AC conversion - ZR-1 Net Registry Forums

Subfixer · 06-01-2019

Since my AC system is empty of R12, I'm going to convert to R134a.

I've got a new compressor on order, but I need the rest of the required parts.

Is there a list, or kit, somewhere that has everything else I'll need?

Thanks, Paul

fred · 06-01-2019

You probably don't need a compressor, unless that s a known problem or the cause of your leak...most likely culprits are Schrader valve or bad hose. Any parts store has a good conversion kit (oil and connections). Expect about a 15% loss in cooling, but it still works great in Phoenix …. for about 20 years, so.....

Ccmano · 06-01-2019

That’s a matter of much debate. Years ago we simply got the R134 oriface tube and fresh PAG oil. Evacuated, then just charged it with R134. Worked fine, never had an is issue. Today they want you to change everything. At minimum I would change out the receiver dryer simply because of age. I’m sure you will hear other opinions.
H

Subfixer · 06-01-2019

I read some articles in some past HOB issues detailing the change.

Looks like I have some work ahead of me.

Pulling the plenum anyway due to a fuel leak.

Subfixer · 06-02-2019

Did the 93-95 ZR-1 go to R134a when new?

If so, was there a different condenser?

Thanks

-=Jeff=- · 06-02-2019

Yes not sure on 93 but 94-95 were R134a.. different pieces in the system and the condenser was a parallel flow not the tube and fin used with R12

Sent from my iPhone using ZR-1 Net Registry

Subfixer · 06-02-2019

ok thanks. Since I need a new condenser, I'll get one for a 94-95 plus all the other stuff I need.

-=Jeff=- · 06-02-2019

You will need everything to my knowledge as the fitting are different and I think the oil cooler may have to change to mount correctly to the new condenser

Subfixer · 06-02-2019

Hahaha.... if it's not one thing, it's another.... the joys of owning an old car.

32valvZ · 06-02-2019

1994 was the first year for all US automobiles to be mandated to have R-134a

06-01-2019	#1
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 361	AC conversion Since my AC system is empty of R12, I'm going to convert to R134a. I've got a new compressor on order, but I need the rest of the required parts. Is there a list, or kit, somewhere that has everything else I'll need? Thanks, Paul __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

06-01-2019	#2
fred Join Date: Aug 2004 Location: Phoenix Posts: 59	Re: AC conversion You probably don't need a compressor, unless that s a known problem or the cause of your leak...most likely culprits are Schrader valve or bad hose. Any parts store has a good conversion kit (oil and connections). Expect about a 15% loss in cooling, but it still works great in Phoenix …. for about 20 years, so.....

06-01-2019	#3
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: AC conversion That’s a matter of much debate. Years ago we simply got the R134 oriface tube and fresh PAG oil. Evacuated, then just charged it with R134. Worked fine, never had an is issue. Today they want you to change everything. At minimum I would change out the receiver dryer simply because of age. I’m sure you will hear other opinions. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

06-01-2019	#4
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 361	Re: AC conversion I read some articles in some past HOB issues detailing the change. Looks like I have some work ahead of me. Pulling the plenum anyway due to a fuel leak. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

06-02-2019	#5
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 361	Re: AC conversion Did the 93-95 ZR-1 go to R134a when new? If so, was there a different condenser? Thanks __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

06-02-2019	#6
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,136	Re: AC conversion Yes not sure on 93 but 94-95 were R134a.. different pieces in the system and the condenser was a parallel flow not the tube and fin used with R12 Sent from my iPhone using ZR-1 Net Registry __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - 3" Magnaflow Bullet cats - LT4 Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

06-02-2019	#7
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 361	Re: AC conversion ok thanks. Since I need a new condenser, I'll get one for a 94-95 plus all the other stuff I need. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

06-02-2019	#8
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,136	Re: AC conversion You will need everything to my knowledge as the fitting are different and I think the oil cooler may have to change to mount correctly to the new condenser __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - 3" Magnaflow Bullet cats - LT4 Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

06-02-2019	#9
Subfixer Join Date: Sep 2018 Location: Groton, CT Posts: 361	Re: AC conversion Hahaha.... if it's not one thing, it's another.... the joys of owning an old car. __________________ 1992 ZR1 #442, 2 tops, White, White, Haibeck 415, 3.90 gear, Coilovers 2018 Audi RS5, 2.9 V6 Twin Turbo, Auto, Black, Black 2021 Audi Q3, 2.0T, 8 spd Tiptronic, Navarro Blue metallic, Pearl Beige

06-02-2019	#10
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: AC conversion 1994 was the first year for all US automobiles to be mandated to have R-134a __________________ [B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B]