Okay. I'll play your game. What's dwell??

 

That sounds important.

 

You not off here, you are correct Thunder.

 

Sounds good since I've got both on order. Jeff, is this something you plan to act on and when?

 

Wow... so my Mazsport ignition solution is not currently optimal. Damn!

I want more HP!

 

No, with the current settings it's not. The good news is Mazda thought it was important enough to make a table to not just address it but vary the settings based on two different variables. There is more in your Ignition Solution, about 380rwhp that I know of.

 

Any thoughts on the ability to wring out more performance from the MSD LS2 coils??

Even after a short drive of @5 min, they are the hottest to touch parts under the hood.

 

Sounds good since I've got both on order. Jeff, is this something you plan to act on and when?

 

Dwell is more related to points type ignition systems. How long the points stay open which is related to points gap. The larger the points gap the longer the points give spark to the spark plug.
Now if the AP can lengthen the spark duration,, don't know. Will it benefit the tune if it could, don't know.
Seems to me with the proper AF's the spark duration would not be to much of a factor.
Leaner AF ratios would not need a long duration of spark.
Maybe more of a factor with very rich AF's for complete combustion. Also a longer spark duration will effect timing. Such that if it were started to early, detonation. If it lasted to long at higher rpm's, detonation/overlap on the next combustion cycle.
Optimum would be to have the shortest most powerful spark available at the leanest AF and timing point.

 

The dwell is adjusted by setting the points gap to a specified distance at maximum opening. A narrower gap gives more dwell and a wider gap gives less. Taking it to extremes, excessive dwell means that the points close too soon after opening, cutting off the magnetic field collapse before it delivers all its energy. Too little dwell gives the magnetic flux insufficient time to build up to the maximum.
Both conditions give a weak spark which gets even weaker as the engine RPM rises and produces misfiring at normal operating speeds. The dwell, as well as spark plug gap, do have an effect on ignition timing. The later the points open, the later the spark comes and retards the timing. The earlier the points open the sooner the spark comes and advances the timing.
I'm just missing points altogether. I think in saying duration of spark, I was more meaning spark power.

 

8000 that's it. I use to burn up points in 1500 miles or less at 10,000+ rpm. Ah the good old days. Thank God for EI.

 

keep talking about this. i love learning.

 

cool stuff.

beers

 

It wouldn't be "optimizing" - it would just be correcting for the different dwell of the MazSport ignition to get it to react the way the OE coils already do (as well as the other integral-ignitor coils that function as replacements for the OE coils).

Much like fuel injectors, you would just need to know the "latency" values and then you square up the table to get you back where you started before the swap.

 

Is that something you can do then? I assume you have many other clients that have both as well. Thx

 

so to "dumb this down" a little bit, if you have the ignition solution ,and cobb, you can tune for the new ignition and get a horse or two more out of the car, compared to a car that is running a different engine management?

 

No.
If you have the MazSport ignition and the AccessPORT, (or the Int-X or another aftermarket EMS) you can adjust the calibration so that it simply runs correctly.
Without access to the dwell adjustment (like having the ignition and an OE flash), you might run the coils out of their charging range and have misfires.

 

Could this help explain my problems?

 

So basically since I have the ignition system and am running on your "stock" AP settings, the system "could" be running out of range and causing misfires? Those of us running this ignition will need our dwell settings changed to make it work correctly? Am I on target?

 

You need the correct dwell settings or it will not function as well as even the oem coils.

I dynoed 260 whp last week, to give you an idea. Someone with the int-x had issues too, but soon as the dwell was setup, it ran without issue.

 

Wow, just wow. That's what 40-50 hp or so that you lost because of that.

Cel

 

So can i expect this to be tuned when we do our chicago tuning session?

 

Yes. But its correctable. What sucked was going in, dropping $68 for the dyno session and finding the car makes less hp than when I had the stock greddy kit. I felt like selling my car off.

 

So the next question will be, what will it take to get this corrected for my car? Is is one of those per car fixes or is it a blanket adjustment for anyone with the ignition? Will it be necessary for everyone or just people with FI?

 

That is not a definate yet. I will let you know when things are finalized.