Elec Air Cond, PMS Options

[Coondog]

I have been waiting for Patrick Motor Sports to start installing this in 914s. I have reached out to them and will pass on any info given. Not a fan of the vent set up in this Patrick car but anything custom could be done in there shop.

[Steve]

Keith and I are playing around with different options all based on the Benling DM18A7 Electric compressor, aftermarket condenser, 911 condenser and off the shelf evaporators. Hopefully in a month we should be able to post something. Classic retrofit said they would sell this console evaporator separately. I am seeing the Benling electric compressor on evil bay for under $800.00. So if your a hobbyist the total solution is not that expensive if you piece mail it yourself. Do the math.... Benling compressor on the lowest setting is 40 amps + evaporator fans, condenser or oil cooler fans if your using a 911 condenser in front of your six oil cooler. A 2.7 alternator is 70 amps and a 3.2 alternator is 90 amps. With LED headlights, what else are you powering....??
This makes sense for a six conversion, for a four or water cooled power plant your better off with a standard belt driven compressor. Check out my blog for a picture of my condenser setup. The 911 condenser is about the length and height of a Mazda cooler, so you would need to modify your GT shroud to make it fit.

[Jonny Retrofit]

Keith and I are playing around with different options all based on the Benling DM18A7 Electric compressor, aftermarket condenser, 911 condenser and off the shelf evaporators. Hopefully in a month we should be able to post something. Classic retrofit said they would sell this console evaporator separately. I am seeing the Benling electric compressor on evil bay for under $800.00. So if your a hobbyist the total solution is not that expensive if you piece mail it yourself. Do the math.... Benling compressor on the lowest setting is 40 amps + evaporator fans, condenser or oil cooler fans if your using a 911 condenser in front of your six oil cooler. A 2.7 alternator is 70 amps and a 3.2 alternator is 90 amps. With LED headlights, what else are you powering....??
This makes sense for a six conversion, for a four or water cooled power plant your better off with a standard belt driven compressor. Check out my blog for a picture of my condenser setup. The 911 condenser is about the length and height of a Mazda cooler, so you would need to modify your GT shroud to make it fit.

I have been emailing with Keith.

We started ‘playing’ with these compressors five years ago. What they don’t tell you is that the current used is not just proportional to compressor speed, it is drastically affected by system pressure which of course is related to ambient temperature.

It is not the case that low speed = 40A, high speed = 90A period. It varies wildly with ambient. Also, because the alternator output drops at idle, the voltage drops and the current rises which causes what we call the ‘death spiral’, which results in compressor shut off. In the race car world where these units have been used, it has taken cars out of races due to low voltage.

It took 2 years of development and testing to devise a robust software control strategy to safely manage the power required dynamically. Our ECU is always trying to minimise the power used against the cooling required ( which it does using temperature sensors to assess demand ). The ECU drives the compressor at variable speeds to regulate the current consumption. We are still fine tuning the software and we release software updates based on user feedback (thanks to our customers and our Arizona and Florida partners).

In a nutshell, What you are paying for is our blood, sweat and tears in developing a control system that allows the compressor to ‘play nice’, not drain your battery, not roast your alternator.

Although the compressor we supply might look like others available online, it is not the same unit.

[76-914]

Keith and I are playing around with different options all based on the Benling DM18A7 Electric compressor, aftermarket condenser, 911 condenser and off the shelf evaporators. Hopefully in a month we should be able to post something. Classic retrofit said they would sell this console evaporator separately. I am seeing the Benling electric compressor on evil bay for under $800.00. So if your a hobbyist the total solution is not that expensive if you piece mail it yourself. Do the math.... Benling compressor on the lowest setting is 40 amps + evaporator fans, condenser or oil cooler fans if your using a 911 condenser in front of your six oil cooler. A 2.7 alternator is 70 amps and a 3.2 alternator is 90 amps. With LED headlights, what else are you powering....??
This makes sense for a six conversion, for a four or water cooled power plant your better off with a standard belt driven compressor. Check out my blog for a picture of my condenser setup. The 911 condenser is about the length and height of a Mazda cooler, so you would need to modify your GT shroud to make it fit.

I have been emailing with Keith.

We started ‘playing’ with these compressors five years ago. What they don’t tell you is that the current used is not just proportional to compressor speed, it is drastically affected by system pressure which of course is related to ambient temperature.

It is not the case that low speed = 40A, high speed = 90A period. It varies wildly with ambient. Also, because the alternator output drops at idle, the voltage drops and the current rises which causes what we call the ‘death spiral’, which results in compressor shut off. In the race car world where these units have been used, it has taken cars out of races due to low voltage.

It took 2 years of development and testing to devise a robust software control strategy to safely manage the power required dynamically. Our ECU is always trying to minimise the power used against the cooling required ( which it does using temperature sensors to assess demand ). The ECU drives the compressor at variable speeds to regulate the current consumption. We are still fine tuning the software and we release software updates based on user feedback (thanks to our customers and our Arizona and Florida partners).

In a nutshell, What you are paying for is our blood, sweat and tears in developing a control system that allows the compressor to ‘play nice’, not drain your battery, not roast your alternator.

Although the compressor we supply might look like others available online, it is not the same unit.

Hows does it perform @ temps above 35C? Hi Way/ City? In Southern California traffic is stop n go. More stopping than going. Same goes for Austin, Dallas and Miama (IMG:style_emoticons/default/beerchug.gif)

[Jonny Retrofit]

Hows does it perform @ temps above 35C? Hi Way/ City? In Southern California traffic is stop n go. More stopping than going. Same goes for Austin, Dallas and Miama (IMG:style_emoticons/default/beerchug.gif)

Our system does not rely on 'ram air' for the condenser. We supply 6 phase alternators with a 75A idle output so stop/go is not really an issue.

Towards the end of this video I stop the car...

https://youtu.be/735lNeSgfGs