JayRome
Blurring the line between 1st to 3rd Gen engines..
As lot of you know that i'm pulling out of the car game... So i'll be writing up a few DIY projects that people requested me to make over the years...
So here is a quick run down on how to make your own Cop kit... Do this at your own risk, not my issue if you blow something up!...
Using Toyota Denso 4 wire coils (or Honda 3 wire) which have built in ignitor's.. Or even factory Evo 4-9 coils...
Coils that i was using: Denso 90919-02240
Mounting plate for early model 4G63: Custom made with 6mm alloy plate
Borrowed off Evolution.net Evo EVO4-9
Modified for early models: VR4/EVO1-3
All the wiring can be tapped directly from you factory Ignitor located on the side of your Intake maifold.
Now using the above diagram (in the photo) wire the coils to your factory Ignitor pack via below Diagram (borrowed from Microtech Aust diagrams) pending on which Ignitor your car comes with, you can usually tell by how many wires are going to your stock coil packs: (might have to switch blue and yellow around, just like mixing up your ignition leads, Also ignore the written color codes from the original print)
Now, after the above mod's you will notice that your RPM gauge no longer works but your car starts and runs..
Here is how you make that work with very little parts:
DO NOT cut off your stock Ignitor pack, leave it where it is and do this:
Pending on which version Ignitor pack you have (which you should have figured out by now from above wiring), you will need a dummy load. I have tried a few things, best so far is a small 12V relay which should be relatively cheap and easy to get: (you will need 2 of these)
Wire them in place of the factory "coil" output from the stock ignitor:
Now the 4pin coil packs should be fine with their "Tach Interface" unit working with the smaller load (Red and White wire are connect to the output of the Ignitor which goes to the coils, Yellow goes straight to the Tachometer which turns to White wire later on)
I have found that the 3 wire coil set up (later model), the Tacho still wont work as they merged the "tacho interface" and "ignitor" into the same housing and it will only work with a larger load (a coil). So you might have to make your own "tacho interface" with a few simple parts (in the diagram below) remember to cut the "tach" wire from the Ignitor and route it to your DIY tach interface: (Diagram borrowed off the MegaSquirt guys)
Added:
Dwell info for those running after market ecu: (Factory ECU is set to approx 3.5 ms)
8V 6.3 ms
9V 5.3 ms
10V 4.4 ms
11V 3.8 ms
12V 3.2 ms
13V 2.7 ms
14V 2.4 ms
15V 2.2 ms
I have been writing this in between work loads, so I may have missed a few things, will update shortly...
Feel free to discuss and or add your thoughts..
So here is a quick run down on how to make your own Cop kit... Do this at your own risk, not my issue if you blow something up!...
Using Toyota Denso 4 wire coils (or Honda 3 wire) which have built in ignitor's.. Or even factory Evo 4-9 coils...
Coils that i was using: Denso 90919-02240
Mounting plate for early model 4G63: Custom made with 6mm alloy plate
Borrowed off Evolution.net Evo EVO4-9
Modified for early models: VR4/EVO1-3
All the wiring can be tapped directly from you factory Ignitor located on the side of your Intake maifold.
Now using the above diagram (in the photo) wire the coils to your factory Ignitor pack via below Diagram (borrowed from Microtech Aust diagrams) pending on which Ignitor your car comes with, you can usually tell by how many wires are going to your stock coil packs: (might have to switch blue and yellow around, just like mixing up your ignition leads, Also ignore the written color codes from the original print)
Now, after the above mod's you will notice that your RPM gauge no longer works but your car starts and runs..
Here is how you make that work with very little parts:
DO NOT cut off your stock Ignitor pack, leave it where it is and do this:
Pending on which version Ignitor pack you have (which you should have figured out by now from above wiring), you will need a dummy load. I have tried a few things, best so far is a small 12V relay which should be relatively cheap and easy to get: (you will need 2 of these)
Wire them in place of the factory "coil" output from the stock ignitor:
Now the 4pin coil packs should be fine with their "Tach Interface" unit working with the smaller load (Red and White wire are connect to the output of the Ignitor which goes to the coils, Yellow goes straight to the Tachometer which turns to White wire later on)
I have found that the 3 wire coil set up (later model), the Tacho still wont work as they merged the "tacho interface" and "ignitor" into the same housing and it will only work with a larger load (a coil). So you might have to make your own "tacho interface" with a few simple parts (in the diagram below) remember to cut the "tach" wire from the Ignitor and route it to your DIY tach interface: (Diagram borrowed off the MegaSquirt guys)
Added:
Dwell info for those running after market ecu: (Factory ECU is set to approx 3.5 ms)
8V 6.3 ms
9V 5.3 ms
10V 4.4 ms
11V 3.8 ms
12V 3.2 ms
13V 2.7 ms
14V 2.4 ms
15V 2.2 ms
I have been writing this in between work loads, so I may have missed a few things, will update shortly...
Feel free to discuss and or add your thoughts..
