Wiring wasted spark on a odd fire V10 (s100)
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Re: Wiring wasted spark on a odd fire V10 (s100)
The main problem with this engine isn't the odd fire, it's the crank trigger. Here's a picture:
A V10 also requires the number of teeth to be divisible by 10, so the only valid numbers are 20, 30 40, 50, 60, 70 and 80.
The odd fire also requires a cam sensor.
The wasted spark coil packs shouldn't be a problem. Wiring them up as per OEM will result in the same firing pattern and timings as OEM.
We have a customer who has fitted an external 60-2 trigger wheel, and the engine runs. I'm not sure how much further they've got yet. It's running the standard wasted spark coil packs.
That only has 10 teeth, the S Series require 12 at a minimum. These are also unevenly spaced.A V10 also requires the number of teeth to be divisible by 10, so the only valid numbers are 20, 30 40, 50, 60, 70 and 80.
The odd fire also requires a cam sensor.
The wasted spark coil packs shouldn't be a problem. Wiring them up as per OEM will result in the same firing pattern and timings as OEM.
We have a customer who has fitted an external 60-2 trigger wheel, and the engine runs. I'm not sure how much further they've got yet. It's running the standard wasted spark coil packs.
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Re: Wiring wasted spark on a odd fire V10 (s100)
It looks like that flywheel could be adapted to have 20 equal teeth.
But the OP wants to use the existing wasted spark coils but the matching wasted spark would not be required at the conventional 180 degrees away. I thought that perhaps you could wire 2 outputs to one duel coil, fine in principal but its more than likely that the dwell requirements would scupper that idea?
But the OP wants to use the existing wasted spark coils but the matching wasted spark would not be required at the conventional 180 degrees away. I thought that perhaps you could wire 2 outputs to one duel coil, fine in principal but its more than likely that the dwell requirements would scupper that idea?
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Re: Wiring wasted spark on a odd fire V10 (s100)
Two unamplified coils to one output is very unlikely to work, and is risking blowing the driver.
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Re: Wiring wasted spark on a odd fire V10 (s100)
:0 I wouldn't actually try it without asking you to test it first! Just thinking how the OP could make it work like Dodge did, they must have connected 2 outputs to 1 coil?
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Re: Wiring wasted spark on a odd fire V10 (s100)
Where's your sense of adventure?
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Re: Wiring wasted spark on a odd fire V10 (s100)
I've never had any luck trying to get more than one inductive coil to fire off a single trigger ( unless wired in series )
As for the trigger pattern....At present it cannot work as is....but is that a hardware limitation, or could the trigger not be added to the software/firmware ?
As for the trigger pattern....At present it cannot work as is....but is that a hardware limitation, or could the trigger not be added to the software/firmware ?
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Re: Wiring wasted spark on a odd fire V10 (s100)
Apparently it's a hardware limitation. But that would also read as 20(Not checked properly, could be something else)-2-2-2-2-2 due to the uneven angles. Or something like that.stevieturbo wrote:As for the trigger pattern....At present it cannot work as is....but is that a hardware limitation, or could the trigger not be added to the software/firmware ?
Something to add to the to do list.
If anyone ever has the chance to generate a crank scope on one of these, pass it on and I'll see what I can do.
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Re: Wiring wasted spark on a odd fire V10 (s100)
http://www.vems.hu/wiki/index.php?page= ... iperEngine
http://www.msextra.com/forums/viewtopic ... 31&t=40650
http://www.vemssupport.com/forum/index.php?topic=1972.0
I've often wondered why an ecu couldnt simply learn a crank trigger.
eg leave cyl1 plug in, all others removed and spin the engine over.
The ecu would see the repetitive pattern, it would also see a speed change when cyl1 is on compression and should be able to work everything out from there and just learn the pattern ?
None do this...but it sounds easy lol.
http://www.msextra.com/forums/viewtopic ... 31&t=40650
http://www.vemssupport.com/forum/index.php?topic=1972.0
I've often wondered why an ecu couldnt simply learn a crank trigger.
eg leave cyl1 plug in, all others removed and spin the engine over.
The ecu would see the repetitive pattern, it would also see a speed change when cyl1 is on compression and should be able to work everything out from there and just learn the pattern ?
None do this...but it sounds easy lol.
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Re: Wiring wasted spark on a odd fire V10 (s100)
I think you all misread that.Rob Stevens wrote:2 outputs to 1 coil?
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Re: Wiring wasted spark on a odd fire V10 (s100)
Yes, we did!
You would need to use diodes to protect the output that is off while the other one is firing.
You would need to use diodes to protect the output that is off while the other one is firing.