|
|
|
|
| Author |
|
|
Registered
Join Date: Feb 2008
Location: Alberta, Canada
Posts: 455
|
What is this little Black box? 911SC
Hello Everyone,
I was wondering for quite sometime what this little black box it for? It's in the trunk compartment, under the dash board of a '82 911SC. The car had sunroof, cruse control, power mirrors. Is it part of one one of those systems???  Thanks! Gene P.S. Photo used from someone else's post, thanks for that! |
||
11-19-2011, 02:14 AM
|
|
|
*****
Join Date: Apr 2006
Location: Charleston, SC
Posts: 2,359
|
I'm guessing rev limiter. I used to know the answer but my memory is failing me right now.
|
||
|
11-19-2011, 02:54 AM
|
|
|
Exotic Vehicles are here
|
KoenigsTiger,
The "best" way to know is to unplug it and see that will stop working .... :-) LOL but, if seriously, You might need a wiring diagram .... My 2c. -Y
__________________
"Y" <- My favorite question... + '68 911 + Helping your business to get more business: http://myWWWapp.com |
||
|
11-19-2011, 05:27 AM
|
|
|
Registered
Join Date: Feb 2008
Location: Alberta, Canada
Posts: 455
|
Yeah, I should have done that... since I do have a Bentley manual....
 Thanks for the reminder 
|
||
|
11-19-2011, 05:47 AM
|
|
|
Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
Posts: 38,509
|
That doesn't look like anything I've seen in an SC. It may be a dealer installed alarm.
__________________
- Peter |
||
|
11-19-2011, 06:02 AM
|
|
|
Registered
Join Date: Mar 2006
Posts: 1,107
|
Gene,
It is the switch that turns off the fuel pump circuit when the engine speed exceeds 6700 rpm.
__________________
Paul |
||
|
11-19-2011, 06:32 AM
|
|
|
|
Registered
Join Date: Feb 2008
Location: Alberta, Canada
Posts: 455
|
Thank you Paul!
I looked in the Bentley, but there was no actual picture of the box. So I guess this is a kind of a RPM limiter. Does the CDI box some sort of a limiter also? Or is this the only one on the 911SCs? Paul thank you for the other posts regarding CIS, those have helped me out this summer... Thanks guys! |
||
|
11-19-2011, 06:41 AM
|
|
|
RETIRED
|
Euros have a limitter in the rotor....
__________________
1983/3.6, backdate to long hood 2012 ML350 3.0 Turbo Diesel |
||
|
11-19-2011, 06:48 AM
|
|
|
Registered
Join Date: Mar 2006
Posts: 1,107
|
Gene,
No ignition limiter. The reason is that if you continue to dump fuel through the CIS sprinkler system at 6700 rpm with no fire, the converter life goes out the window.
__________________
Paul |
||
|
11-19-2011, 06:54 AM
|
|
|
Registered
Join Date: Feb 2008
Location: Alberta, Canada
Posts: 455
|
Hmmm, good to know!!! Thank you for the info gents!
|
||
|
11-19-2011, 07:02 AM
|
|
|
Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,489
|
they can have a wierd failure mode, where they momentarily shut off the pump. repeatedly. they can be unplugged with no performance issues, other than no over-rev protection.
__________________
https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
||
|
11-19-2011, 08:11 AM
|
|
|
Registered
Join Date: May 2008
Posts: 2,948
|
Quote:
__________________
Keep the Shiny Side UP! Pete Z. |
||
|
11-19-2011, 11:02 AM
|
|
Porsche 911 - then
Porsche 911 - now
Da cab
