Search found 95 matches

by BRUCEROE
Wed Mar 31, 2010 11:25 am
Forum: Powered by Megajolt Gallery
Topic: Holden Gemini Van - with Nixie Tacho
Replies: 24
Views: 53916

Holden Gemini Van - with Nixie Tacho

The other retro display is the 7 segment incandecent. They can have a tint similar to nixies, but run on 5V. Have used a few here. Bruce Roe
by BRUCEROE
Mon Mar 29, 2010 11:15 pm
Forum: Operation
Topic: Setup Issues
Replies: 16
Views: 9500

MINI

My first question would be, do you have the plugs connected to the right coils & drivers? With a waste fire don't pull a plug wire. Try shorting each plug, and see if some have much less effect. You could also use the timing light on each plug, and see if the mark moves around to the corresponding c...
by BRUCEROE
Mon Mar 29, 2010 10:55 pm
Forum: Powered by Megajolt Gallery
Topic: Holden Gemini Van - with Nixie Tacho
Replies: 24
Views: 53916

Yes my + or - advance knob does shift the entire map. But turning it back restores everything, since the map wasn't changed. The idea is to find areas needing adjustment, then go back & update them later. Seems like, when I try adjusting one map point, the engine immediately slides off that spot to ...
by BRUCEROE
Mon Mar 29, 2010 2:04 am
Forum: Powered by Megajolt Gallery
Topic: Holden Gemini Van - with Nixie Tacho
Replies: 24
Views: 53916

Holden Gemini Van - with Nixie Tacho

The Nixie tube tach is cool. I built one in 1969 when Fairchild came out with a decade counter/latch/decoder chip set. The problem is high voltage for the tubes. I generated an audio frequency 180 volt pulse, which the eye sees as continuous. A pulse width modulation ckt gave me variable brightness,...
by BRUCEROE
Thu Mar 25, 2010 4:57 am
Forum: Operation
Topic: Tuning Aid
Replies: 0
Views: 1513

Tuning Aid

Just started trying to map out my 20 hp odd fire twin. I have a small filter chamber to help smooth out manifold vacuum ripples, but I think a larger one may be better. First approach here is to optimize no load advance, looking for maximum vacuum /rpm at a given throttle setting. I will probably ne...
by BRUCEROE
Wed Mar 17, 2010 6:23 am
Forum: Q&A
Topic: Anyone mapped a temp sensor?
Replies: 3
Views: 5515

Anyone mapped a temp sensor?

There is a very common & cheap 2 wire temp sensor used for EFI in all kinds of liquid cooled engines. It came with my EDIS parts. I'm attaching the resistance chart (degrees C). If you use it in MJLJ setup, it will be powered by 5V through 2.2K ohms. I have a file from my unit which translates Aux i...
by BRUCEROE
Tue Mar 16, 2010 5:23 am
Forum: Installation
Topic: Coil pack favour
Replies: 5
Views: 6029

Coil pack favour

I was working on wiring my engine, and noted the coil pack connector has 3 pins. Power to the middle pin, and one pin on each side to each coil primary. Didn't see in the literature, which pin drives which coil. Did a little lab test, and sho 'nouf, the left pin drives the left coil; the right pin d...
by BRUCEROE
Sun Mar 14, 2010 8:49 pm
Forum: Q&A
Topic: I am thinking again (Fan Control content)
Replies: 5
Views: 3650

I noted that the air conditioning condenser gets no airflow when sitting still & engine not overheating. So a sensor runs the 2 fans slowly wired in series anytime the condenser gets hot. If the engine temp gets above the point where thermostat is all the way open, they also run in series. Hot engin...
by BRUCEROE
Sun Mar 14, 2010 8:36 pm
Forum: Installation
Topic: Capacitor/condensor mounted on the coilpack
Replies: 6
Views: 4973

That capacitor measured 0.25 ufd here. Probably a good quality cap, able to survive & help suppress some of the spikes in a vehicle system. Like microsecond 300V spikes from the starter. I'd say, its "good engineering practice" to keep it; Ford thought it was worth the cost. Bruce Roe
by BRUCEROE
Thu Mar 11, 2010 2:59 am
Forum: Installation
Topic: MegaJolt power wiring
Replies: 11
Views: 7196

Wiring

Fuses have some voltage drop, esp as they get older. And they add some unreliability to a critical circuit. I prefer to use fuseable links in engine stuff, like the OEM does. A pretty light link would handle this load. Bruce Roe
by BRUCEROE
Tue Mar 09, 2010 8:43 pm
Forum: Q&A
Topic: ODD FIRE KOHLER
Replies: 4
Views: 3147

engine temp sensor curve

I found the engine temp sensor curve. Bruce Roe

http://www.pe-ltd.com/Downloads%5Ccoolant_temp.pdf
by BRUCEROE
Tue Mar 09, 2010 5:06 pm
Forum: Q&A
Topic: ODD FIRE KOHLER
Replies: 4
Views: 3147

Brent Picasso , The Kohler will use driver 1 & 4 to line up with my firing order. One coil pack, with the 2 extra outputs shorted should all the energy to the 2 active plugs. The other coil drivers not connected. I'm currently running everything on the bench with my trigger wheel emulator (a couple ...
by BRUCEROE
Tue Mar 09, 2010 6:02 am
Forum: Operation
Topic: MJLJ-V4 Temp Gauge
Replies: 1
Views: 1694

MJLJ-V4 Temp Gauge

I am still stumbling along, trying to figure out the ENGINE TEMP feature. First thing is, apparently it needs to be CREATED under the TOOLS section, not just called in the VIEW section. There are ACD VALUE and VOLTAGE columns; I think ACD is the digital value for the AUX input voltage under VOLTAGE....
by BRUCEROE
Sun Mar 07, 2010 4:21 pm
Forum: New Project Suggestions
Topic: EDIS Heat Sink
Replies: 2
Views: 8469

EDIS Heat Sink

OK then, just the coil packs mount on the engine. I will need to find new plug ends for coil wires, no clearance for those long ones. thanks, Bruce Roe
by BRUCEROE
Sun Mar 07, 2010 4:35 am
Forum: Powered by Megajolt Gallery
Topic: another MJLJ success... Jensen Interceptor
Replies: 7
Views: 10410

another MJLJ success... Jensen Interceptor

Nice to see on a BIG V8. Bruce Roe