CB7Tuner Forums

Go Back   CB7Tuner Forums > Parts & Performance > Technical

Reply
 
Thread Tools Rate Thread Display Modes
Old 06-07-2018, 07:59 PM   #21
F22Chris
CB7tuner Member
 
Join Date: Apr 2013
Location: Atlanta
Posts: 1,120
F22Chris is very helpful F22Chris is very helpful
Zombie, youíre right, but when the system is off, the low side pressure would just read the pressure of the can of refrigerant correct?
__________________
F22Chris is offline   Reply With Quote
Old 06-07-2018, 08:12 PM   #22
Size9zombie
CB7tuner Member
 
Join Date: Feb 2016
Location: 'Merica
Posts: 92
Size9zombie is cool... so far.
The can of refrigerant should be over 100 psi in its full unused form, and static pressure where i am at in N.C. would be about 100 psi on an A/C system. If you are at 5,000 feet I haven't got a clue what the pressure would/should actully be. Anyone that lives at that altitude have a clue?? You should be able to charge the system with the small cans you buy at the auto parts stores, I have never heard of anyone having a problem, not to say that people haven't. Anything is possible I guess.

Edit* I really wouldn't trust the gauge on the can of refrigerant you buy from the parts store, it is not to be substituted for a proper manifold gauge. Not saying you would, just puting it out there for everyone that may see this in the future.

Last edited by Size9zombie; 06-07-2018 at 08:21 PM.
Size9zombie is offline   Reply With Quote
Old 06-07-2018, 10:24 PM   #23
F22Chris
CB7tuner Member
 
Join Date: Apr 2013
Location: Atlanta
Posts: 1,120
F22Chris is very helpful F22Chris is very helpful
Well of course one shouldnít trust the gauge on the part store specials, but as soon as you open up the low side, the pressure reading will still read pressure off the can right? Given a higher reading, but you would negate this reading till itís running to make sure the system is good to go?

Iíve always added refrigerant with the vehicle running when converting my r12 systems. Never hooked it to the actual machine as to not contaminate it, so I just use the typical gauges, pump, and heater belt for the r134 tank. Iíve never had a problem doing it this way.

I guess what Iím trying to say is do you fill when off for the sole purpose of not blowing shit up and having damage claims, or are there other reasons?
__________________
F22Chris is offline   Reply With Quote
Old 06-07-2018, 10:52 PM   #24
Ghostwhite
CB7tuner Member
 
Join Date: Sep 2017
Location: Twin Cities, MN
Posts: 42
Ghostwhite is cool... so far.
Quote:
Originally Posted by zedjr10 View Post
The reason is because i look things up by specific questions as i know nobody is going to come out here and tell me step for step what to do. All my questions i try to be specific cause i need to understand all this myself. TUtorials and DIY are great but no way can u follow an exact tutorial step for step. Unless it was like changing your oil and even that varies car to car and circumstances. Things are always different and sometimes just wrong in tutorial. SO i watch many tutorials and ask things i think i need to know. And as with ac systems. I have never done this type of thing before. So i start out not having a clue about nothing. Just a bunch of assumptions.
My point is you don't have to create a new thread for every single question you have, you can ask in the ongoing thread you already started related to Air-Conditioning.

The forum model is based on discussions and the discussion will evolve to cover a broad area if you let them. Part of that is more questions as some get answered and raise the need for additional info, these questions can be contained in the original thread instead of wanting every question to become a new topic.
Ghostwhite is offline   Reply With Quote
Old 06-07-2018, 11:02 PM   #25
illinois_erik
CB7tuner Member
 
Join Date: Jan 2009
Posts: 2,100
illinois_erik is very helpful illinois_erik is very helpful illinois_erik is very helpful
Refrigerants pressure is mostly based on its temperature but..


Heres a refrigerant conversion chart for +5000' ASL.

http://www.emersonclimate.com/Docume...7%20R4.pdf

The more accurate you are measuring them ambient temp the more precise your pressure target will be.

I dont remember if the cars evap has a TXV valve or not, but to ensure you have the correct charge youll need to do a superheat measurement, if it does have a TXV youll need to do a subcooling measurement.
I doubt it has one though being so old its probably just an orifice.

Reading all your other posts on the subject it sounds like you fucked something up with your monkeying around. Now you need to recover all the refrigerant and pull a vacuum to 500 microns and make sure its held for a half hour or more. To achieve this deep vacuum will take some time esp at altitude. If you dont get it down to proper vacuum levels you might as well stop fucking with it.

