Autosport Labs

On the first engine, a 2800cc Datsun L28, supercharged & on LPG (propane/butane), MJLJ was good but not really all that noticeable. Sure did help with getting sensible ignition timing though!! Having detonated that engine, it's now on a carbied LPG L28 and works a real treat. Instant startup, sm...

If black was 12V (battery?) power wtf did they use for chassis ground??

If you're in Australia Jaycar can supply several versions to suit most needs.

Your right, the second generation Silicon Chip design does have MAP capability. I had the original design. Regardless of the MAP sensor now included, I wouldn't even consider it for a dual fuel vehicle. The dual table capability of the MJLJ with 'on-the-fly' switching which can be driven from the fu...

Didn't think it supported charts and I'm sure it doesn't allow a user to 'fiddle'.
The M$ Excel Viewer product is better even if it still means a download but again the user can't 'fiddle'.
But then I don't even use an M$ OS unless I really have to!

Might help you to know that the charting stuff for M$ Excel works fine in Open Office v2 which is available as a freeware download.

The only factors not mentioned above are physical format and connector design. The first relates to how easy is it to fit and/or mount the selected coil. The second relates to availability of cables/connectors in the location of operation. Frankly, for anyone in New Zealand or Australia use of Ford ...

What's the primary coil resistance?
If it's not at least double that of a Ford EDIS coil pack then wiring the coils in parallel is going to stress the EDIS module excessively.

I can't see how you are going to get an EDIS8 to work in this application. It's meant to fire a cylinder every 90 crankshaft degrees but your engine needs one every 180 degrees. You would have to 'fiddle' the whole timing scenario. Not withstanding that, I would set it up with an MJLJ, EDIS4 and Acc...

This one I can comment on - I built and used one of these. A reasonable design with some good ideas unfortunately crippled for high performance use by the decision to retain the distributor. After some abortive attempts to eliminate timing inaccuracies causing gasket failures (supercharged engine) t...

Looking over that map you posted, I would scrap the top 5 bin points and use them down where it matters. You're not running a Formula One engine, nor are you using fuel injection, nor are you using a carefully and precisely blended racing fuel, so a variation of 0.75 degrees just isn't going to matt...

Umm - you're right.
That would be pretty unlikely given a 1-2-4-3 firing order!
Blame the brain fade on playing with Datsuns for too long.
No further ideas come to mind.

Even if you have a 351W or 302HO cam in there it's still good. The 351W & 302HO order is 1-3-7-2-6-5-4-8 but the coilpack connections are really the same coil 1: 1 and 6 coil 2: 3 and 5 coil 3: 7 and 4 coil 4: 2 and 8 and swapping ends on coils 2 & 3 has no effect. That's also correct for 30...

Looks like the only thing you haven't tried is the coilpack which is about the only common thing to cylinder pair issues. If you don't have a spare see if you can rewire the primaries to switch the coil halves to the other cylinder pair (even with temporary patch leads). Do remember to switch the HT...

David,

You didn't happen to tidy things up for the MOT?, like securing the HT leads differently?
Just wondered because of the comment about the leads running close together and the timing light issue - any chance that you inadvertently introduced crossfire?

Art C