Autosport Labs

If one plug doesn't spark properly, the system wont be balanced and the common plug return point could reach a very dangerous voltage. Don't risk it, leave the return point grounded!

KLAS, how do these EMI suppression leads work? I've seen leads with an external braided screen for RF containment, in particular on Army radio vehicles and on old Porsches with capacitive discharge ignitions.

You should use resistor plugs or resistor leads. If neither are resistive, you will be interfering with a lot of people's radios and TVs

1mm is fine for an EDIS. Aa alternative system I installed recently recommended 1.25mm, and there's some latitude on that.

Unless Brent thinks otherwise, I would look elsewhere. The EDIS just isn't designed for this application, and fiddling with advance/retard doesn't help.

I've put some pictures up on http://rides.webshots.com/album/187745001srPbmU of my xflow installation.

No, it wont work as standard. The EDIS is only intended for use with equally spaced firing intervals. You would also have to add a 36-1 crank sensor wheel.

My coil pack didn't have any labels, so this wasn't an issue for me. All inline fours have a firing order of either 1-2-4-3 or 1-3-4-2, so one coil always connects to 1-4 and the other always connects to 2-3.

I guess it's also a matter of managing user expectation. Retarding the ignition during the occasional times that the engine starts knocking significantly can probably be achieved with a crude, empirical setup. Keeping an engine safe during extended running close to the detonation limit is a differen...

I'd second that. There is however a growing pool of knowledge in this area, some of which is seeping out of the engine manufacturers.

I recently learned from an ex Rover engineer that they never found a spot on the K series engine where a knock sensor would pick up a signal from all 4 cylinders.

There are at least two problems with soldering. Firstly, unless you have an industrial strength solvent, you will leave flux on the joint. Most types of flux will corrode the connector pins over time. Secondly the solder stops the strands of wire from flexing freely. In a high vibration environment ...

... as long as there are no one way valves in the way.

Four cylinder engines run either 1243 or 1342. A wasted spark ignition should be connected with one coil pair connected to 1 and 4, the other coil pair on 2 and 3. The outputs of each coil pair are interchangeable, so this works for either firing order.

Some spark boxes over a "rate of rpm rise" limit, which can be adjusted with switch inputs. The switches are connected to the gear stick, so that the "rate of rpm rise" changes according to which gear you are in. This is useful in race classes where traction control is banned, al...

It's on a Ford XFlow, but you may get some inspiration from http://community.webshots.com/album/187745001srPbmU