R12 A/C regassing

[Mos]

Z2TT - I gathered something like that but I was wondering a bit more specifically - for instance on a current prado the condensor is probably twice the size of an MX83 one, whereas the IS200 condensor is probably only 10% larger than the MX83. I have a bunch of condensors but I haven't pulled them out to compare. Another difference is that MX83/AE86/ST185 are series flow (ie several tubes looped around, multiple pass) whereas the IS200 core is parallel flow (ie many channels, single pass, receiver dryer built into one of the tanks) - but I have no idea how, or if, that affects efficiency.

I still think the main reason is inadequate airflow, rather than actual core size, as energy transfer efficiency is related to both, and the absence of one can't really be made up by the other.

You would need to use the A/C compressor clutch wire to turn on the fans.

Mos.

[CrUZida]

The current Prado aircon is not phenomenal either, which is surprising given the size of the condensor.
The current Land Cruiser however is scary cold. I've had to turn the heat up a coupe of notches on 45deg days the aircon gets that cold.

[cambelt]

The new paralell type condensors are much more efficient than the older serpintine ones mainly due to there close FPI ,very thin cores .
Dave

[The Witzl]

i'd just like to add my experience converting from R12 to R134a.

I just installed an aircon system into my AE82 twincam. I didnt realise it at the time, but the system i was installing was an R12 system (the car didnt have aircon before).

I took it to my friendly aircon dude, and he told me it would have to be converted.

Total cost = $220
- new dryer-
- couple of new fittings to match R134
- vacuum test
- new oil in compressor
- flouro dye added
- one new o-ring (one of the fittings was leaky)
- fill with R134a gas

* was done yesterday.

The system is ICE COLD - i love it!

However, when driving it home yesterday the engine does run a bit hot, and the compressor kicked off a couple of times. The system turns on the thermofan constantly when aircon is running - however it has just the one thermofan (the normal thermofan).

It seems that later model AE82 corollas had a second thermofan fitted in front of the condensor, and it seems there is wiring provisions for this 2nd fan. I noticed this when pinching parts at the wreckers on the weekend.

I'll be grabbing that 2nd thermofan and fitting that also, and will be studying how the later model AE82's run the two thermos.

[CrUZida]

I just spoke to my aircon bloke about HR12. He said its just one of many replacement gases that has come and gone over the years, and honestly doesn't expect it to last. Which means when it stops working you are going to have to convert to R134A anyway (assuming R134A is still in operation).

[Admiral coFF33]

I just spoke to my aircon bloke about HR12. He said its just one of many replacement gases that has come and gone over the years, and honestly doesn't expect it to last. Which means when it stops working you are going to have to convert to R134A anyway (assuming R134A is still in operation).

You aircon bloke just wants your money andrew $$$$$$$$$$$$$$$$


HR12 is still being produced on a mass scale all around the world and wont "go away" as its a cheaper alternative to R12,
$230 + for R134a conversion or $150 for HR12 regassing....

people just dont research shit, and get screwed on the R134a

oh well
you either know or your dont know

[The Witzl]

Coffee,

I drove in with an un-gassed R12 system... and drove out with a fully gassed R134a system for the $220 price.

Your pricing is incorrect.

[CrUZida]

HR12 is still being produced on a mass scale all around the world and wont "go away" as its a cheaper alternative to R12,

Thats a pretty bold statement for someone who is not in the industry.

Remember, what the 'world' is doing has NOTHING to do with Australia. We tend to make our own rules, especially when it comes to hydrocarbon based products. Just because its used worldwide doesn't mean the Australian Govt will keep allowing it to be used in the future.

But, time will tell. If its still being used in 3 years time, feel free to laugh at me. If its no longer be used, prepare to be lol'd at

[Admiral coFF33]

[Talasas]

Good thread, keep the experience coming, I'm currently planning on reinstalling the AC setup on the AE93 and I've got a spare compressor sitting here.

Anyone know if it's worth getting it setup for R134a now since it's easier to dismante? I've taken an AC comp apart before and there's a lot of oil in there, how do they ditch the R12 oil for the R134a oil?

[The Witzl]

Talasasas - im pretty sure that the AE93 should already be R134a.... both of my SX seca's were.

If you do need to convert, its probably easier for the A/C dude to convert an already installed system. All they do is replace the dryer, and replace a couple of fittings to match with the R134a filling system (so that it cant be filled with R12, which uses different fittings).

The compressor oil - got no idea. I wouldnt be overly concerned though... leave all that up to your aircon guy. Just install the system, drive to aircon guy, and ask for gas.
Pay monies, drive out in the coolness of A/C.

P.S. Aircon rocks.

[Dale]

$220 is cheap! I got charged a tad over $300 when I got mine converted last year... everywhere I got quotes from were around the same price

[The Witzl]

B & J Auto Electrical... Rydalmere.
I've had 3 different cars done there now... good workshop.

[love ke70]

cant you use things like LPG, and other various gasses, only its not highly regarded, it just works really bloody well?
i know ive read something of it on a few forums, might have to do some digging if no one knows?

[hemi twofifteen turbo]

yeah a friend of mine who is an autoelec always goes on about the 'dodgy workshop around the corner' using LPG. He said it was legal and works well, but the traffic accident factor is a bit scary. How much gas is in a fully charged system?