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Old 04-04-2014, 02:44 PM   #176
Karl Buchka
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When you momentarily ground the SET pin, the board will only store the RPM at that moment. It will only limit to that RPM when the ARM pin is grounded.
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Old 04-04-2014, 05:31 PM   #177
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Quote:
Originally Posted by ryank View Post
This drawing is very helpful, but just to confirm, BOTH the 12v to the ICM and the coil should be switched, correct?
If so, are the existing 12v to the stock ICM and coil suitable (switched)? Thank you! (Hoping to get my board soon!)
i used the original powersupply for the original coil for both i think
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Old 04-07-2014, 09:47 PM   #178
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Originally Posted by jay f. View Post
Also the bosch 2x2 can be found on some Land Rovers, 2003-2004 I believe. So the coil and connector could be found together at the junk yard.
For Buchka spark posterity, States-side, here is what I've found whilst searching for the Bosch 2x2 coils aka 0 221 503 407:

Land Rover Discovery MkII & Range Rover MKII -> 99 - 04

I didn't find any other donors listed that would be commonly available here. Found several RR Coils on eBay, and ended up buy a pair of BOSCH coils plus the RR mounting bracket for $39 to the door. It does look like the RR mount will be nicely repurposed for mounting a single coil, and I'll have a spare in the trunk! Will update with a pic once it arrives & is mounted.

Looking forward to getting my board.....my son has mastered soldering (his MS&S runs) so I'll let him take care of these mods. to my EZK.
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Old 05-14-2014, 09:54 AM   #179
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all hooked up and no start. Not sure I have the spark plug wires routed correctly. I've tried this so far...
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Old 05-14-2014, 10:18 AM   #180
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Sent you a PM. You don't have them connected properly. The numbers on the coil correspond to the cylinder number. 1 to 1, 2 to 2, etc.
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Old 05-14-2014, 10:27 AM   #181
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Originally Posted by Karl Buchka View Post
Sent you a PM. You don't have them connected properly. The numbers on the coil correspond to the cylinder number. 1 to 1, 2 to 2, etc.
Thank you. It is running!

Looks like some where I also mixed up the two feeds from the WS board, as it's running with the wires switched... (cyl>coil, 1>3, 2>4, 3>1, 4>2) Will have to sort that out...

Last edited by ryank; 05-14-2014 at 10:34 AM..
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Old 05-28-2014, 09:33 AM   #182
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I have the wasted spark up and running with some ls1 coils. The problem is whenever I ground the ARM lead it kills the car. Any suggestions?
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Old 05-28-2014, 10:01 AM   #183
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If you haven't grounded the SET pin at a certain RPM first then the base arming RPM is 0.
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Old 05-28-2014, 01:26 PM   #184
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Quote:
Originally Posted by Karl Buchka View Post
If you haven't grounded the SET pin at a certain RPM first then the base arming RPM is 0.
I have grounded the SET pin at an elevated RPM and still no luck. I just confirmed continuity from the wasted spark board through the connector and the mometary switch which is normally open and to the ground.
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Old 05-29-2014, 12:45 PM   #185
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Factory-looking LC
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Old 07-06-2014, 06:52 PM   #186
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I used an 4 post "edis" explorer coil and j702t Miata ignitor car runs great. Video to come
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Old 07-11-2014, 09:05 PM   #187
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1993 Volvo 940 Turbo Wagon
B230ft
EZK117

J702T Miata Ignitor
Ford EDIS "explorer" 4 Pole Coil Pack
Buchka Spark Wasted Spark Board
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Old 07-22-2014, 12:29 PM   #188
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Quote:
Originally Posted by ryank View Post
Looks like some where I also mixed up the two feeds from the WS board, as it's running with the wires switched... (cyl>coil, 1>3, 2>4, 3>1, 4>2) Will have to sort that out...
Well, perhaps you didn't mix them up! I just went the same fire drill....wired the BOSCH motorsports coil and the 203 Bosch ignitor module exactly like the schematics in this thread. I double checked my wiring against that schematic, my son triple checked. No joy. I shot an email to Karl who asked me if I was sure the input wires coming from the WS board were correct (triple checked). For ****s n grins, we flipped the 1-4 and 2-3 this morning, and the damn thing fired right up

