|
Indeed both of these things have been covered. I think retro air was the first to come up with and offer the higher cfm blower motor: Porsche 911 Air Conditioning
|
Indubitably correct! And a fine product too.
However the Kuehl Hurricane blower motor has been tested and shown to put out more air and is simpler to install: and our host offers it here on this site: |
Increasing Production
Sorry I have been too busy filling orders to have much time to post here lately
http://forums.pelicanparts.com/uploa...1313627427.jpg |
Quote:
L. vent/L-ctr/R-ctr/R. vent Factory config. 10.7/8.6/8.5/10.8 Passenger side carpets and footboard removed. 13.2/8.2/8.7/10.9 Plastic duct, resistor pack, removed. 14.8/10.8/12.5/11.5 With cubby cover open, plastic duct removed, and bonnet open the system takes in fresh air along with cabin/recirc. |
Does a keuhl motor in a backdated evaporator top provide substantially more airflow than the standard '87 blower motor?
|
That seems to be a significant increase in airflow... I've often wondered if you could put a grille on the passenger toe board that would give a direct flow from the cabin into the evaporator box? I know from my construction days that you have to have equal CFM (make-up air) in to get CFM out.
It seems to me that when you're looking at a sub-standard A/C system like ours you want to tweak every possibility. |
Has anyone installed one of these yet? If so...give us a report!
|
Quote:
both the earlier version (1970-1985) and later version (1986-1986) blower boxes and motors. You can read about the comparison <a href="http://www.griffiths.com/porsche/ac/911ac/evapmotortest/911evapmotortest.html"><font size="+1">HERE</font></a> Porsche 911 evaporator blower motor tests, Porsche 930 evaporator blower motor tests, Kuehl Wirbelsturm Hurricane Evaporator Blower Motor, 901-624-901-00,911-624-899-00 |
Quote:
Bench testing, as you did, may well turn out to be meaningless when the blower is installed in the actual work environment. You need to re-test in the same method I did before answering "YES". |
Quote:
Apples and oranges. Your off topic. Your post attempted to address whether there was an increase in air flow if things were or were not in front of the RH side air intake. The post you are addressing discusses the differences between the 2 versions of the OEM blower top and the Kuehl blower motor asked by "llangston1". However, going back to your topic, we'd be interested in seeing what you mean in terms of the nomenclature you have noted with respect to the numbers "10.7/8.6/8.5/10.8" do you mean MPH, km/hr, knots, m/sec, fpm, Beaaort force or an estimated cfm? And, to answer your question, "yes" we ran tests on the theory of articles blocking the RH side air inlet some time ago... 'minimal' affect. Griff |
Has anyone purchased one of these condensers and tested in their car?
I live in Central TX with 100 deg+ days most of the summer. I have actually rigged up my manifold guages, so I can read Hi/low side pressures while driving on the interstate @ 70MPH (engine lid down / windows closed, of course). On 100 deg days my system cools fine and engine temp is normal, but high side pressures are 375psi plus (running 134a with factory tube/fin condenser). I'd sure like to get my high side pressures down, and KellogGes' parallel flow condenser should theoretically do that.
Lots of good info here, but sure would like to hear about a real in car test from one of KellogGes' actual customers. |
Quote:
|
Quote:
At 95 F ambient temp here in Fort Lauderdale's tropics I get normal high side pressures i.e. 175-225 max psi; or lower then 175 but I am also running front and rear condensers too. You might need more then just a condenser change? What is your low side psi when you are getting 375 high side psi @100F and same speed? When was the last time you changed your a/c filter/dryer? |
Love the discussion BUT all of us are waiting to hear a report from any Pelican on if the dang condensers work...calling all birds :=)
|
Quote:
Bueller? Bueller? Bueller? |
Quote:
Pelican Parts - Product Information: 911-624-899-00-M207 |
Quote:
It matters not, the relative ratio is the point. "...minimal affect..." According to the numbers, readings, I got that's just not possible. Bench test in "free"air flow cannot equate to the level of restriction in actual use. |
In response to KellogGes' reply,
Drier is new, expansion valve is new also. I evacuated and recharged my system earlier this year, thinking I had a restriction; replaced the drier and TXV at that time (they're cheap). No restrictions elsewhere and overall system performance after recharge is the same as before (meaning I can maintain a 70deg cabin on a 100+deg day). Low side is around 30, when high side hits 375 (which still sounds like a restriction. When it's cooler outside (say 90deg in the morning), high side pressure is 225-250 and if I hit either the front or rear condenser with spray from a water hose, high side pressure drops quite a bit, which leads me back to my assumption that your fancy new condenser can pull a lot more heat out of my refrigerant than the old style tube/fin I'm running, and hence drop my compressor head pressure. I should also note my compressor is a rotary vane style, which I believe produce more pressure than swash plate's or scroll's |
Quote:
And attempted to eliminate potential problems because your high side was so high I guess because you only have a rear condenser that is not very efficient it could/might explain this Still I am surprise your high side is 375F ouch ; but if your rear condenser is a very old Behr OEM, and if this is the case They were not sealed to the deck lid hole air intake, taking good use of the engine fan, and this permitted incoming air to not only go through the condenser poorly But also around the condenser before the air hit the condenser and proceed around (not through) the condenser into the engine fan shroud intake which creates a loss in condenser efficiency; furthermore you do not have a front condenser that most/ later i.e. 1974-1989 year 911’s with separate front fan. FYI when I replaced my OEM front and rear condensers to PFCs there was a huge drop in my high side pressure; Along with colder air temps Let me know when you want the PFC’s |
I have a front condenser, which is also original Behr tube/fin, as well as the Behr rear condenser. I sealed my engine deck lid to make sure the engine fan only sucks air through the rear condenser. Front condenser has no fan and is mounted in the front wheelwell (where the factory oil cooler usually goes). I get plenty of air flow over both condensers (when driving); not so much at a standstill, but the cabin still stays cool at redlights.
To be fair, the 375 psi high side pressure was read @ 3100 Engine RPM (about 2700 compressor RPM. on a 100+ deg F day. It is lower at idle RPM, but I can't remember by how much.... I have a high/low pressure cutout switch in my high side line that will cut out above 385psi or below 40psi. So far, it has never cutout on high side pressure. If you look at a 134a charging table, my high side pressure is on the high side of the normal range for the given ambient temp, so it's not grossly out of whack, but |
| All times are GMT -8. The time now is 05:58 PM. |
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website