E30 S54 Swap AC signal input to DME

[R3Z3N]

Sounds like the A/C signals to the E30 DME are not routed the the C101. I'm looking at a diagram that shows DME pins 40 & 41 going through C136. Those are the A/C signaling wires that will need to connect to the CAN interface.

It also appears that the E30 doesn't use a relay to drive the A/C compressor clutch. That will need to be added. I'll either point people to a good source or keep them on hand to sell along with the CAN interface.

Either way, if you build it, I WILL buy. I will be running the E46 M3 ECU as this is for an S54 in the e30 chassis. Using Andrews wiring harness:

http://www.r3vlimited.com/board/showthread.php?t=275468

[gpeterson]

Circuit boards have been designed & ordered. I should receive them in about 2 weeks.

[8920vt]

I am running the factory e30 aux electrical fan for the AC and a viscous mechanical fan for the engine.

I have a factory chipped MS54 ECU on my e30 swap. E36 compressor with factory e30 wiring for AC.

The idle bog with AC on drives me nuts and sometimes stalls the car in heavy traffic in hot weather.

If you recommend running various e46 components, i will get them and install them. I have no issue trying to improve/optimize my AC setup.

Please let me know what you recommend and when your components are available.

Thank you.

[gpeterson]

I am running the factory e30 aux electrical fan for the AC and a viscous mechanical fan for the engine.

I have a factory chipped MS54 ECU on my e30 swap. E36 compressor with factory e30 wiring for AC.

The idle bog with AC on drives me nuts and sometimes stalls the car in heavy traffic in hot weather.

If you recommend running various e46 components, i will get them and install them. I have no issue trying to improve/optimize my AC setup.

Please let me know what you recommend and when your components are available.

Thank you.

No need to change your existing hardware, just wire a relay to MSS54 X60004 pin 29 that will drive the A/C compressor + install & wire CAN board. I'm hoping the first batch will be ready in 2 weeks. I'll be providing detailed instructions for E30 and E36 applications.

[gpeterson]

BTW - the current board design has the following i/o capabilities:

Input
-2x digital 12v for E30 A/C inputs or E36 A/C input (only one used)
-1x digital gnd for E36 A/C input
-1x analog for E46 A/C pressure sensor (not required but useful if running E46 PWM aux fan)

Output
-3x digital, can be used for any combination of lights for check engine/cruise/EML/oil level warning, driving a relay for additional single speed aux fan, or ?

I can customize the firmware depending on your installation. My E36 install is using the E36 A/C inputs & E46 A/C pressure sensor plus outputs for CEL and running a SPAL puller fan (on at 210 degrees, off at 200). I can provide firmware updates via email and they can be applied to the board by connecting via USB.

[R3Z3N]

Wow! Looking forward to one!

[gpeterson]

For anyone interested - I'll also flash your MSS54 for to make it work with your swap. $100, return shipping via USPS Priority Mail is included. I can also do it remotely if you have a vagcom or k/dcan cable. I don't do any tuning, just swap flashing.

Mine is running perfectly in an E36 and the E30 isn't much different. Each flash is customized depending on what equipment you want to keep in place - anything from retaining all emissions components to a fully stripped track car.

[carlb]

In like Flynn. Ready to order when you're ready...

[iliad]

For anyone interested - I'll also flash your MSS54 for to make it work with your swap. $100, return shipping via USPS Priority Mail is included. I can also do it remotely if you have a vagcom or k/dcan cable. I don't do any tuning, just swap flashing.

Mine is running perfectly in an E36 and the E30 isn't much different. Each flash is customized depending on what equipment you want to keep in place - anything from retaining all emissions components to a fully stripped track car.

That is a steal of a deal.

I'm ready to buy one of your modules whenever they are ready.
Ac signal and cel plus maybe the oil level sensor as well.

[gpeterson]

That is a steal of a deal.

I'm ready to buy one of your modules whenever they are ready.
Ac signal and cel plus maybe the oil level sensor as well.

To clarify - swap flash is $100, CAN module will be $250. I hope to be shipping them next week.

[R3Z3N]

Woot, totally acceptable!

[iliad]

To clarify - swap flash is $100, CAN module will be $250. I hope to be shipping them next week.

Yes I'm talking about the flash.

250 for the module sounds acceptable.
Let me know when it's ready to ship, I'm ready to buy.

Will it come with wiring instructions?

[Staszek]

Im in when you are ready as well!

[gpeterson]

Looks like I'm on track to ship 3 of them next week. I'll be writing up detailed installation instructions.

[gpeterson]

The first batch of PCBs arrived today and other components should be here tomorrow. I'll get them assembled and start testing soon.