A/C Reverse The Gases in Early Model 911's

[wwest]

Originally Posted by Bob Kontak

Ronnie did install a monstro evap blower last year. Took him a couple of weeks to craft. Not sure if the pics were before or after this addition.

Sorry, but I don't think blower speed matters all that much since the airflow remains sub-freezing, likely meaning the evaporator itself is even lower in temperature. The good effect of high speed airflow is that will tend to wick/wash any condensate not yet frozen into the cabin. But since we have no substantive way for the moisture laden airflow to exit the cabin.....

It's definitely a puzzle...

Speaking of which haven't I seen KeloGes making the same claim, system so good it produces sub-freezing vent temps? Plus haven't I seem KeloGes espousing the same refrigerant charging technique as Charlie?

Charge ONLY to the level that gets a the best sub-freezing vent temp?

[wwest]

An explanation, maybe....

Due to the hysteresis span of the thermostatic switch plus the level of liquid refrigerant remaining(system cooling "coast" time) in the R/D at clutch off time the low IR you got might be perfectly normal.

The time constant of the compressor on/off periods is fairly long, you might well measure a sub-freezing temperature, especially during the initial clutch off time ("coast" time) as long as the switch hysteresis causes the clutch circuit to remain off/open for and equal or slightly greater time with the evaporator above the freezing level.

Result, the AVERAGE evaporator core temperature over the complete system cycle time is slightly ABOVE freezing.

Hold the PR trigger on for an entire system cycle period, or even several, and then check the min/max readouts...

[Bob Kontak]

Originally Posted by wwest

The good effect of high speed airflow it that will tend to wick/wash any condensate not yet frozen into the cabin. But since we have no substantive way for the moisture laden airflow to exit the cabin.....

I am on the ragged edge of comprehension here so bear with. Not from beer but from just the dynamics of all that occurs in the system.

If the car has X units of moisture inside and eventually all freezes inside the evaporator, what is the amount that freezes it to the point of non-operation?

[KelogGes]

Originally Posted by Bob Kontak

You deserve a box of Girl Scout Thin Mints for your contribution. I am serious, bro. An entire box.

Now can somebody shut this pathetic thread down.

I swear to God, I will make it my life's work to oust you. You are an embarrassment to the thinking man.

Edit: You got nothing. You are the liar.

I have never lied here about anything

so ok you think I have got nothing

then go away

back to your beer and someplace else

[Ronnie's.930]

Will, I'm sure you are onto something about the core temp typically staying at a temperature slightly above freezing. I've never tried to determine that because the system has performed so well (nothing to trouble shoot, etc).

It would be interesting to see how much moisture is wicked into the cabin - no indication of visible moisture on the vents and such and the air inside the cabin feels crisp and fresh - the opposite of humid, in other words.

[wwest]

Originally Posted by Bob Kontak

I am on the ragged edge of comprehension here so bear with. Not from beer but from just the dynamics of all that occurs in the system.

If the car has X units of moisture inside and eventually all freezes inside the evaporator, what is the amount that freezes it to the point of non-operation?

My understanding of the process involves the coldest area of the evaporator, likely most near the inlet from the TXV, freezing the condensate first/initially, and then the process proceeds more and more rapidly as the open area of airflow declines accordingly.

The only recent example, recent being circa 1993-4, was in our 1992 Lexus LS400.

Each instance involved driving up rising terrain, McDonald pass in Mt, I5 in northern Ca. In each the instance the evaporator airflow was practically non-existent by the time we realized the cabin was becoming uncomfortably warm.

It only took a few minutes with the compressor off to return the system to normal operation.

[Ronnie's.930]

Originally Posted by Bob Kontak

You deserve a box of Girl Scout Thin Mints for your contribution. I am serious, bro. An entire box.

[wwest]

Originally Posted by Ronnie's.930

Those cookies have become such a rip-off, both levels, the girl scouts and me, that I never buy them. For the past 10 years or more I give the girl $10 and tell her to give a box to the next person that says no.

