wasted spark conv.

[Guest]

ok i know wastedspark has been covered but how is it done?, i need pics, instructions whatever you got....

there are three wires out of the coil, yel with red stripe, red with yel stripe and white/gray?? tell me peeps what do these do?

[madmike]

This is how i wired mine..

Works well so far

[kamineko]

 madmike']

Works well so far

[Re: Weak Spark?]

[quote name='Ichi Ban said:

cam timing?

/quote]

Wonder if this could be a reason why mine has mysterious miss at 6K and over

*Madmike wonders if he should check his

SNAP!? note my theoretical objections to this mod due to dwell timing haha

[Guest]

 kamineko']

Works well so far

[Re: Weak Spark?]

[quote name='Ichi Ban said:

cam timing?

/quote]

Wonder if this could be a reason why mine has mysterious miss at 6K and over

*Madmike wonders if he should check his

SNAP!? note my theoretical objections to this mod due to dwell timing haha

the 2 topics are not related, hence the seperate topic....

[Guest]

 madmike said:

This is how i wired mine..

Works well so far

where does the 12v go? straight to batt + ?

[kamineko]

madmike said this setup works fine on his car. he has also just mentioned in the other thread i quoted he has a 'miss' over 6k rpm.

yes. its related. and i was talking to him anyway.

regarding your 12V - find the wiring diagrams of both setups. youll see the V1/V2 coils had a common +12V. use that

[madmike]

 kamineko']

Works well so far

[Re: Weak Spark?]

[quote name='Ichi Ban said:

cam timing?

/quote]

Wonder if this could be a reason why mine has mysterious miss at 6K and over

*Madmike wonders if he should check his

SNAP!? note my theoretical objections to this mod due to dwell timing haha

The mysterious miss was one reason i performed the wasted spark modification.

The miss was using standard coils. And this mod was performed as part of the "tracking fault down" process

And as far as the dwell time issue goes..

Am i wrong in thinking that the computer learning would be able to adjust itself to the increased dwell time of the wasted spark coil?

[Guest boostcut]

wire the 12v directly to the battery and leave it over night, if your lucky, it will give you a flat battery, if your not lucky, you will have a sweet camp fire to dance around.

[ReubenH]

Lol, hello. I made that wiring diagram. I should point out that it's more or less a guess, and the subject of dwell timing was indeed brought up with it.

I eventually decided to give up trying to be helpful and be thankful i run an ECU that only has 2 igntion outputs

I.e. My official line is don't copy that diagram! I should actually probably take it down off photobucket... It's very likely not the best way of doing things.

[madmike]

 ReubenH said:

Lol, hello. I made that wiring diagram. I should point out that it's more or less a guess, and the subject of dwell timing was indeed brought up with it.

I eventually decided to give up trying to be helpful and be thankful i run an ECU that only has 2 igntion outputs

I.e. My official line is don't copy that diagram! I should actually probably take it down off photobucket... It's very likely not the best way of doing things.

Mine has been running the setup in the diagram for about a month now..

Car made 146.9kw on the dyno with good AF ratios at 15psi

And the miss i have has now been diagnosed as weak valve springs.

[kamineko]

mike and i had a good chat about this the other night. conclusion was we would like to test the same rig on a more powerful setup (~200kwatw) to see if we can blow out the spark. if that works then its likely all good

[ReubenH]

Nice to hear. As for where the 12v comes from, Just steal one of the coil packs old 12v wires?

[madmike]

 ReubenH said:

Nice to hear. As for where the 12v comes from, Just steal one of the coil packs old 12v wires?

I used a 12v supply off the switched ignition feed..

Used a nice big cable to reduce the possible effects of voltage drop.

[Koom]

 madmike said:

And as far as the dwell time issue goes..

Am i wrong in thinking that the computer learning would be able to adjust itself to the increased dwell time of the wasted spark coil?

They "learn" to a point but it will only adjust fuel and timing at the most. Wanting it to "learn" that you've completely changed the ignition setup is asking a bit much of an ECU that was made over a decade ago

[madmike]

 Koom']

[quote name='madmike said:

And as far as the dwell time issue goes..

Am i wrong in thinking that the computer learning would be able to adjust itself to the increased dwell time of the wasted spark coil?

/quote]

They "learn" to a point but it will only adjust fuel and timing at the most. Wanting it to "learn" that you've completely changed the ignition setup is asking a bit much of an ECU that was made over a decade ago

Very true..

All i can say is on the dyno mine ran fine.

AFR's were good and apart from the miss (which is mechanical)..

All the timing seemed good and the spark was strong.

I would welcome anyone else to give it a try and see if it works for two cars or if mine is a fluke