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> Electric AC, Installation.
914Toy
post Sep 19 2020, 07:25 PM
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My next step is to put some heat reflective film on the windows.
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Steve
post Sep 19 2020, 08:23 PM
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QUOTE(914Toy @ Sep 19 2020, 05:12 PM) *

QUOTE(ahycaramba @ Sep 19 2020, 04:09 PM) *

Can anyone tell me where to get these AC compressors? Ive been searching the web and found some in china but need to buy in bulk and not sure to trust foreign seller because of risk of getting ripped off. Does anybody have a trusted vendor anywhere that can supply these compressors? What is the best price for one of these compressors?


Steve will probably respond to your request for sourcing the compressors.

The Benling DM18A7 shows up on eBay for around $799.00
https://www.ebay.com/itm/202916972654
This is the model that we used.
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914sgofast2
post Sep 21 2020, 10:20 AM
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What kind of a controller are you using to control the speed of the electric AC compressor?
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914Toy
post Sep 21 2020, 10:39 AM
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QUOTE(914sgofast2 @ Sep 21 2020, 09:20 AM) *

What kind of a controller are you using to control the speed of the electric AC compressor?


The compressor has three rpm speeds one can select by connecting one of three wires (orange, green, and white, need to check colors:wacko:) to the evaporator signal wire. Or a three way switch is available to select speeds "on the run". I did not want one more controller, so tried the slowest wire connection and then settled on the second one after considering amp draw by the compressor and generation from the alternator. Not optimum or sophisticated but adequate for my purposes.
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914sgofast2
post Sep 21 2020, 11:06 AM
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Thanks for answering my question. I was thinking of using an electric AC compressor because I did not want to be cutting up the engine compartment and cooling tins. You have persuaded me to do so!
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VaccaRabite
post Sep 21 2020, 11:13 AM
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I am jealous of a 914 with a 170 amp alternator. Why is it only producing 66amps of power though? I'd think at 2000 RPM you would be making more power.

Did you notice any issues running all the other stuff with only 22amps remaining power? Did you do any tests like turning on the headlights, wipers etc and seeing how everything held up power wise?

I know there was a guy making 140 amp alternators for TIV motors some time ago, and Joe Sayre was running one of them to power his HID lights and big stereo/amp/second battery setup. I wonder if they still exist.

Zach
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ClayPerrine
post Sep 21 2020, 11:58 AM
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QUOTE(VaccaRabite @ Sep 21 2020, 12:13 PM) *

I am jealous of a 914 with a 170 amp alternator.
Zach


My red car as a stock 180A alternator. But it was for a 964 with lots of power accessories.

So Electric AC is in my future.

Clay
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914e
post Sep 21 2020, 12:01 PM
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QUOTE(VaccaRabite @ Sep 21 2020, 10:13 AM) *

I am jealous of a 914 with a 170 amp alternator. Why is it only producing 66amps of power though? I'd think at 2000 RPM you would be making more power.

Did you notice any issues running all the other stuff with only 22amps remaining power? Did you do any tests like turning on the headlights, wipers etc and seeing how everything held up power wise?

I know there was a guy making 140 amp alternators for TIV motors some time ago, and Joe Sayre was running one of them to power his HID lights and big stereo/amp/second battery setup. I wonder if they still exist.

Zach


66 amps might be the total load, the alternator should only be producing the required load. I don't think many have a charging system load tester around the house.
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Jonny Retrofit
post Sep 21 2020, 01:06 PM
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QUOTE(VaccaRabite @ Sep 21 2020, 06:13 PM) *

I am jealous of a 914 with a 170 amp alternator. Why is it only producing 66amps of power though? I'd think at 2000 RPM you would be making more power.

Did you notice any issues running all the other stuff with only 22amps remaining power? Did you do any tests like turning on the headlights, wipers etc and seeing how everything held up power wise?

I know there was a guy making 140 amp alternators for TIV motors some time ago, and Joe Sayre was running one of them to power his HID lights and big stereo/amp/second battery setup. I wonder if they still exist.

Zach


For a 911 engine, do not trust any alternator ‘rewind’ that claims more power in a standard casing. The windings can’t take the heat and there is no internal fan in the old casing.

I personally hold the world record for setting fire to rewound alternators in 911 fan housings. (IMG:style_emoticons/default/smile.gif)

That’s why we designed a unit based on modern internals. You can learn more here:

https://youtu.be/P9dy5wSbeHk
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Jonny Retrofit
post Sep 21 2020, 01:08 PM
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QUOTE(ClayPerrine @ Sep 21 2020, 06:58 PM) *

QUOTE(VaccaRabite @ Sep 21 2020, 12:13 PM) *

I am jealous of a 914 with a 170 amp alternator.
Zach


My red car as a stock 180A alternator. But it was for a 964 with lots of power accessories.

So Electric AC is in my future.

Clay


Curious? 964 alternator is 115/40. That’s 115A peak but only 40A at idle.
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Steve
post Sep 21 2020, 01:23 PM
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QUOTE(914Toy @ Sep 21 2020, 08:39 AM) *

QUOTE(914sgofast2 @ Sep 21 2020, 09:20 AM) *

What kind of a controller are you using to control the speed of the electric AC compressor?


The compressor has three rpm speeds one can select by connecting one of three wires (orange, green, and white, need to check colors:wacko:) to the evaporator signal wire. Or a three way switch is available to select speeds "on the run". I did not want one more controller, so tried the slowest wire connection and then settled on the second one after considering amp draw by the compressor and generation from the alternator. Not optimum or sophisticated but adequate for my purposes.

We used the 12v evaporator wire to power a relay that would connect the black wire to one of the colored wires on the compressor, to select the desired speed.
Otherwise, i plan on using a relay to power the compressor from the evaporator and using a SPDT toggle switch to manually select the Low and Medium speed from the cockpit.
See below screenshot of my notes
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Steve
post Nov 2 2020, 09:05 AM
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Duplicate ....
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Steve
post Nov 2 2020, 09:17 AM
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Three years ago, I bought the same under dash evaporator as Keith. At the time I also bought a deposit box from Morph. I relocated the drain and was able to mount it on its side in the deposit box. I’m hoping to get my electric AC working for the WCR trip. I will then report back on my installation.
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euro911
post Nov 2 2020, 02:53 PM
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Wow, that's pretty cool (no pun intended) (IMG:style_emoticons/default/rolleyes.gif)

I have one of Pete Newman's 160 amp alternators earmarked for 'HOWARD'. If the white exterior and tan interior doesn't keep the cockpit comfortable enough, I might ponder this (IMG:style_emoticons/default/idea.gif)
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Steve
post Dec 21 2020, 01:21 PM
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New Mini cooler with built in vents!! Same dimensions as the unit Keith and I are using.
https://www.southernrods.com/a-c-and-heat-c...-unit-only.html
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