Have a read --> https://mechanics.stackexchange.com/...fter-ac-repair
__________________

Last edited by illinois_erik; 06-07-2018 at 11:06 PM.
illinois_erik is offline   Reply With Quote
Old 06-07-2018, 11:43 PM   #26
zedjr10
Gold Member
 
Join Date: Jan 2017
Location: Denver, Colorado
Posts: 603
zedjr10 may have said something they shouldn't have...
Quote:
Originally Posted by Ghostwhite View Post
My point is you don't have to create a new thread for every single question you have, you can ask in the ongoing thread you already started related to Air-Conditioning.

The forum model is based on discussions and the discussion will evolve to cover a broad area if you let them. Part of that is more questions as some get answered and raise the need for additional info, these questions can be contained in the original thread instead of wanting every question to become a new topic.
Whatever man. WHo are you to dictate to who how one should ask a question. People ask in their own way on how to help them best. hence why i ask here and not at other sites. Cause other sites get alot of that crap of man why don't you just do this or don't ask that as i should know or something. Cause people just like you tell others how things should be and asked and answered. You can go blow that up ur hootoo. If you don't want to help then just don't answer.
zedjr10 is offline   Reply With Quote
Old 06-07-2018, 11:53 PM   #27
zedjr10
Gold Member
 
Join Date: Jan 2017
Location: Denver, Colorado
Posts: 603
zedjr10 may have said something they shouldn't have...
Quote:
Originally Posted by illinois_erik View Post
Refrigerants pressure is mostly based on its temperature but..


Heres a refrigerant conversion chart for +5000' ASL.

http://www.emersonclimate.com/Docume...CT-27%20R4.pdf

The more accurate you are measuring them ambient temp the more precise your pressure target will be.

I dont remember if the cars evap has a TXV valve or not, but to ensure you have the correct charge youll need to do a superheat measurement, if it does have a TXV youll need to do a subcooling measurement.
I doubt it has one though being so old its probably just an orifice.

Reading all your other posts on the subject it sounds like you fucked something up with your monkeying around. Now you need to recover all the refrigerant and pull a vacuum to 500 microns and make sure its held for a half hour or more. To achieve this deep vacuum will take some time esp at altitude. If you dont get it down to proper vacuum levels you might as well stop fucking with it.

Have a read --> https://mechanics.stackexchange.com/...fter-ac-repair
Good info THanks. I got the same chart and i thought was for sea level. i am starting to gather that at altitude for charging doesn't matter. As i can find nothing that shows different altitude recommended high pressure readings. I already vacuumed it today. Close to 90 minutes and charged it with 2.5 cans. I wonder if 1.8 cfm on the pump is ok. All pumps i see sold at store are at least 2.5 cfm. AC Compressor cycles off fine at nighttime. During the day it is a different story.
zedjr10 is offline   Reply With Quote
Old 06-08-2018, 12:02 AM   #28
Ghostwhite
CB7tuner Member
 
Join Date: Sep 2017
Location: Twin Cities, MN
Posts: 42
Ghostwhite is cool... so far.
Quote:
Originally Posted by zedjr10 View Post
Whatever man. WHo are you to dictate to who how one should ask a question. People ask in their own way on how to help them best. hence why i ask here and not at other sites. Cause other sites get alot of that crap of man why don't you just do this or don't ask that as i should know or something. Cause people just like you tell others how things should be and asked and answered. You can go blow that up ur hootoo. If you don't want to help then just don't answer.
I am absolutely not telling you to stop asking questions, I am suggesting that starting a new thread for each question isn't necessary.

This thread has answered a few of your questions and you had more questions so you asked and got more answers. That is how it is supposed to work.

Again, I am not trying to judge your questions! Only advocating towards less new threads when you already have a discussion going with answers flowing in.
Ghostwhite is offline   Reply With Quote
Old 06-08-2018, 01:02 AM   #29
zedjr10
Gold Member
 
Join Date: Jan 2017
Location: Denver, Colorado
Posts: 603
zedjr10 may have said something they shouldn't have...
Quote:
Originally Posted by Ghostwhite View Post
I am absolutely not telling you to stop asking questions, I am suggesting that starting a new thread for each question isn't necessary.

This thread has answered a few of your questions and you had more questions so you asked and got more answers. That is how it is supposed to work.