I'll be dissecting these early schematics against my assembled parts for Wasted Spark posterity.....there is definitely a booger in the soup somewhere......
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Old 07-22-2014, 12:40 PM   #189
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Quote:
Originally Posted by malloy1 View Post
Here is the pinout on the 0 221 503 407 unit:



and the 0 227 100 203 unit is pinned out as (the unit is used to run 3 sets of wasted spark cylinders):

Pin 1-#1 negative coil
Pin 2-#1 Input
Pin 3-#2 negative coil
Pin 4-ground
Pin 5-#2 Input
Pin 6-#3 negative coil
Pin 7-#3 Input

This should be the setup using these two parts:

Out From EZK: -> Into 203:____ Out From 203: -> Into 407:
1-4 output -------> Pin 2 _________ Pin 1 -------> Pin 3
2-3 output -------> Pin 7 _________ Pin 6 -------> Pin 1

Pretty picture:

Photobucket

I'm assuming pin 3 & 5 of the 203 unit won't be used to run any cylinders. Also, "Switched 12+", I mean 12+ when cranking too.

Karl looked it over, and thinks it looks right, but if somebody sees something wrong with it, please point it out.

Paul
This is the exact schematic I used to wire up my WS board & Bosch Motorsport coil. She wouldn't fire (apparently she was firing at BDC ) as shown....had to reverse the 1-4 and 2-3 outputs to the ignitor, and then success

I'm going to 100% cross check this schematic against my install (the quadruple check).....but unless those WS board outputs are actually swapped (internal to Karl's board) then something is wrong as shown above. I'll report my findings.
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Old 07-24-2014, 03:55 AM   #190
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Quote:
Originally Posted by DET17 View Post
This is the exact schematic I used to wire up my WS board & Bosch Motorsport coil. She wouldn't fire (apparently she was firing at BDC ) as shown....had to reverse the 1-4 and 2-3 outputs to the ignitor, and then success

I'm going to 100% cross check this schematic against my install (the quadruple check).....but unless those WS board outputs are actually swapped (internal to Karl's board) then something is wrong as shown above. I'll report my findings.
I had to flip my wires as well when I did my install, I chocked it up to I messed up and hooked it up backwards somewhere and just switched the wires.
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Old 07-28-2014, 04:53 AM   #191
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Does the Rev limiter remember set Rpm, or does it reset to 0 each time the car is turned off?
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Old 07-30-2014, 09:52 PM   #192
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Originally Posted by DET17 View Post
This is the exact schematic I used to wire up my WS board & Bosch Motorsport coil. She wouldn't fire (apparently she was firing at BDC ) as shown....had to reverse the 1-4 and 2-3 outputs to the ignitor, and then success

I'm going to 100% cross check this schematic against my install (the quadruple check).....but unless those WS board outputs are actually swapped (internal to Karl's board) then something is wrong as shown above. I'll report my findings.
OK, a status update.

The previous post wiring diagram by Mallory checks out....the 203 Ignition module is pinned out correctly. I can't find any verification for the BOSCH 2x2 407 coil......but at that point in the conversion it's moot. Worst case, the primary coil terminals 1 and 3 are opposite to the wasted spark pairs 1-4 and 2-3 as shown in the subject schematic.

In short, my conversion was temporarily wired, ran, but was (is) gutless. I had to flip the signals from Karl's board, and the car fired right up. However it had a slight miss while idling, but then when driving in my neighborhood the car is completely gutless.....I had to drop her into 1st gear to get it to limp up the hill to my home. I tested 2 each of the 407 coils, 2 each of the 203 modules, even 2 complete sets of plug wires.....all with the same result. The wasted spark board was installed in a 94 Goldbox EZK 207 which came from a well running drivetrain donor so it is not the issue. The wiring was triple checked to confirm there were no errors, and I even ohmed out all of the wires used for the temporary setup and they all read in single digit resistance. The connecting wires between the WS board and the EZK connecting points are all ohmed out and there is continuity everywhere on both sides of the PCB at the attachment points.

I disconnected the standard ignition module in my 92 (un-pinned the ground and used it for my 203 module). From reading early posts in this thread, it has been declared that the original coil & ignition module wiring can be removed as the wasted spark requires none of these inputs. Of course I had no tach during the test as I wanted to validate function first before wiring for the tach.

As another check, I disconnected the WS board outputs, and with my original stock coil & ignition module/wiring reinstalled with the 207 gold box EZK, and it functions normally.

Suggestions? I know many in this thread went the MITSU/Miata parts route, but I'd like to hear from those who used the Bosch 407 coil and the 203 ignition module, and if you made any deviations.

And yes, I've already chatted with Karl and he's provided a couple checks (already done), but he can't do more for obvious reasons.....he's done enough for us already
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Old 08-06-2014, 11:41 AM   #193
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OK, a status update.

As another check, I disconnected the WS board outputs, and with my original stock coil & ignition module/wiring reinstalled with the 207 gold box EZK, and it functions normally.
The latest.....the above statement is FALSE contrary to what I found at first. Driving around on that EZK box sans Buchkaspark resulted in a running vehicle which is setting CEL's, albeit with mostly normal performance. It seems to have an occasional misfire. I'm convinced my son buggered up the EZK when he landed those 3 wires on hardware (chips & the spark resistor).

We will start again with another EZK and reland the WS board, and hopefully we get full function this time around
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Old 08-16-2014, 10:09 PM   #194
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Success! We transplanted the Buchkaspark board into my old 92 EZK, a 148 box without the daughter card & TLAO chip. Temporarily wired the setup today and she fired right up and pulls hard! I'm still getting an occasional misfire with 16 PSI boost, but I suspect I might have a fouled plug, as the wire set was new. I also had quite a collection of wire nuts and wire pieces, so once the final install is completed with factory crimps/solder joints we will see what we've got. I definitely need to find a cool location to mount that 203 ignition module & heat sink block, as that guy gets HOT. Bosch recommends the conductive paste between the 203 and the aluminum heat sink.

The good news is it revs very smoothly, and my butt dyno is telling me that it pulls harder than the OEM single bosch coil setup. Looking forward to making a permanent installation of the wasted spark setup!
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Old 08-17-2014, 06:29 AM   #195
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Quote:
Originally Posted by DET17 View Post
Success! We transplanted the Buchkaspark board into my old 92 EZK, a 148 box without the daughter card & TLAO chip. Temporarily wired the setup today and she fired right up and pulls hard! I'm still getting an occasional misfire with 16 PSI boost, but I suspect I might have a fouled plug, as the wire set was new. I also had quite a collection of wire nuts and wire pieces, so once the final install is completed with factory crimps/solder joints we will see what we've got. I definitely need to find a cool location to mount that 203 ignition module & heat sink block, as that guy gets HOT. Bosch recommends the conductive paste between the 203 and the aluminum heat sink.

The good news is it revs very smoothly, and my butt dyno is telling me that it pulls harder than the OEM single bosch coil setup. Looking forward to making a permanent installation of the wasted spark setup!
Pictures?
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Old 08-17-2014, 07:47 AM   #196
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Pictures?
I'll definitely document the final install with pics and add them to this thread, and my build thread for Project "Cheap Thrills"
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Old 08-17-2014, 09:23 AM   #197
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I'll definitely document the final install with pics and add them to this thread, and my build thread for Project "Cheap Thrills"
Ok, thanks.. :-)
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Old 09-25-2014, 12:33 AM   #198
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Doing an install right now.
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Old 09-25-2014, 07:46 PM   #199
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What do y'all use for wire for the logic level outputs....from Buchka board to igniter?

Are you using shielded wire?
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Old 09-25-2014, 09:24 PM   #200
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What do y'all use for wire for the logic level outputs....from Buchka board to igniter?

Are you using shielded wire?
You shouldn't need to use shielded on the logic level signals.
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