TDStuart Tuning Adventure

[tdstuart]

@engineermike Any thoughts on if I should try to find better injector data or just start changing the maf data?

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[K4fxd]

PMAS is an airflow company. I would trust their numbers.

 

[WildHorse]

PMAS is an airflow company. I would trust their numbers.

James (owner of PMAS) is an actually fluid mechanics engineer.

 

[GregO]

@tdstuart
Are you positive your fenderwell PMAS kit is sealed to 100% perfection at every slip joint from MAF housing to Throttle body ?

 

[tdstuart]

@tdstuart
Are you positive your fenderwell PMAS kit is sealed to 100% perfection at every slip joint from MAF housing to Throttle body ?

Ya I took it off and put it back on making sure to be extra careful and didn't see any fuel trim changes.

 

[engineermike]

@engineermike Any thoughts on if I should try to find better injector data or just start changing the maf data?

You could google for Ford Performance injector data. Be sure to copy over the axes as well. And also, they didn't seem to include the temp slope and offsets so maybe just set those to 1.0.

 

[K4fxd]

Just looked at your log. Your fuel trims look real good. Only glitch is after it went into Cat protection. Turn this off and like Mike said stop logging so many channels. Then do another pull or 2. You will see spikes so never take 1 log as gospel. Do 3 or 4 then average all your MAF data points for a better picture of what is going on.

 

[tdstuart]

You could google for Ford Performance injector data. Be sure to copy over the axes as well. And also, they didn't seem to include the temp slope and offsets so maybe just set those to 1.0.

All that data is for like 39 psi but our cars run at 55. Not sure how to manually convert the numbers

 

[engineermike]

How do I disable cat protection mode? Yes I do not have cats.

This is how I find parameters:

1. Search the massive PCMtec parameter list. Be sure to try all possible terms that could describe what you're trying to find. For instance, if looking for flex fuel parameters, you would search for ethanol, alcohol, enthanol, methanol, E0, E100, flex, ff, ffv, and Brazil.

2. Open up HPtuners and see if you can find it there, then use the crossover spreadsheet. If it doesn't show up in the spreadsheet, you can open a stock file in hpt, change the parameter you're looking for, flash the car, read it using PCMTec, and the changed parameter will show up in orange.

3. Google or post.

4. Trial and error. Many times, I've spent weeks or months just trying to solve one problem. I've been trying to get Gen3 PFI injector duty cycle to extend past 70% for a couple of weeks now and I excited now because I might have solved it today. This is an issue that no professional tuner I am aware of has been able to figure out. What will really throw you off is if you happen onto an error in the OS logic and you have to tune around it. This will drive you insane but very rewarding when you get over the hump.

 

[engineermike]

All that data is for like 39 psi but our cars run at 55. Not sure how to manually convert the numbers

See this is the type of pitfall I was referring to earlier when I was talking about being 100% sure of getting the injector data right. In the Gen2, Ford does their best to adjust pulsewidth as a function of predicted rail pressure (in Gen3 it's measured rail pressure). As such, the injector data has to be there for all possible pressures. So the data isn't just for one pressure.

 

[K4fxd]

If you haven't already rescale your OP cam table to 8000 or 8500
At 5000 RPM use -20 then go to 8000 and put 0. This will not be perfect but will be a lot closer to what is needed. Lund had the exhaust running at 30

 

[Pistol_91]

When you first start the car it should start in emissions reduction mode you'll see in VCT schedule channel. If you're trying to dial in the MAF don't trust the values it's giving at that point. Wait for it to switch to Optimum Stability.
Looks like you're getting a lot of help here. I should have posted here 2 years ago instead of HPT would have saved me a lot of headaches LOL

 

[tdstuart]

See this is the type of pitfall I was referring to earlier when I was talking about being 100% sure of getting the injector data right. In the Gen2, Ford does their best to adjust pulsewidth as a function of predicted rail pressure (in Gen3 it's measured rail pressure). As such, the injector data has to be there for all possible pressures. So the data isn't just for one pressure.

Do you know how I would go about using the ford injector data? I tried some other roush data and it seems to be pretty good too I’ll post a log in a bit.

 

[tdstuart]

When you first start the car it should start in emissions reduction mode you'll see in VCT schedule channel. If you're trying to dial in the MAF don't trust the values it's giving at that point. Wait for it to switch to Optimum Stability.
Looks like you're getting a lot of help here. I should have posted here 2 years ago instead of HPT would have saved me a lot of headaches LOL

Atleast hpt forums is better than pcmtec. No one talks there

 

[Pistol_91]

Atleast hpt forums is better than pcmtec. No one talks there

LOL that can be the case on HPT sometimes too. Your recent log doesn't look bad it just can be optimized a lot in some areas like timing and cam angles.
You don't need to log Knock Correction AND Knock Retard. They're the same exact thing, one just reads opposite of the other. So that's a channel you can delete. You need to log some of the "source" channels. Spark source Torque source etc etc. You also don't need to log every single map point unless you're working in that specific one. I would only log your WOT MP's for now.

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