[Ronnie's.930]

^^^

But, would you buy if she came a knockin' at yer door?!?!

[zippy_gg]

Originally Posted by Ronnie's.930

^^^

But, would you buy if she came a knockin' at yer door?!?!

The perv in me says Yes!

[wwest]

Originally Posted by Ronnie's.930

^^^

But, would you buy if she came a knockin' at yer door?!?!

Only if my wife wasn't nearby....

[Bob Kontak]

Originally Posted by KelogGes

I have never lied here about anything

You called BS on Ronnie's sub freezing numbers and by default, every thing he said in that post. Yet you asked zero questions about the scenario.

From my perspective that is a shooting from the hip, for spite, lie.

Then I am degraded for my squillion post count and talking of or drinking beer.

It ain't the AC talk that frosts me.

[Bob Kontak]

Originally Posted by Ronnie's.930

I did ask her why and she said because she had no legs after riding in your car with the AC on after you drove her the long way home from the playground.

[KelogGes]

Originally Posted by Bob Kontak

You called BS on Ronnie's sub freezing numbers and by default, every thing he said in that post. Yet you asked zero questions about the scenario.

From my perspective that is a shooting from the hip, for spite, lie.

Then I am degraded for my squillion post count and talking of or drinking beer.

It ain't the AC talk that frosts me.

I stand by BS and Lie to Ronnie's so called temperatures and pressures and valid test post!

Go read "scientific laws of Thermodynamics" Laws of thermodynamics - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Laws_of_thermodynamics
Wikipedia
The four laws of thermodynamics define fundamental physical quantities ..... to Entropy: Statistical Thermodynamics Based on Information, World Scientific, New .

treaties on planet earth aplied to automotive A/C System

I am done with you go sit in the corner some place else

[KelogGes]

Back To The Topic of this Tread

Reversing The Gases Works Far better than Porsche's Engineers OEM Design

THIS IS NOT BS

My discovery works great, and I give it for free

TRY IT YOU WILL LIKE IT!!!

Believe it or don't

[wwest]

Originally Posted by KelogGes

Back To The Topic of this Tread

Reversing The Gases Works Far better than Porsche's Engineers OEM Design

THIS IS NOT BS

My discovery works great, and I give it for free

TRY IT YOU WILL LIKE IT!!!

Believe it or don't

It would be easier to believe if you could at least remember a ratio of OEM vs Reversed.

Otherwise we must trust your memory since you agreed that you kept no records.

[wwest]

Pictures came from the actual "reverse" trial?
Low side -5 PSI high side 140 PSI...

I'm in the dark completely on this one, please explain..



Guages in focus for clarity.

[wwest]

Low side minus 5 PSI = ~22 degrees below zero, yet your reading was only just barely sub-freezing...??

How so, blockage to flow between the evaporator outlet and the compressor inlet?

Oh, sub-freezing vent temperatures are still BS..??

[Ronnie's.930]

Originally Posted by KelogGes

I stand by BS and Lie to Ronnie's so called temperatures and pressures and valid test post!

I'm calling BS that you, Reid, have actually done any work on mobile a/c systems or have any real-world knowledge of the subject; your posts say otherwise, and at this point, I'm convinced that your entire body of work here, since 2011, has been a hoax.

Originally Posted by Bob Kontak

I did ask her why and she said because she had no legs after riding in your car with the AC on after you drove her the long way home from the playground.

I always keep the magnetic, Free Candy sign within arm's reach, dontcha' know!!!

[Ronnie's.930]

Originally Posted by KelogGes

Back To The Topic of this Tread

Reversing The Gases Works Far better than Porsche's Engineers OEM Design

THIS IS NOT BS

My discovery works great, and I give it for free

TRY IT YOU WILL LIKE IT!!!

Believe it or don't

Reid, you've posted this so many times now (without supporting evidence, however), that even if there is any merit to your idea, all anyone is hearing (seeing) at this point is =