Wiring for an Engine Run Stand with DJet |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Wiring for an Engine Run Stand with DJet |
doug_b_928 |
May 6 2019, 07:32 PM
Post
#1
|
Senior Member Group: Members Posts: 692 Joined: 17-January 13 From: Winnipeg Member No.: 15,382 Region Association: Canada |
I'm building an engine stand that will serve multiple purposes (transport, storage, installation/removal, and testing/break-in). The one part I have very little clue about how to do is the wiring. I've searched the forum and have seen others express an interest in having wiring info for a test stand, but it doesn't seem to be documented anywhere. So, hopefully this thread will help not only me, but also anyone else in the future who is looking to do the same.
I'm going to have the djet 'computer', manifold pressure sensor (MPS), decel valve, fuel pump, and regulator plate/relay board mounted to the stand. The ground that normally connects the battery/engine to the chassis will be grounded to the stand. The wiring for the MPS will be connected to it and the wiring for the fuel injectors, alternator, and 12 pin connector will all be connected to the regulator plate. In other words, it is as if the engine were in the car with the exception of the wiring connections at the 14 pin connector on the regulator plate. On the stand's 'dash board' I think (please correct me if I'm wrong) I need an ignition toggle switch, a momentary starter switch, an oil pressure 'idiot' light (I'm getting a cheap LED light on sale tomorrow), a tachometer (I have a cheap, generic one from FLAPS), and lever with a cable for controlling the throttle. So the question is, what is the correct way to wire these items? I have the figures from Jeff Bowlsby's webpage and the wiring diagrams. What I'm missing is the theory of what I need to do wiring-wise to make the engine run and get the feedback to the tachometer and idiot light. I'm hoping others who appear to have done this can chime in with their thoughts (paging @StratPlayer @VaccaRabite @michelko @mb911 @barefoot ) and wiring gurus (like @JeffBowlsby ). I assume I run wires from the battery to the two power pins on the 14 pin connector, so that the regulator plate has power. After that, although I think it should be pretty simple, I'm not 100% on how to wire the ignition, starter, tach and idiot light to the 14 pin connector. Please advise. |
doug_b_928 |
May 15 2019, 05:01 PM
Post
#2
|
Senior Member Group: Members Posts: 692 Joined: 17-January 13 From: Winnipeg Member No.: 15,382 Region Association: Canada |
I purchased this switch for the VCC switch and starter:
It has a light which should come on when the ignition has power. It didn't come with instructions (I guess it's so simple it shouldn't need them, but I'm a dummy). So, I watched a youtube video on installing a similar switch and the guy said that the light needs to go to ground. The light has two wires so I figured one would come from the 'out' side of the ignition switch/VCC (so it will light when the ignition is on) and the other should then go to ground. It was a short wire with a ring terminal so I cut it and added a longer wire to the engine stand ground. But, when I test for continuity, the test for the 'supply voltage' at the connector I made for the Regulator board not only shows continuity where it should, but also there is continuity to anywhere on the engine stand (i.e., to ground). I disconnected the wire on the light from the ignition switch and that solved the problem. Here's a pic of the wiring for the switch and I've disconnected the wire from the light to the ignition switch. So, long story short, what is the correct way to connect the light? |
Lo-Fi Version | Time is now: 3rd May 2024 - 12:47 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |