Official LH2.4 EZK Wasted Spark Conversion - Installation Instructions

[thismachine13]

Nothing to add specifically to your post but with regards to plugs, I'm going to use the Denso TT plugs. If I understand it correctly the ground electrode sees the "wear" on the exhaust stroke in wasted spark application.

Figure I will want longer wearing electrodes on both ends.

[bobxyz]

Originally Posted by lookforjoe

Curious about this - as I just put in WR7DP's about 80 miles ago & now have a 'breakup' that occurs during a steady throttle increase run - I was just trying to figure out what variables could cause the breakup, and forgot that I had put these in. I'll switch them back out for WR7DC's to rule out the plug, but I'm curious if anyone has specific notes plug types that induce erratic behavior?

When I said "Platinum plugs have a shortened center-to-outer electrode path such that the spark is always on the platinum", I really should have explained it as a sharpened center tip and (sometimes) a protruding disk on the outer electrode. And, I was only commenting on wasted spark requirements. There's a whole different set of concerns for high boost/racing, and I'm way out of my comfort zone here. The amount of bad internet info on this is huge. As a reasonable start, try:
http://www.hotrod.com/articles/spark-plug-guide/

[lookforjoe]

Originally Posted by lookforjoe

Curious about this - as I just put in WR7DP's about 80 miles ago & now have a 'breakup' that occurs during a steady throttle increase run - I was just trying to figure out what variables could cause the breakup, and forgot that I had put these in. I'll switch them back out for WR7DC's to rule out the plug, but I'm curious if anyone has specific notes plug types that induce erratic behavior?

Confirmed that WR7DP's DO NOT play nicely with the WS/EZK116 setup. Breakup is gone with the WR7DC+'s installed.

[thismachine13]

'89 245 N/A with Buchka board, LS2 coils, Yoshi daughter board with Turbtankshane chip for correct dwell. Got it all wired up and it will finally start but is missing. I've confirmed that my wiring coming out of the coils is correct.

When I turn the key to position II I can hear the pump prime and a couple of times the engine will jump as of a coil is firing before the car is started.

Any suggestions?

[thismachine13]

Seems 1 & 4 are firing but 2 & 3.....not so much.

[thismachine13]

Sent photos of my setup to Karl and Chris. I was using pins 24 and 25 on the EZK for the two outgoing logic wires. 24 seems to be ok but 25 is no bueno. After re-reading this thread it looks like pins 14 and 15 are safe so I've soldered outgoing on those pins. We'll see if that works tomorrow morning.

[thismachine13]

All sorted and it runs great. Now to gut a relay and get the tach working.

[Duder]

Great to hear you got it sorted out...I'm glad we could help!
Go out and enjoy it.

I still have to get my tach sorted out too - I'm procrastinating on that.
There's an original spark output wire from the EZK that "might" work to drive the tach even without a relay.
I'll report back if that works.

[nitroboie]

Is anyone still making coil brackets like the BTI one?

Purchased a coil and powerstage last weekend, just waiting for the boards to return in stock.

[thismachine13]

Originally Posted by Duder

Great to hear you got it sorted out...I'm glad we could help!
Go out and enjoy it.

I still have to get my tach sorted out too - I'm procrastinating on that.
There's an original spark output wire from the EZK that "might" work to drive the tach even without a relay.
I'll report back if that works.

Yeah....let me know how that works out. I'm always looking to clean up the engine bay and if I could ditch even this little relay that would make me smile.

It always amazes me how I see things so abstract until I get my hands on things, then start piecing it together....suddenly.....it all makes sense and is simple.

[thismachine13]

Is it possible that after installing the wasted spark that the fueling requirements could change? IOW additional fuel with a slightly larger injector?

[brian smith]

It seems like there might be another option somewhere from the popular North American brands rather than using these?
Right now, I'm using 4 of the wires from the NGK kit for the V8 Land Rover in which that coil comes stock, and the lengths are a bit longer than ideal. At $20 for the 8-pack, I could source the shortest 2 wires from 2 kits, but it would be nice to see some large diameter wire options as well.

[MadDog_945]

has any of you guys to experienced advantage in milage?

[thismachine13]

I haven't seen any additional mileage gains, no.

[supreme940]

For tach signal back, keep the wires on the coil or wire in a relay where it was.

[thismachine13]

Originally Posted by supreme940

For tach signal back, keep the wires on the coil or wire in a relay where it was.

Yes.....currently using a gutted relay for my tach.

[Karlos_UK]

i thought the point of using the J702T unit was to use the tach driver onboard?

[thismachine13]

Originally Posted by Karlos_UK

i thought the point of using the J702T unit was to use the tach driver onboard?

That is one of the perks of using that coil.....yes.

[Karlos_UK]

its the power unit, not the coil but anyway the above sketches are suggesting that the unit needs a relay?

[thismachine13]

Originally Posted by Karlos_UK

its the power unit, not the coil but anyway the above sketches are suggesting that the unit needs a relay?

Igniter, my bad.

[nitroboie]

Originally Posted by Karlos_UK

the above sketches are suggesting that the unit needs a relay?

Yes, however the earlier diagrams in this thread show the tach hooked to TAC.




Maybe people were having issues with it powering the tach and that's why the updated picture shows the relay method?

[lverhagen]

Random update:

If anyone is seeking to go with the components detailed in the diagram above, the necessary wiring connectors can be purchased new for a cleaner install:

Connector for Bosch 0 221 503 407: TE Connectivity 282191-1

Connector for Mitsubishi J702T: Sumitomo DL 090-8S-2
(benefits from one terminal plug to prevent moisture ingress: Sumitomo 7160-9787)

[soclosenotnear]

Nice^ I bought a used j702t connector.

[MrKrabs]

As an utter noob at wiring and anything related, I must ask: what's the recommended wire gauge for this, and no need for shielded, right...?

[soclosenotnear]

Originally Posted by MrKrabs

As an utter noob at wiring and anything related, I must ask: what's the recommended wire gauge for this, and no need for shielded, right...?

I used 16ga for the board wiring and that was bigger than needed. 20 gauge would be better and easier to work with.