hows everybody doing?

anyways, my buddy and i are trying to do something kinda wild. we have 4 direct ignition coil packs of a RSX k series motor. Our goal is to get rid of the B seires distributor and run these coil packs on a b seires motor.

you may ask "why the hell would you want to do that?" and to that i reply, having 4 seperate coils, one for each spark plug will be better then one coil powering 4 plugs. but if i said that i would be talking ****, the real reason i want to do this is that it would be cool to look at a engine bay and see no distributor.

our first plan was to run a seperate ford escort ignition ecu with a aftermarket geared crank angle sensor along with a piggy back system to change ignition timming for vtec engagment. what we would also do is, make a plate to block off the hole left by the dizzy but keep the angle sensor in there, and mimic the rest of the sensors the stock honda ecu needs electronicly so the P28 will be happy and not throw any codes. it would think everything is cool, all the while a seperate ecu is controlling ignition. we scrapped this idea because its too complex.

one day i was searching around the internet and found this:
http://www.electromotive-inc.com/products/xdi.html

this is a system that electromotive developed to do exactly what i want to do, get rid of the stock distributor and run direct coils. i read the instruction manual they have online but still have no idea how it works. what i don't understand is how the system keeps the stock honda ecu from going crazy, it doesn't look like its connected to the honda ecu in anyway.

my new plan is just to buy the seperate pieces in their kit. in the electromotive kit, they have there seperate coils that can be mounted anywhere. i want to use these RSX coil packs that are built into the part that plugs on to the spark plug (very cool).

so i guess i wanna know the following:

how does the distributor work exactly? what signals does it need?
in a honda ecu, what sensors does it look for to know when to fire?
Does the honda ecu even control the firing of the spark plugs? or is it all machanicaly driven by the dizzy gear and cap and rotor?
does MSD have any kits that do what i want to do already?
do you know of anyone running a direct coild system on a honda with no dizzy?

i think thats it. what do you guys think? please have a look at the manual for the electromotive direct ignition system and tell me what you think. i will email electromotive about this. thanks!!!

John

 

You'll have to go farther than the electromotive system to get rid of the distributor. The ecu uses the signals from the distributor to know when to fire the injectors. There are 3 sensors in the distributor in the form of like spokes on a wheel. A crank angle sensor, with many positions, a cylinder sensor, with 4 positions, and a top dead center sensor, with 1 position. The computer uses these to determine which injector to pulse, and at what point in the rotation of the motor.

The ecu controls the spark through the ignitor, thats how the ignition maps in the motor control the spark timing. The electromotive spark is a good system, but it won't do what you are describing. Now the electromotive Total Engine Control is another story... That is a stand alone engine management system that can eliminate the distributor by using a sensor wheel on the crank. But $$$.

 

hmm but on the electromotive site it says "Remove your distributor, and never look back..."

i know there has to be another way then running a pure standalone system. i don't know if yoiu read the electromotive XDI system instructions, but it does come with a timming wheel among other things.

 

Yes, but that timing wheel goes on the crank, and has 58 teeth on it, not like the 17ish, 4 and 1 on the honda. The computer would have no way to tell which injector to fire, and when it was on tdc. It's just not calibrated for that. As far as their tag line... I'm sure there are some cars that use separate sensors for the ecu to pulse the injectors (for some reason the V6s come to mind), but unfortunately it's all in one for the B series. Trust me, I wish it weren't so, I'd love to get rid of that thing.

 

Been done already. AEM ECU + AEM C2DI module can do it. Not my set-up so don't ask me how!

 

where did you find tha pic and did it have more info?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RStoR &raquo;</TD></TR><TR><TD CLASS="quote">Been done already. AEM ECU + AEM C2DI module can do it. Not my set-up so don't ask me how!</TD></TR></TABLE>



Or you can also run 2 dual post coils and have a wastefire setup.. This is what im going to be doing..

 

****, i need more info on this stuff

i'm having trouble finding any info on the AEM forum. i don't know what words to use to search.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lilbucu &raquo;</TD></TR><TR><TD CLASS="quote">****, i need more info on this stuff

i'm having trouble finding any info on the AEM forum. i don't know what words to use to search. </TD></TR></TABLE>

Search for dfi, wastefire, coil on plug..

 

on my b18a i am going to be running dual solex sidedraft carbs. i dont have an ecu and no ibnjectors, i am debating using coil packs so i can toss the distributor too. i might be picking up a b20b longblock. i know the newer b seires motors have the crank position sensor comming out the plastic crank cover, can i use this ti trigger my coils? ill be running a msd sci ingition system to create the spark

 

You can modify the CKF sensor ("the crank position sensor comming out the plastic crank cover") to produce two pulses per crankshaft revolution. This will make it compatible for use with almost any standalone ignition computer designed to operate two coils on a 4 cylinder engine (wasted spark). A quick Google for "standalone ignition computer" should net you a handful of options. Here is just one of them:

http://www.gems.co.uk/ems/standard_minidls.html

 

or use the Tony1 kit with aem ems..this is my car...

 

man that **** looks good, great job tony

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RStoR &raquo;</TD></TR><TR><TD CLASS="quote">Been done already. AEM ECU + AEM C2DI module can do it. Not my set-up so don't ask me how!

</TD></TR></TABLE>

This is correct.. And they also make a cam trigger so that you can completly remove the dizzy..

****, didnt see the post 2 posts up..

 

do a search on pgmfi.org under machine and theres a big thread...

there is a few guys running these already and will make you what you need to get it goign off the stock ecu

i wouls have them done but i ran out of money so i cant afford to buy one


Modified by machine4321 at 4:37 PM 5/12/2005

 

also i nthat pic he is using the cam sproket as the tooth count for pick up ...pretty dam smart