Autosport Labs

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

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...

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 ...

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,...

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...

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...

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...

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...

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

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

I found the engine temp sensor curve. Bruce Roe

http://www.pe-ltd.com/Downloads%5Ccoolant_temp.pdf

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 ...

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....

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

Nice to see on a BIG V8. Bruce Roe