Again, I am not trying to judge your questions! Only advocating towards less new threads when you already have a discussion going with answers flowing in.
You can't let it go. Who cares. If you don't want to answer and help. THen don't. I dont give a shit if u don't answer. So please mister genius. Answer my original question. Why after 3 cans, that's at 36 ounces is my system still reading low on both gauges. GOsh like i care. It is rhetorical. I mean i do understand that at most i got 31 ounces in system and at least 25 and still acts like it is low(it is r134a and not r12 with your 30 ounces recommendation). Maybe the high pressure sensor isn't working, right. Maybe the ac thermostat. Maybe my 1.8 cfm vacuum isn't pulling the -2 plus in in/hg it needs to boil the moisture off. All questions i have. Please man. Just stop it. You never even tried cause you like arguing. Please just stop. I think in the last week i have learned more about ac systems than you ever knew.
zedjr10 is offline   Reply With Quote
Old 06-08-2018, 02:02 AM   #30
illinois_erik
CB7tuner Member
 
Join Date: Jan 2009
Posts: 2,100
illinois_erik is very helpful illinois_erik is very helpful illinois_erik is very helpful
sorry the conversion chart for altitude is the PDF link. the image attached is for sea level. Also the car does have a thermo expansion valve so youd want to do subcooling measurements.

https://www.carid.com/1992-honda-acc...%5D%5B%5D=2.2L


__________________

Last edited by illinois_erik; 06-08-2018 at 02:09 AM.
illinois_erik is offline   Reply With Quote
Old 06-08-2018, 03:59 AM   #31
Ghostwhite
CB7tuner Member
 
Join Date: Sep 2017
Location: Twin Cities, MN
Posts: 42
Ghostwhite is cool... so far.
Quote:
Originally Posted by zedjr10 View Post
You can't let it go. Who cares. If you don't want to answer and help. THen don't. I dont give a shit if u don't answer. So please mister genius. Answer my original question. Why after 3 cans, that's at 36 ounces is my system still reading low on both gauges. GOsh like i care. It is rhetorical. I mean i do understand that at most i got 31 ounces in system and at least 25 and still acts like it is low(it is r134a and not r12 with your 30 ounces recommendation). Maybe the high pressure sensor isn't working, right. Maybe the ac thermostat. Maybe my 1.8 cfm vacuum isn't pulling the -2 plus in in/hg it needs to boil the moisture off. All questions i have. Please man. Just stop it. You never even tried cause you like arguing. Please just stop. I think in the last week i have learned more about ac systems than you ever knew.
Your comprehension is terrible.
Ghostwhite is offline   Reply With Quote
Old 06-08-2018, 08:27 PM   #32
ukemike
CB7tuner Member
 
Join Date: Feb 2015
Location: Marin County, CA
Posts: 175
ukemike is cool... so far.
Post

Quote:
Originally Posted by zedjr10 View Post
Whatever man. WHo are you to dictate to who how one should ask a question...
Actually he is a helpful and knowledgeable person who's has freely given information on several of your questions. He also made a suggestion that you might want to have a thread of AC related questions. He suggested the single thread approach because he's been around this site enough to know it works and it will be helpful to you and to the forum as a whole. I agree with him, it would be quite nice if you kept it in one thread.

Even if he is wrong that's no reason to be rude. Perhaps you didn't mean to be rude, but that is the way I read it.

We welcome you and your interest in your CB7 . We like to help. Keep in mind, please, that you'll get much more help from this community if you don't get angry at us when we try to help.
__________________
==========================
1991 Accord Lemons Race Car, "The Minnow" RIP
1993 Accord Lemons Race Car, "Green"
Neuspeed Race Springs, Koni Str.t "Orange", Acura CL Rear Sway Bar,
Adj Upper Control Arms -3.0deg front, -2.0 deg rear
M2A4 Trans, Cusco 1-way Limited Slip Differential, Stage 2 Clutch and 11lb flywheel.
A4 Header, 2" exhaust all the way back, catalyst delete, glasspack muffler, PT12 ECU.
Acura CL3.0 Brakes Front and Rear, Raybestos St43 Pads, Redline 600 Brake Fluid
ukemike is offline   Reply With Quote
Old 06-08-2018, 09:25 PM   #33
H311RA151N
Silver Member
 
Join Date: Jun 2012
Location: Oasis, Iowa
Posts: 2,335
H311RA151N seems to have made some friends! H311RA151N seems to have made some friends!
Lots of good info here. In case anyone wants to learn a little bit more.

https://www.epatest.com/609/manual/manual.jsp

I used it to obtain my 609. It covers quite a bit. Hope this may help some of you.
__________________

-----------------------------------------In The Tetons----------------------------------------------
Quote:
Originally Posted by gloryaccordy View Post
Holy fuck, it's the weekend man.
H311RA151N is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 01:39 AM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.