Wwest. The high side pressure did not rise post shut off. Here we are again. Post the damn video.

If you don't believe Kuehl, your MAC "GOD" then who do you believe...?

Post the video. I hooked up the gauges myself. Ran on high. Sable pressures. Turned off car. High side did not rise. You keep talking about a phenomena that doesn't exist anyplace but your mind.

I agree with Keuhl because I did the test myself not because he is a GOD. this has nothing to do with kuehl. High pressures don't rise post shut down. If you are so convinced, buy a set of gauges, video the test, and post the proof.

"...unsubstantiatted BS...."

Not wrong, ONLY "unsubstantiated"...I'll accept that as progress.

Post the video Wwest.

Towards what end? What are we progressing towards?

Twice, each with multiple test series, sequences, I have shown that the rear lid condenser fin/vane temperature rises post engine shutoff, 120F - 150F IIRC. According to the P/T chart, widely published and accepted as a "standard", even by Kuehl himself, the pressure inside the "vessel" must rise with temperature in accordance with the chart.

The only question left to answer is "how high?".

With an R-134a charge and a standard R-134a binary pressure switch one can see beginning, just prior to ignition off, high side pressures might well be as high as 398 PSI. That's almost 50 PSI above the "trigger" point for many HPRV's in use during the period of interest.

So our starting point is 398 PSI.

Now, how much liquid refrigerant might there be remaining within the R/D volume...?

If we wait for the compressor to cycle off just prior to switching the ignition off then that volume should be "full", should it not...??

So, last, the TXV....

Let's suppose the vent temperatures were within range of the evaporator having to be near the point of freezing any condensate, a common "picture" we see here in these forums. So the TXV would only be metering enough refrigerant to sustain the evaporator core at that level.

Now we switch off the ignition, the evaporator blower stops, as does the cooling airflow for all condensers. And the engine compartment temperature might well rise to 70C...

In that case why would the high side pressiure NOT rise substantially ABOVE 398 PSI...??

And then ask yourself: "what about a compressor that only cycles off due to a thermostatic switch, no limit to high side pressure...??"

And what about if someone has pulled the capillary tube slightly out of the evaporator holder thinking to get lower vent temperatures...?

"..worse that can happen..?? For a naysayer the worse would be verification of the proposed solution. Can't let that happen...MUST prevent....

Post the video wwest. You are forgetting many factors.

where does this number come from in laymans terms?

Post the video. It will prove or disprove. What are you so afraid of?

Will,

Are you aware of everything you have proposed?

I have said several times the fan and safety switches are ok in my book.

Why was it necessary to "propose" not buying aftermarket front condensers?

A 30 second video will make your last 500 post pointless. Why not?

Binary Switch w/ R-134a Discharge Port 7/16" - A/C Pressure Switch

398 PSI, while seemingly common for modern R-134a designs, is a bit high for our "legacy" A/C systems so:


Trinary II™ Switch Freightliner OEM# RD 5-4585-0

Yes. In that case I am quite certain that the buyer would be wasting money.

Have you seen the contents/COST of the "kit" Griffiths wishes to sell for a simple R-134a conversion..???

Why do you care what Griffiths does. Post the video!!!!!!!!! All the noise is pointless.

OK - I understand the 398. Thx

Now, I must of missed this test:

Twice, each with multiple test series, sequences, I have shown that the rear lid condenser fin/vane temperature rises post engine shutoff, 120F - 150F IIRC.

Are you saying the above sentence / test negates the need for a "video"?

I don't know the answer, but it may save three hundred posts before it's asked again if this is your basis for not addressing the video request.

Q: how much is it worth?

A: whatever the market will bear.

It's called economics.

Maybe you could get everything Charlie sells for less if you bought all the components indicidually. I don't know that to be true, but let's say that it is. If I choose to go to Charlie because he's a one stop shop for everything I need, well then I'm paying for convenience. It happens every freaking day in this world. Guess what, Mac laptops are always more expensive. If you don't like it, you don't have to buy one. But Apple sure does sell a lot of them.

And if a viable competitor came on the scene that gave Charlie, or Zims or anyone else for that matter, then you would see prices drop.

If you believe so strongly that Charlie charges too much for not enough value, then get off your retired butt and give him a run for his money and quite annoying everyone with your little jihad.

But you just tilting at those windmills ok, Don Quixote. Because you've obviously accomplished so much blathering on here.

Temp increase does not = a linear increase in pressure because there are other factors. Like the 40 feet of hose that equalize the pressure increase. When I did the test I don't doubt that temps on the condenser rose... But pressure didn't rise.
If wwest is so convinced there is no reason to not prove it with a video. Except he is afraid he might be wrong...