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Evo How Tos / InstallationsPost or link to your detailed how to / installation articles in here. If you have any questions regarding the how tos, feel free to post them in the Request sub-forum.
This is a topic I saw on another forum and found it very interesting:
So you guys out there that have been pondering this, it's a lot easier than you think. I would list this as one of the best mods I've done yet. Even if you're not boosting 25psi+, it's still a worthy mod. The low end torque and improved throttle response alone are worth it. My car also idles better, and runs smoother now with these. I was shocked how much better overall my car ran. Next thing I'm doing is opening the gap on my spark plugs and see how wide it will go without break up. That alone should net a little power gain, and better gas mileage. The plugs won't foul out as fast either. So here is what you're going to need.
- (Connectors to plug into the stock harness) I got them from spoolinup.com because I didn't have the time to look around. If one of you guys finds a source, please share.
- (Denso coils) I chose to get mine from a 2001 Honda Civic because they only have three wires to hook up, and they're a dime a dozen so getting replacements in the future will be easy. The Honda/Acura coils are much easier to setup than the Toyota coils. Any coil from a RSX, TSX, S2000, or later model Civic, or Accord will work. The Civic and RSX guys have used the OE coils to almost 900whp so I'm sure most of us will be ok with them.
- (Connectors or pigtails to the coils) I bought my coils used from a wrecking yard and the guy was cool enough to include the harness with them at my request. I only paid $100. Prices are obviously going to vary.
- (Three spools of 18 gauge wire) I chose black (for ground), red (power), and blue (signal)
- Electrical tape, and any other misc things for electrical wiring. Basically, it's as easy as hooking up the corresponding wires. Here are the wiring diagrams.
- This is the Evo diagram. If you're not familiar with looking at these, the WHITE/RED (1.25W-R) wire is the power wire. The BLACK (1.25B) wires are the ground. The BLACK/YELLOW (B-Y) on coil one, which I believe is the passenger side coil, is the signal wire. And the BLACK/GREEN (B-G) wire on the driver's side coil is that coil's signal wire.
These are the connectors that would plug into the Evo's harness. These take the place of the stock coils. I have them wire up already. You have to double up the wires going into one pin because the signal goes to two coils directly, not just one. There are two red, two blue, and two black wires.
- Keep in mind that the passenger side connector controls the two inside coils, and the driver's side controls the outside coils.
- This is the 2001 Civic wire diagram. The Civic's wiring is similar to the Evo's. The BLACK is ground for all the connectors, the BLACK/WHITE is power, and the other colored wires are the signal to each one. I just wired the colored one's to my blue wire from the connectors.
These are the pigtails from the civic.
The coils themselves. With these coils, you don't need a bracket. If you rotate them, the hold down hole aligns with a valve cover bolt. So you just need to call up Bowlin Bolts in Berkeley and get some 90mm long 6x1.0 metric bolts.
I'm still looking for a long rubber grommet to use between the valve cover and the coil itself as a way to prevent anything from falling into the spark plug holes. This is a rough mock up I did to make sure everything was ok. The car started on the first try, and immediately I could tell it sounded smoother. This is basically how the wiring should be done Have fun.
These are some benefits of this setup:
- Expect just about every aspect of the car to feel better.
- Improved throttle response (especially between shifts), little to no cruise partial throttle jerk.
- Stable and smoother idle.
- Acceleration is noticeably smoother.
- Gain HP/TQ (8-20 hp is the norm, mod dependent)
- Increased gas mileage (I get 1-2 mpg better mostly highway)
- Ability to run a bit more gap. It's like driving a new car, you won't believe the difference.
- Handle 650+ HP, tested to 800whp
- Run more boost
- Greatly reduce or eliminate partial throttle cruise bucking.
This is the result of my own cop setup:
My RSX 2006 coils arrive 12/22/2011
Today I make my own aluminum plate, I have to say that this is very dificult to do, spent all afternoon making it but here is the results:
This kind of stuff should be all over EvoM-- somehow threads like this get lost amongst the multiple "How do I wash my Ralliart", and "What cam/turbo/ floor mat spacers should I buy?"ect "threads. Nice work.
So you are running these without any type of ignition booster or cdi box? Is that because of the coil you chose specifically? I have a spare set of coils from when I had my 2G dsm that I never got around to wiring up, I was going to try those but thought you needed a ignition booster or something to make them work due to dwell time??
If not, then you sir are my hero of the week
So you are running these without any type of ignition booster or cdi box? Is that because of the coil you chose specifically? I have a spare set of coils from when I had my 2G dsm that I never got around to wiring up, I was going to try those but thought you needed a ignition booster or something to make them work due to dwell time??
If not, then you sir are my hero of the week
No ignition booster needed, the coils work good with the stock signals from ECU, remember the system, 1 positive wire, 1 negative wire and 1 trigger for each coil, is the same as stock coils but instead of two used four individual coils.
Is the same kit from spooling up but spooling up make a complete kit with new denso coils, carbon plate and good look wiring, all the kit for $430, is the same kit except that one can do it yourself. In my case I'm thinking of making the plate in aluminum.
Nov 28, 2011, 05:06 PM
How to make cheap coil on plug setup
This is basically how the wiring should be done 
Have fun.
