A/C gauge readings - ZR-1 Net Registry Forums

92whiteZ · 07-07-2014

I thumbed through the Service Manual but didnt see what i was looking for.

What should the high & low side gauges read when the system is fully charged?

this is for a 1992 with a R12 system that is all original.

many thanks!

-=Jeff=- · 07-07-2014

What is the Ambient Temperature outside? Humidity?

This should help

cvette98pacecar · 07-08-2014

Keep in mind that your pressure is actually going to be a little higher than what the PT chart says unless you have a big box fan moving air across your condenser.

92whiteZ · 07-08-2014

Thank you everyone and don't know how i missed that chart.

Temps tend to be high 70's/low 80's, humidity around 45-50%. will make note of higher temps without a fan blowing across the condenser.

as always this group is top notch and extremely helpful.

big thanks to all.

Dynomite · 07-08-2014

Excellent Information Jeff....thanks

Quote:

Originally Posted by -=Jeff=-

What is the Ambient Temperature outside? Humidity?

This should help

-=Jeff=- · 07-08-2014

Also looking at the PT chart you can see why R134a will put a bigger drag on the motor than R12

07-07-2014	#1
92whiteZ Join Date: Sep 2013 Location: Los Angeles, CA Posts: 122	A/C gauge readings I thumbed through the Service Manual but didnt see what i was looking for. What should the high & low side gauges read when the system is fully charged? this is for a 1992 with a R12 system that is all original. many thanks!

07-07-2014	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: A/C gauge readings What is the Ambient Temperature outside? Humidity? This should help __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

07-08-2014	#3
cvette98pacecar Join Date: May 2011 Location: Sydney, Australia Posts: 2,479	Re: A/C gauge readings Keep in mind that your pressure is actually going to be a little higher than what the PT chart says unless you have a big box fan moving air across your condenser. __________________ Robert J. DeMarco [SIGPIC][/SIGPIC] [COLOR=blue]G[/COLOR][COLOR=red]rand[/COLOR] [COLOR=blue]S[/COLOR][COLOR=red]port[/COLOR] Registry Lifetime Member NCM Lifetime Member #2655 Pacecar Registry Member [COLOR=red]ZOOM Charter Member - ZR-1 Owners of Michigan[/COLOR] [COLOR=plum][I]ZR-1[/I] Registry member since 2012 [/COLOR] [COLOR=black]1990 LPE "368" Aerobody ZR-1, Last ZR-1 built by John[/COLOR] 1991 Callaway Aerobody ZR-1, DRM 500 1991 Shinoda Aerobody Spyder, 1998 Pace Car

07-08-2014	#4
92whiteZ Join Date: Sep 2013 Location: Los Angeles, CA Posts: 122	Re: A/C gauge readings Thank you everyone and don't know how i missed that chart. Temps tend to be high 70's/low 80's, humidity around 45-50%. will make note of higher temps without a fan blowing across the condenser. as always this group is top notch and extremely helpful. big thanks to all.

07-08-2014	#6
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: A/C gauge readings Also looking at the PT chart you can see why R134a will put a bigger drag on the motor than R12 __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978