 |
 |
 |
|
 |
|
03-17-2004, 03:23 AM
|
|
Senior Member
|
|
Join Date: Apr 2003
Location: Mansfield, Texas, USA
Posts: 2,462
|
|
|
Okay, is there a certain MPH these fans will kick off as if you're cruising pretty much anywhere over 40mph I'd think the airflow would be sufficient to keep the A/C condensor and Rad fine?
Do they come on at low speed initially or only full blast? If only full, is it possible to wire one to come on at a certain temp or when the A/C goes on and the other after so many more degrees?
OR could I have the PCM switch them between a Series and Parallel load going between 6 and 12v for the speeds?
Hell, I have that VSC now...should I just keep that?
Aside from that, I'd like to run my fans off the PCM as soon as I get a pin to ground them.
I know, I know lots of q's but I'd like to have them run exactly the same way that they were on my '98 Z28 I had...
__________________
The superior man is modest in his speech, but exceeds in his actions. - Confucius
"He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel
'01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
'80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL
Let's face it, the red hair... makes 'em wet.
|
|
|
 |
|
 |
|
|
|
|
|
03-17-2004, 10:11 AM
|
 |
Turbo Moderator
|
|
Join Date: Mar 2003
Location: San Marcos Texas
Posts: 3,431
|
|
Mine kick off around 40 or so MPH and turn on when slowing down to 30 or less.
They always come on low speed first. They switch between a series for low speed then parallel for high speed. This requires 3 relays and two grounds to apply the relays. My Z28 PCM has two but I think the trucks only have one control for the fans.
You could use the VSC hooked to the PCM. Then the PCM would trigger the VSC to turn on the fans for AC and preset coolant temps and the VSC will act as your relays. Also the VSC turns on one fan at a time to keep the surge down when turning on the fans.
__________________
2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
|
|
|
|
|
|
|
|
|
|
|
03-17-2004, 11:33 PM
|
|
Senior Member
|
|
Join Date: Apr 2003
Location: Mansfield, Texas, USA
Posts: 2,462
|
|
|
Does the PCM dictate when the fanz kick on and off at certain MPH?
I have no problem with the wiring and such, electrical stuff is a snap for me. So I could wire up 3 relays.
Do ya perhaps have a schemtic of that wiring?
__________________
The superior man is modest in his speech, but exceeds in his actions. - Confucius
"He who asks of life nothing but the improvement of his own nature, is less liable than anyone else to miss and waste life."- Henri Frederic Amiel
'01 Chev Z71 LT - '85 BMW 745i TURBO - '88 BMW 750iL - '88 Ford F150 XLT Lariat - '79 MB 240D - '79 MB 280S Euro
'80 MB 380SE-5.0 Euro - '85 MB 300SD - '87 MB 300SDL - 1990 MB 300SEL - '91 MB 300SE - '91 MB 560SEL
Let's face it, the red hair... makes 'em wet.
|
|
|
|
|
|
|
|
|
|
|
03-19-2004, 11:18 AM
|
|
Turbo Moderator
|
|
Join Date: Mar 2003
Location: San Marcos Texas
Posts: 3,431
|
|
|
I have a schematic of that set up. The PCM does control the fans at a given MPH. I'll get that schematic scaned in and post it.
__________________
2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
|
|
|
|
|
|
|
|
|
|
Linear Mode
