Pulling timing up top. Plugs or tune?

[FoMoCoMoFo16]

So I was looking for the factory plugs today and found that the part number has been superseded and the new Motorcraft plug is a platinum not iridium? Anyway I've read that people are having good results from brisk racing plugs. Main concern is the timing drop up top from 3-4 shift. I have a upr catch can. Was running 92 with octanium. Powerpack 3 car with the Ford Racing Calibration.

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[FoMoCoMoFo16]

Data log is from this run.

 

[FoxFan]

Just curious how many would be willing to pay a few bucks for an app that can turn a $50 OBDII scanner into a dyno?

To hopefully gen up some discussion about the OP's question, as nobody seems to care, I think your timing drop in the 3-4 shift is just due to the what the tables are commanding directly, but it's interesting that it doesn't drop in the other gears at the same RPM & Load. Does anyone know if Ford's strategy involves different timing by gear?

 

[Genxer]

I always thought that iridium was the pinnacle, at least in regard to longevity. Maybe the platinum performs better?

 

[NoVaGT]

Unobtanium plugs.

You need them.

 

[Idle-Hands]

Just curious how many would be willing to pay a few bucks for an app that can turn a $50 OBDII scanner into a dyno?

To hopefully gen up some discussion about the OP's question, as nobody seems to care, I think your timing drop in the 3-4 shift is just due to the what the tables are commanding directly, but it's interesting that it doesn't drop in the other gears at the same RPM & Load. Does anyone know if Ford's strategy involves different timing by gear?

I am sure their strategy varies by to/from gear and shift type variant (powered up, coasting up etc.). This can be for many reasons including how many clutches are offgoing and oncoming for that ratio change, size/capacity of each clutch involved, calculated trans input torque, relative speed across the clutch.....

 

[FoxFan]

Each clutch involved? What do you mean? Talking about clutch plates in an auto? If so, he has a manual.

 

[Idle-Hands]

Each clutch involved? What do you mean? Talking about clutch plates in an auto? If so, he has a manual.

For some reason I thought I read auto somewhere. Graphs make more sense now

 

[FoMoCoMoFo16]

Did a crank relearn. Going to log it then install ROR14LGS and log again. Passenger header smoked like a fright train during the relearn. Running great now. Also the advance track is hard disabled at the plug.

 

[FoxFan]

Did not update the legend in this new pull with the Dark Blue AFR curve toward the bottom of the graph.

Graph from a 3rd gear street pull today. This one shows a blue and green line from a pull in a single gear from 1500 to 7500 RPM (hitting redline). The blue and greel look a lot more like a what you'd expect to see on a dyno. A peak of around 395/350 rwhp/rwtq. This is lower than most dynos in the 435 range, but in the real world, you're spinning those front wheels and tires, and dealing with other issues, as well.

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