the undersized compressor.. too bad the 10PA19 doesn't fit vs the 10PA17.

So I am really not sure what if any improvement I personally would get if I was able to squeak out more speed. I will try my experiment as it will run separately form the AC setup and i can see if it will be worth it to me..

Subfixer · 07-19-2020

I don't know the wind speed of my AC, but yesterday it was 90*+ at 80% humidity. AC kept the interior cool at 70*.
My system is converted to 134a.
One thing I noted, there is a screen in the AC box (engine compartment side) that can be clogged with debris. Even at 20K miles, mine was already half blocked.
There is also has a seal that helps the air flowing through the evaporator.
Inspection of both required removing half the air plenum from the firewall.

-=Jeff=- · 07-19-2020

Is fixed,

I assume the outer side of the HVAC box... what did you do to clean out the screen? And where specifically is the seal you are referring to?

07-15-2020	#11
Flyman 27 Join Date: Apr 2017 Location: Wayne Illinois Posts: 400	Re: Weak fans inside car at highest setting. When mine was giving me problems with fan speed/power, it turned out to be the fan speed controller on top of the A/C plenum under the hood. __________________ [SIGPIC][/SIGPIC] 91-#1935 Black/black & gray, Haibeck 500 Cams by Pete

07-15-2020	#12
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,157	Re: Weak fans inside car at highest setting. Yeah I think is it more along the line of working fine but the amount of air being pushed is weak __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978

07-15-2020	#13
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,685	Re: Weak fans inside car at highest setting. Have same issue. Do u just get a new one, or repair the old?

07-18-2020	#16
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,685	Re: Weak fans inside car at highest setting. Speaking of keeping cool, a good friend of mine is a car enthusiast currently owning a 65 Vette convertible, MB 300 series, and an AMG GTR. He has had ceramic glass tint installed which is claimed to cut solar load down significantly. Anyone else here use that, and if so, what?s ur experience? For those of us w base C4 windshields, that would really help in keeping cool w AC.

07-18-2020	#17
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,157	Re: Weak fans inside car at highest setting. My manual AC blows 11.7mph out the vents.. not sure how much more I can squeak out of it. I have something to try though __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978

07-19-2020	#19
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 396	Re: Weak fans inside car at highest setting. I don't know the wind speed of my AC, but yesterday it was 90+ at 80% humidity. AC kept the interior cool at 70. My system is converted to 134a. One thing I noted, there is a screen in the AC box (engine compartment side) that can be clogged with debris. Even at 20K miles, mine was already half blocked. There is also has a seal that helps the air flowing through the evaporator. Inspection of both required removing half the air plenum from the firewall. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2021 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige