16 volts to ignition coils?
Ok--I have been pondering how I can upgrade my ignition. I do not have any problems with the oem thus far (yes i am above 300g/sec). Upgraded wires and connectoers, denso plugs set at 30 gap. Pettit flash tune. redline now at 7.5-8K
SInce I am not having any blowout problems, only rare misfire(who doesnt?) I ask myself why mess with it? My answer is "Hell, I dont know" I just do." Now my question is in referrence to upgrading to the "Yukons/LS2's" Its is " would it be better to increase the supplied voltage to the coil (16 V rather than 12V) instead of increasing the dwell time ?" I am thinking it may be adventasious to increase the voltage. But, I am an almost noob when it comes to this stuff. Now if it was a single coil system with points I would say Hell Yea, but with this cnp /ecu set up I am not sure. olddragger |
I'm a newb aswell, but wouldn't you need a 16V battery?
Thought ours is 12V? Hm. Haven't had to screw around with it yet, so dunno. |
hmmm...Kenne bell boost-a-coil ? :D:
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No additional coil output + lots of added heat = bad idea.
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Originally Posted by olddragger
(Post 3309694)
Ok--I have been pondering how I can upgrade my ignition. I do not have any problems with the oem thus far (yes i am above 300g/sec). Upgraded wires and connectoers, denso plugs set at 30 gap. Pettit flash tune. redline now at 7.5-8K
SInce I am not having any blowout problems, only rare misfire(who doesnt?) I ask myself why mess with it? My answer is "Hell, I dont know" I just do."
Originally Posted by olddragger
(Post 3309694)
Now my question is in referrence to upgrading to the "Yukons/LS2's"
Its is " would it be better to increase the supplied voltage to the coil (16 V rather than 12V) instead of increasing the dwell time ?" I am thinking it may be adventasious to increase the voltage. But, I am an almost noob when it comes to this stuff. Now if it was a single coil system with points I would say Hell Yea, but with this cnp /ecu set up I am not sure. olddragger |
Originally Posted by olddragger
(Post 3309694)
I ask myself why mess with it? My answer is "Hell, I dont know" I just do."
olddragger :wiggle: |
Originally Posted by olddragger
(Post 3309694)
instead of increasing the dwell time ?"
olddragger How long will they coils last is the question . I'm reasonably comfortable that they will be ok for street use for a while . Not confident they will last at the track however .... |
good info guys --thanks. now if i could only afford to buy a cobb unit. Must look for coupons.
OD |
Originally Posted by Brettus
(Post 3310241)
I have experimented with increasing the dwell time a little on the stock coils and found that it definately did stop the misfire i had at around 280lb/ft of torque .
How long will they coils last is the question . I'm reasonably comfortable that they will be ok for street use for a while . Not confident they will last at the track however .... |
Originally Posted by Brettus
(Post 3310241)
I have experimented with increasing the dwell time a little on the stock coils and found that it definately did stop the misfire i had at around 280lb/ft of torque .
How long will they coils last is the question . I'm reasonably comfortable that they will be ok for street use for a while . Not confident they will last at the track however .... |
Originally Posted by Brettus
(Post 3310241)
I have experimented with increasing the dwell time a little on the stock coils and found that it definately did stop the misfire i had at around 280lb/ft of torque .
How long will they coils last is the question . I'm reasonably comfortable that they will be ok for street use for a while . Not confident they will last at the track however .... The spark duration and current remains the same, regardless of the dwell duration after 3ms or so. |
Originally Posted by paulmasoner
(Post 3310041)
I can answer that a bit better OD. Because you know that although you've had good success(or luck) thus far with OEM coils, it is more likely than not that at some point they will be a point of avoidable failure. And that failure could easily be catastrophic. Although I'm sure you'd love the excuse to tear down the motor and rebuild, you are smart enough to not be asking to do so needlessly:eyetwitch
:wiggle: |
Originally Posted by cliffkemp
(Post 3347504)
If your coils start to fail, it is not going to be catastrophic as it will just lose power on top end until they quit firing and the car no longer works.
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Originally Posted by MazdaManiac
(Post 3347894)
Unless the leading stop firing under load, which can be catastrophic.
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EDIT: just noticed this was pointed out right above me. FWIW though, that isnt just theory - its actually happened to people here :(
unless as the coils die you get a leading misfire, and trailing fires as normal... say goodbye to a seal or an endplate |
Originally Posted by paulmasoner
(Post 3349507)
EDIT: just noticed this was pointed out right above me. FWIW though, that isnt just theory - its actually happened to people here :(
unless as the coils die you get a leading misfire, and trailing fires as normal... say goodbye to a seal or an endplate |
There is really only one good way for the hobbyist to diagnose a failing coil (the test in the FSM and observing spots on the bottom are useless as a diagnostic).
That is to tape a good-quality inductive timing light to the windshield and take a drive. |
Originally Posted by MazdaManiac
(Post 3350407)
There is really only one good way for the hobbyist to diagnose a failing coil (the test in the FSM and observing spots on the bottom are useless as a diagnostic).
That is to tape a good-quality inductive timing light to the windshield and take a drive. |
Flash --did you mean the Twin Power?
OD |
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^ Seriously.
Do people here (still) just not understand how a coil with an internal ignitor works? |
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