PWM cooling fan(s) control using ECM

[4wheels]

As Dave pointed out, 280 degrees F is perfectly fine for good synthetic oil. You should be able to run over 300 with good oil (not saying you want it that hot but that it isn't that uncommon). High temperatures will cause some break-down of the oil and additive package so you should change the oil more frequently when it gets that hot. That shouldn't be an issue as I would assume most heavily tracked cars change the oil after each event weekend (and take an oil sample from time to time and send it to Blackstone or some other oil analysis company).

Originally Posted by parsonsj

I'm always battling heat in my '07 Z06 (E38), especially when I run at Sebring. Oil temps often go north of 280*. I'm assuming that my fans aren't running above 35 mph. True? Can that be changed with HPTuners? I gotta admit I've never looked at that...

[Old66Tiger]

I have read this thread from front to back and I have a few questions.

What is the part number for the AC pressure sensor? Pigtail?
What is the thread size and pitch on the sensor?
Besides John Parsons, anyone else have a T made up to work on the VA system?
What is the pin out for an E38 ECM?

Thanks.

[samckitt]

Eficonnection has the connector parts.

Or go to the junk yard and fine one. You can get the connector, sensor, and fitting. Cut the aluminum hose on each side. Any AC shop can braise the fitting onto any aluminum line or fitting. Last I checked you couldn't buy the fitting the sensor connects to.

[parsonsj]

Originally Posted by 4Wheels

As Dave pointed out, 280 degrees F is perfectly fine for good synthetic oil. You should be able to run over 300 with good oil (not saying you want it that hot but that it isn't that uncommon). High temperatures will cause some break-down of the oil and additive package so you should change the oil more frequently when it gets that hot. That shouldn't be an issue as I would assume most heavily tracked cars change the oil after each event weekend (and take an oil sample from time to time and send it to Blackstone or some other oil analysis company).

Yep, I run Redline. Change it before and after every event (from motor oil to racing oil and back again). I even send in oil for analysis...

[Old66Tiger]

Originally Posted by samckitt

Eficonnection has the connector parts.

Or go to the junk yard and fine one. You can get the connector, sensor, and fitting. Cut the aluminum hose on each side. Any AC shop can braise the fitting onto any aluminum line or fitting. Last I checked you couldn't buy the fitting the sensor connects to.

Thanks. What year and models does this fall into? Or is this pretty much the same across multiple models?

[samckitt]

Originally Posted by Old66Tiger

Thanks. What year and models does this fall into? Or is this pretty much the same across multiple models?

I can't say 100%, but I pulled mine off of early 2000 front wheel drive cars. I pulled a few for friends & they all worked. I bought the connector from EFI Connection & it was the same connector as what I found in the junkyard. I assumed/hoped that it was the same sensor. I think I paid $5 a piece for the connector pigtail, sensor, & segment of hose.



I haven't done it on my AC line yet, but buddy took one of these to AC shop & they removed the fitting from the tube & then braised to an elbow that then gets crimped onto a hose.

[andrewb70]

This looks about right:

http://www.rockauto.com/catalog/more...nid=516&jpid=0

Andrew

[samckitt]

EFI Connection has the AC sensor pigtail & parts:

Pigtail:
https://www.eficonnection.com/eficon...spx?ItemId=910

Connector parts:
https://www.eficonnection.com/eficon...spx?ItemId=207

And sensor:
https://www.eficonnection.com/eficon...px?ItemId=1080

Sensor through them is $60, pigtail is $11.50.


Info on the page for the sensor states:
" We currently do not know where to source a fitting."

That's why I headed to the junk yard. I think I paid around $5 a piece for the fitting, sensor & pigtail.

[Obsin71Ls1]

You don't need to go to the junkyard to get the fitting for the A/C pressure switch; it is available from several vendors either in aluminum or steel. I don't know if I can post non-sponsor links here but if so, let me know and I'll provide the links. Also, as far as I know, GM A/C pressure sensor used in most LS cars has a fine metric thread. Specifically M10 x 1.25.

The fitting is on the right.

[samckitt]

That doesn't look like the threads on fittings for the sensors I have. The ones I have are a finer thread I believe. I will try to find one in my shed (moved & stuff is everywhere), and take a pic of it.