IGN1A Coils
Thread Starter
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
I am running e30 right now instead of e55 like normal because I had to get gas the other day on the way to work.
Also it is a chilly 55F outside, so maybe it is weather.
But so far, so good.
Also it is a chilly 55F outside, so maybe it is weather.
But so far, so good.
Melting Slicks
Joined: Sep 2003
Posts: 2,062
Likes: 117
Thread Starter
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
Top table is what I bumped by 10%. Not the modifier table.
And so far, my numbers are no where near that high. They still drop off a ton at upper RPM like stock.
And so far, my numbers are no where near that high. They still drop off a ton at upper RPM like stock.
Last edited by Unreal; Jan 7, 2017 at 12:39 PM.
Melting Slicks
Joined: Jul 2004
Posts: 2,844
Likes: 144
From: Northern Ireland
Apparently they keep creating more spark power even up to around 8-9ms dwell.
However....Lance seemed to imply with the dwell, we should be aiming for a spark duration target or something, which can depend on lots of other factors.
Not really sure how the average person is supposed to figure that one out, but he did seem to suggest even the 4.5ms I was running might have been too much.
Way over my head that...I'll leave it at that until there is a problem, I run a little more on a friends 4cyl car, but we were trying up to around 45psi boost on it and it seemed to do so without any spark problems. I think that was only around 5.5ms, but would need to check what I left it at.
However....Lance seemed to imply with the dwell, we should be aiming for a spark duration target or something, which can depend on lots of other factors.
Not really sure how the average person is supposed to figure that one out, but he did seem to suggest even the 4.5ms I was running might have been too much.
Way over my head that...I'll leave it at that until there is a problem, I run a little more on a friends 4cyl car, but we were trying up to around 45psi boost on it and it seemed to do so without any spark problems. I think that was only around 5.5ms, but would need to check what I left it at.
Melting Slicks
Joined: Jul 2004
Posts: 2,844
Likes: 144
From: Northern Ireland
I run them at 4.5ms throughout.
Really if anything they would require more dwell under high load vs low load. That may not be rpm dependant.
But time per firing will decrease with rpm, but even at 4.5ms that leaves tons of time in between each firing even at 7, 8000rpm
No idea how the OEM ecu deals with dwell though, there would be no need or desire to overdwell the coils especially at low loads.
Some of Lances comments towards the end of this thread
http://ls1tech.com/forums/generation...ory-coils.html
Really if anything they would require more dwell under high load vs low load. That may not be rpm dependant.
But time per firing will decrease with rpm, but even at 4.5ms that leaves tons of time in between each firing even at 7, 8000rpm
No idea how the OEM ecu deals with dwell though, there would be no need or desire to overdwell the coils especially at low loads.
Some of Lances comments towards the end of this thread
http://ls1tech.com/forums/generation...ory-coils.html
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Melting Slicks
Joined: Sep 2003
Posts: 2,062
Likes: 117
Melting Slicks
Joined: Jul 2004
Posts: 2,844
Likes: 144
From: Northern Ireland
If that sounds like an increase...I'd query whether the numbers on the screen do actually mean that physical dwell time at the coil.
From what I gather, it's perfectly normal for most of the LS coils to be around 4-5ms ( just not the 585's )
From what I gather, it's perfectly normal for most of the LS coils to be around 4-5ms ( just not the 585's )
Thread Starter
Team Owner
Joined: Nov 2007
Posts: 24,035
Likes: 2,342
From: Gilbert AZ
So seems stronger. >4k the dwell is doubled so it should be getting more spark. Still have tr8ix at .028. Will maybe try gapping them up later.
For now, car runs damn good. Starts perfectly hot and cold, drives great.
For now, car runs damn good. Starts perfectly hot and cold, drives great.
