Search found 20 matches

by pete_89t2
Mon Oct 12, 2020 3:52 am
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 1764

Re: AC restoration questions, '93 Mazda RX7

Barrier hose will be a snug fit, but it should be anyway. A little lubrication is a good plan for sliding them on. If you can't find a loose ferrule with the correct dimensions, you can use clamps. We have covered this before: https://www.autoacforum.com/messageview.cfm?catid=2&threadid=13152 h...
by pete_89t2
Sun Oct 11, 2020 4:18 pm
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 1764

Re: AC restoration questions, '93 Mazda RX7

I don't recall if your RX7 has a thermostatic sensing bulb in the evaporator to control icing. If it does, then you can set the low pressure switch down around 20 to 25 psi, because the evaporator control will prevent icing. Thanks, it does have a normally closed thermal switch mounted on the evapo...
by pete_89t2
Sat Oct 10, 2020 4:01 am
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 1764

Re: AC restoration questions, '93 Mazda RX7

Yes. you should add a high pressure cutout to the clutch circuit. Blowing the relief valve is something to avoid, and the switch does that. Since you are plumbing fresh anyway, it is not a big job. Supercool has always been good product Here is a PAG test I did years ago... https://www.autoacforum....
by pete_89t2
Thu Oct 08, 2020 4:57 am
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 1764

Re: AC restoration questions, '93 Mazda RX7

Wow, I'm surprised my lube selection comment would result in that much discussion - reminds me of what ensues on the Mazda rotary forums when a newbie asks if they should use a synthetic or conventional motor oil in their rotary :lol: Anyway, the oil that I used was purchased at a local Advance auto...
by pete_89t2
Sat Oct 03, 2020 4:23 pm
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 1764

Re: AC restoration questions, '93 Mazda RX7

If you are putting in a huge intercooler, you will need to be sure that the condenser airflow is not compromised. It's a pretty big IC, but it's mounted in a stock like location (i.e., behind the radiator & condenser, which both lean forward at about 40*) So the radiator & condenser get the...
by pete_89t2
Sat Oct 03, 2020 4:07 pm
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 1764

Re: AC restoration questions, '93 Mazda RX7

What concerns me the most is the oil you used. The slightly smaller TV12 compressors used in R-134A applications came with a ND oil 9 factory fill, that is, double end capped PAG 100, double the viscosity at 212F than Ester 100 (the viscosity you likely used, since that's the most common for auto a...
by pete_89t2
Fri Oct 02, 2020 5:37 pm
Forum: Automotive Air Conditioning Forum
Topic: AC restoration questions, '93 Mazda RX7
Replies: 22
Views: 1764

AC restoration questions, '93 Mazda RX7

My '93 RX7 resto-mod project has finally reached the point where I can focus my attention on restoring the A/C system. When I got it almost a year ago it had no A/C components on the engine bay side of the firewall. Fortunately all the HVAC electrical controls, HVAC wiring and interior blower/air ha...
by pete_89t2
Wed Nov 13, 2019 6:58 am
Forum: Automotive Air Conditioning Forum
Topic: Selecting a condenser for a custom AC installation in a '93 Mazda RX7
Replies: 3
Views: 3660

Re: Selecting a condenser for a custom AC installation in a '93 Mazda RX7

Proper cooling in general. 14 x 24 PF condenser is needed. Exp valve reads temp at the probe. R12 or R134a. Thanks! Being a bit of an AC noob, with regards to the condenser, should I be selecting based on a minimum surface area? So at the recommended 14 x 24 size = 336 square inches, would a differ...
by pete_89t2
Tue Nov 12, 2019 10:25 am
Forum: Automotive Air Conditioning Forum
Topic: Selecting a condenser for a custom AC installation in a '93 Mazda RX7
Replies: 3
Views: 3660

Selecting a condenser for a custom AC installation in a '93 Mazda RX7

Greetings, I'm about to acquire a modified '93 Mazda RX7 project car that I'd like to restore functional AC to, and can use some advice. As it sits right now, everything AC wise on the interior side of the firewall (e.g., evaporator core, expansion valve and HVAC blower/air handler unit & HVAC c...
by pete_89t2
Sun Jun 03, 2018 9:19 am
Forum: Automotive Air Conditioning Forum
Topic: Compressor/mag clutch noise - death rattle sound?
Replies: 7
Views: 3326

Re: Compressor/mag clutch noise - death rattle sound?

Thanks for the de-slugging gadget link. Just pulled the belt and hand checked the compressor & mag clutch. When de-energized, the pulley spins smooth & easy with no noises. Energized the clutch with a jumper to +12V and the compressor turns with the normal resistance you would expect as it c...

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