Coil settings

[SmartBOOST]

Hi all. Does anyone knows, the VR-4-s coil settings are the same as the EVO coil settings?

[peter thomson]

If you mean are they the same model then no

[SmartBOOST]

No i mean, is it possible to replace

[wintertidenz]

We run wasted spark, Evos run coil on plug. Won't work, unless you want to go to the effort of coil packs on all plugs and working out how to get it running correctly...

[Nutter_John]

Evo's run wasted spark as well Dan , they have two coil packs and two tiny fly leads

Not sure if they are the same or not

[wintertidenz]

Hmm, thought they ran full coil setup?

Best way to tell would be to get them side by side, ASA probably won't tell us much.

[Ryan]

John is right - they are wasted spark (and he should know, having owned one)

[Adam.Findlay]

yes evo is wasted spark also. coils on cyl 2 and 4? wasting to cyl 1 and 3?
pretty sure the coils are different though. shape wise atleast, the connectors may be the same though?

[Gowf]

Why do you want to change them? If you are going to the effort of messing about like this then you may aswell go for individual coil on plug. However, there are obviously implications of doing this. I wouldnt have said you would need to unless you are starting to run some serious boost though.

[naughtika]

Nikusha, if you are referring to evo coil's dwell times, they are the same as ours (from memory).. if you're planning on using evo coils on your vr4, dont bother with this as the mounts are different. If you insist on this, you need to swap and use the coil boot from the vr4..

evo coil coils are mounted on the following cylinders 2 & 4 (from memory) and the following cylinders fires together - 1 & 4, 2 & 3

i hope that quickly answers your questions

if you're located in a warm climate like Australia, I think replacing them with individual ignition coil is the way to go, having said that I've so far made 10 sets of these and none of the people who bought them have said that they're crap..

not trying to hi-jack or anything, just contributing..

[Davezj]

Why do you want to change them? If you are going to the effort of messing about like this then you may aswell go for individual coil on plug. However, there are obviously implications of doing this. I wouldnt have said you would need to unless you are starting to run some serious boost though.

Have you done this yourself Garth?

I thought about doing this as I have lots of spare coil packs. But the thing that I did not quite understand was what you do with the unconnected spark out on each coil pack.
Assuming the coil fires into the 2 spark plugs in parallel, by removing one spark plug you are doubling the resistance of the load the coil pack fires into. So the spark will be weaker not stronger, but then the energy available to the one plug will increase.
Then you will probably get arcing in the open output. Even if you insulate it some how then you still have a weaker spark.
If you put a resistance in the open output equivalent to the original spark plug then you only get the same effect as having a wasted spark setup.
Let's assume you just insulate the open output then all the energy (which is not split in two) from the coil pack will be available to enter the single spark plug which now has twice the resistance of the 2 plugs in parallel.
You half the current draw due to doubling the resistance so are you saying the voltage the spark plug sees will increase thus making it a bigger better spark.
This is assuming the coil pack can deliver more voltage and it is not internally limited. Or the fact that more voltage available will not just overwhelm the internal insulation of the coil pack and fry the internal circuit.
So you would have to double the resistance of the single spark plug to maintain the same load the oil fires into but all the energy would be going into one plug which sounds about right, the spark would be the same voyage but have twice the current driving it. Which would make it as stronger spark.
You would have to still run it as a wasted spark system, firing 2 coil packs from the same input signal. Which again would change the current draw. So I would imagine using a FET to drive the effectively second coil pack on that circuit would work, although you would add some delay into the firing due to the FET circuit in between the input signal add the coil pack.

But i am Just thinking out loud and this all theory.

[naughtika]

Davezj.. I looked into that in the past, but i think you'll have more troubles than result..

I ended up making these..

Front Bank


Rear Bank