Altezza 3SGE external coil conversion

[xnickx]

Anyone out there done it?

Trying to find a coil that will replicate the IGF wire.
Car has internal coil packs at the moment, but for those that dont know, the 3SGE tends to cook the coil packs and burn them out, hence why I'm planning on converting mine to external coils

The 3SGE ones have the ignitor in the coil pack itself.

There are 4 wires:
Positive
Trigger
Ground
IGF (ignition fail)

The IGF is what I'm most worried about, as without that signal the engine will run on safe mode.

The wire pretty much tells the ECU that the plugs are firing correctly etc.

Anyone out there done a similar conversion?
Know of a coil pack that can replicate this signal?

[Titties]

not sure about the coilpacks.
but with preventing this, i've seen people chop the read section of the engine cover off to allow these to cool. and maybe with a raised bonnet it would be enough?

[Emperor]

not sure about the coilpacks.
but with preventing this, i've seen people chop the read section of the engine cover off to allow these to cool. and maybe with a raised bonnet it would be enough?

Not to start an arguement, more to prevent a mistake being made, raised bonnets do not have any effect on cooling.

[Burning Angel]

IGF is the signal from the ignitor(built into the coilpack) to the ecu that tells the ecu the coil has fired.

its not really a feature of the coil but that of the ignitor.

[Titties]

not sure about the coilpacks.
but with preventing this, i've seen people chop the read section of the engine cover off to allow these to cool. and maybe with a raised bonnet it would be enough?

Not to start an arguement, more to prevent a mistake being made, raised bonnets do not have any effect on cooling.

so raising the rear of the bonnet wouldn't allow air to flow over the engine and cool the coil packs?

[nite b]

Kits I have seen from Japan have been a bracket that mounts above intake plenum and supports factory coils. Modified leads then run from them to plugs. Prob quite easy to make if you wanted.

[strx7]

Not to start an arguement, more to prevent a mistake being made, raised bonnets do not have any effect on cooling.

It all depends on the shape of the vehicle as to weather jacking the back edge of the bonnet works to inhale air into the engine bay, or to let air flow thru the engine bay.

[NZ_AE86]

You will need more then just external coils, you will need external igniters too. I would go for an igniter off a 4AGZE with a set of mitsi coils and run it as wasted spark.

The IGF is very important as it tell the ECU the quaility of combustion.

[Emperor]

Not to start an arguement, more to prevent a mistake being made, raised bonnets do not have any effect on cooling.

It all depends on the shape of the vehicle as to weather jacking the back edge of the bonnet works to inhale air into the engine bay, or to let air flow thru the engine bay.

I guess so. It didn't make much of a difference for the seven. Maybe slight difference to intake temp but engine stayed some temp.

[matt dunn]

You will need more then just external coils, you will need external igniters too. I would go for an igniter off a 4AGZE with a set of mitsi coils and run it as wasted spark.

The IGF is very important as it tell the ECU the quaility of combustion.

wont work,

as the altezza puts out 4 signals to the coils,

the 4AGZE has two inputs, but they are not one for each coil as you would guess, so you cant just feed two inputs into each,

The 4agze has a trigger input and a decoder input to switch between coils.

need to find a toyota that has 4 external coils factory?????....

[NZ_AE86]

You will need more then just external coils, you will need external igniters too. I would go for an igniter off a 4AGZE with a set of mitsi coils and run it as wasted spark.

The IGF is very important as it tell the ECU the quaility of combustion.

wont work,

as the altezza puts out 4 signals to the coils,

the 4AGZE has two inputs, but they are not one for each coil as you would guess, so you cant just feed two inputs into each,

The 4agze has a trigger input and a decoder input to switch between coils.

need to find a toyota that has 4 external coils factory?????....

Good point! You could still run it as wasted spark with two 20Valve igniters or similar. If I had the car in front of me it would be no trouble! I have done this with other DFI systems and can not see it being a problem.

[Titties]

can't you just move the standard coils, and just run leads to the spark plugs? Sounds like people are trying to make it harder than it is?

http://www.trademe.co.nz/Browse/Listing ... =184630387

an example

[xnickx]

Hmmmm sounds like quite a mission still!

Yeah I've seen the relocation kits of the factory coil packs before.

May just end up doing that instead

[Titties]

spitfire do direct replacement kits for skylines and silvias etc.
do they have a similar ignition system? being coil over cylinder

[nz_climber]

If you look under the beams plastic cover it is full of insulating material, My suggestion would be to loose the top cover (cut it so you can still cover your cam pulleys if you want) and then put in a small duct to blow a bit of air across them (similar to the one used on the standard airbox.)

I won't be running the top cover on mine, but mainly for space reasons, also getting the wiring thats down between the cams for the coils up and out of that area as you can see where the heat has affected the tape holding the loom together and discolouration of the wire insulation.

As for raising the bonnet,on most cars the area at the bottom of windscreen is a high pressure area so won't help.