r12 to r134a conversion question - ZR-1 Net Registry Forums

jrd1990zr1 · 2 Weeks Ago

I recall that I read somewhere that it takes less R134a to charge the system than R12. Does anyone have information on the amount of R134A is needed for a full charge in a 1990 ZR1 AC system?

Thanks

-=Jeff=- · 2 Weeks Ago

I thought it was around 75% of r12

dredgeguy · 1 Week Ago

I checked with Marc Haibeck as my system was changed to R-134a. His response:

The refrigerant is measured by weight. It should have 1 lb. 14.6 oz of R-134a.

Hope that helps

2 Weeks Ago	#1
jrd1990zr1 Join Date: Dec 2005 Location: Delanson, NY Posts: 909	r12 to r134a conversion question I recall that I read somewhere that it takes less R134a to charge the system than R12. Does anyone have information on the amount of R134A is needed for a full charge in a 1990 ZR1 AC system? Thanks __________________ 1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold)

2 Weeks Ago	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,137	Re: r12 to r134a conversion question I thought it was around 75% of r12 __________________ 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

1 Week Ago	#3
dredgeguy Join Date: Aug 2012 Location: Ellicott City, MD Posts: 1,635	Re: r12 to r134a conversion question I checked with Marc Haibeck as my system was changed to R-134a. His response: The refrigerant is measured by weight. It should have 1 lb. 14.6 oz of R-134a. Hope that helps __________________ Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa