How to: Coil packs on a 20 valve

[ATAl]

I've got coil packs running on my 4age and thought anyone doing the same thing in the future may appreciate this.

What you need:
1zzfe coil packs, others apparently work but I haven't tried them
The wiring harness plugs with a bit of wire sticking out for the coil packs
After market ecu (link g4 in this case)
20 valve 4age of some sort.

How to install:

First you need to make the coil packs a tiny bit thinner, in the photo below the coil pack on the left has been filed and sanded the one on the right hasn't yet. You only need to take off about 1mm at the most, mainly to get rid of the ridges you can see.



All installed, I haven't bothered to bolt them down as the fit is very tight and they shouldn't fall out, will find out if this was a good idea after I've driven for a while



Next wire them up, in this pic red and black is +12v, green and red is trigger, white and black is ground and white and red is the firing confirmed signal, you don't need that one.

The +12v I wired to the main relay output, the trigger to the link ecu and ground to ground.



All wired up:



That's it, nice and easy really and they work well too.

[Dell'Orto]

Have you done a dyno run to see what difference they make? Would be interesting to see.

[ATAl]

No, have just built this engine from scratch so there's no 'before' dyno. I doubt this would make a power difference, I've done it more to make sure there's a good spark at high boost levels.

[Kittah]

Not that I'm interested in doing this, but that's an easy and nice writeup

More to my point, out of curiosity as it is, what is the advantage of running coil packs?

[Rick]

You can also run them off the factory ecu, good for RWD conversions.

[Crampy]

Been done with Honda K20A coil packs on stock Blacktops, stock ecu too. As mentioned, good for RWD, as you don't need the dizzy cap (no need to modify firewall)

[XSVWGN]

im using evo2 coil packs on mt 4agte. great conversion and much better spark. Alex your car is coming along fast ... cant wait to see this going. Oh and i cant wait to put mine up against yours haha

Matt

021 297 1754

[Quirky]

If you're making under 200kw atw, is there any need to run coil packs?

[ATAl]

I don't know at which level of power or boost the standard distributor set up will stop sparking properly, but the advantage of running coil packs with an after market ecu is that the spark timing can be changed a lot easier and you can do fun stuff like anti-lag.

As Matt said, you can use evo coil packs, but as far as I know you need an separate igniter unit for them and I wanted to make the ignition as simple as possible - the igniter is built into these coil packs, just run wires to them and they work.

[metal_sean_head]

but the advantage of running coil packs with an after market ecu is that the spark timing can be changed a lot easier and you can do fun stuff like anti-lag.

Now we are talking!!

[gasman]

my distributor set up was still good for 272kW.

[frost]

You can also run them off the factory ecu, good for RWD conversions.

Been done with Honda K20A coil packs on stock Blacktops, stock ecu too. As mentioned, good for RWD, as you don't need the dizzy cap (no need to modify firewall)

can you point me in the direction this info is kept, ive been out of the 20v mods for too long and lost track of most of my good info spots,

[matt dunn]

You can also run them off the factory ecu, good for RWD conversions.

I too would like to know how to do this,
especially since the factory ECU only has one output for spark??

[ChaosAD]

By connecting all four coilpacks to the igt signal from the ecu.
Like wasted spark but all four are firing at once.

I guess it might work with the blacktop being sequential injection, but its not really the done thing.

A better way to do it would be to build a small 'router board' which routes the igt signal to the right coil pack.

[dusk93]

I think dad was/is gunna make me a 'router board' to see if we can run wasted spark off stock ecu, will keep you guys posted on if it works or not

[Crampy]

You can also run them off the factory ecu, good for RWD conversions.

Been done with Honda K20A coil packs on stock Blacktops, stock ecu too. As mentioned, good for RWD, as you don't need the dizzy cap (no need to modify firewall)

can you point me in the direction this info is kept, ive been out of the 20v mods for too long and lost track of most of my good info spots,

Club4ag forums.

http://forums.club4ag.com/zerothread?id ... 370#167370

[TRD_ZERO]

Sticky this.

[matt dunn]

By connecting all four coilpacks to the igt signal from the ecu.
Like wasted spark but all four are firing at once.

Dont think so as the cylinder would fire at BDC between the intake and compression stroke,
so all the fuel and air you have just sucked in would get fired at BDC.

You would need some form of sequencer.

[Bling]

Sticky this.

Will end up in FAQ section for sure when everything has been covered.

[Crampy]

Dudes have done it as per the Club4ag forums. Batch fired with the single output forn the ECU. It works.

It's not really done as a performance mod as such, it's more for the RWD dudes and not needing to use original dizzies or the expensive kits to change it's position.