TDStuart Tuning Adventure

[tdstuart]

@tdstuart
What CAI system was installed for the Lund log Mark is referencing, JLT or PMAS fender well ?

The lund stuff is tuned for JLT but th compare I posted I had the PMAS on as I just ran back to back with mine. I have logs of the Lund when I have the JLT they just aren’t very detailed

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[K4fxd]

Am I understanding correctly,

You ran the Lund tune for the JLT with the PMAS cai?

 

[GregO]

Lots of anomalies between all the logs. I’m not even sure Tristen is keeping good notes of all his changes, tune and non tune related.

Here’s an idea,
Ditch the PMAS and JLT, install the OEM airbox with Motorcraft paper air filter and OEM MAF transfer. Start the logging process over now knowing the aftermarket CAI systems and your homemade air deflector are 100% removed from the equation.

 

[tdstuart]

Am I understanding correctly,

You ran the Lund tune for the JLT with the PMAS cai?

Yep it’s how I’ve been running the car for the past while. The diameters of the the tube are close enough that fuel trims too off

 

[tdstuart]

Lots of anomalies between all the logs. I’m not even sure Tristen is keeping good notes of all his changes, tune and non tune related.

Idk why you think I don’t keep good notes. I don’t but you can clearly see in the tune what stuff I’ve changed haha. All we are changing right now is the injector data

 

[tdstuart]

You're doing this wrong. You need to understand how the injector data works and is used.

Do you know what your fuel pressure is?

Hard when I consistently see people say 3 different things.

Some say that the ford data is wrong just use the roush.

Sone say the ford data just needs to be converted

Some say the ford data works fine and doesn’t need convertibg

And no I don’t have a fuel pressure sensor. I have a dw400 pump

 

[tdstuart]

I would raise the WOT start stop point and see if this band-aids the problem.
Do you have a larger pump and or a BAP? I would check Fuel pressure, need to see it while under WOT. I'd check this even with stock pump.

If on the stock pump I'd re-install the stock injectors, then I'd fix the MAF if needed. Again I don't trust the LU47 specs. But you can just change the MAF curve to make things look good.

Like Gregg asked, what CAI was Lund using?

I have a dw400 fuel pump.

I don’t know how to easily install a fuel pressure sensor and get it to be logged

 

[GregO]

Idk why you think I don’t keep good notes. I don’t but you can clearly see in the tune what stuff I’ve changed haha. All we are changing right now is the injector data

The lack of detail in your posts is a dead giveaway. Nothing personal Tristan, just an observation and pattern I see. We need to keep it real for real results.
Now we just learn you're not running an OEM fuel pump…….

As far as you pointing out “3 different opinions”, you opened Pandora’s box with this thread.

 

[K4fxd]

With the DW400 we have no idea what FP you are actually running. I emailed you a 2009 GT500 cal. It is scaled for 39 base FP but ranges from 20psi to 70psi. Try those.

If no improvement go back to Roush and tune the MAF. If you get stumbles or surging you know you will have to tune the injectors.

I think Autozone rents (for free) fuel pressure gauges.

How are you guys doing the MAF 2 LOAD calculations? I'm not getting it to work.

 

[tdstuart]

The lack of detail in your posts is a dead giveaway. Nothing personal Tristan, just an observation and pattern I see. We need to keep it real for real results.
Now we just learn you're not running an OEM fuel pump…….

As far as you pointing out “3 different opinions”, you opened Pandora’s box with this thread.

I've mentioned all the changes I've made to the tunes every time I upload them, I just don't feel the need to list out the 30+ changes from stock every time I post a tune or post a log.

What more detail do you think I should add? The R# represents I've made changes since the last R#. If the changes are important I say what they are when referencing logs. Hence the here is the 1st set of Roush data I was using, here is ford data multiplied, here is the raw ford data, here is a 2nd set of roush data.

Here's all the categories i've changed:

As far as you pointing out “3 different opinions”, you opened Pandora’s box with this thread.

Because the fact that lu47 injectors are probably the most popular injector for our cars and we have many mixed opinions floating around about what data to use for them is crazy. Why isn't there a clear answer on if the Ford data needs converting, why don't the roush datas match, why don't the roush datas match the ford data.

If everyone is saying the injector data is very important, but no one can agree on what the injector data should be, then it makes it impossible for me to feel confident about the data I have.

To add to this I got an 08 gt500 file that has a slightly different version of the lu47 injectors and it has partially the same data as the ford data sheet but then Injector Offset Mult vs. Pressure and Injector Offset vs IGNV and Flow Rate Low/High are different.

 

[Mike Pfeifer]

So am learning that if I want to start tuning my car myself using pcmtec (or hpt or anything really), that I’m best off doing one change at a time and getting that to work and move on to the next instead of like 9 things at once.

 

[tdstuart]

With the DW400 we have no idea what FP you are actually running. I emailed you a 2009 GT500 cal. It is scaled for 39 base FP but ranges from 20psi to 70psi. Try those.

If no improvement go back to Roush and tune the MAF. If you get stumbles or surging you know you will have to tune the injectors.

I think Autozone rents (for free) fuel pressure gauges.

How are you guys doing the MAF 2 LOAD calculations? I'm not getting it to work.

Ill try those.

Here is the MAF 2 Load calculation based off what engineermike said on hptuner forums. The thing is picky about number multiplaction so you have to use parenthesis.

MAF 2 Load: ([50040.74]*60) / ([50070.56]*0.00167) / 4

I think Autozone rents (for free) fuel pressure gauges.

I just don't know how to see fuel pressure at wot unless load doesn't matter then I can just free rev.

 

[tdstuart]

So am learning that if I want to start tuning my car myself using pcmtec (or hpt or anything really), that I’m best off doing one change at a time and getting that to work and move on to the next instead of like 9 things at once.

Preferably you would do your base stuff to get the car to run (maf, injector, etc.).

Then do more changes and log to see that the car is behaving how you expect. Change, log, repeat.

If we didn't have to deal with this injector bs then we would be on to working out kinks, making the car faster, fixing my 3->4 paddle shift issue, etc.

 

[K4fxd]

I just don't know how to see fuel pressure at wot unless load doesn't matter then I can just free rev.

I use duct tape and tape the gauge to the windshield and do a 3rd gear pull.

I agree 100% on the LU47's. There should be a known set of parameters. I think the data is correct for the set that was used to get the numbers.

I personally think the injectors themselves have a very wide tolerance and this is the reason for so many differing sets of info.

 

[GregO]

I've mentioned all the changes I've made to the tunes

I’m not talking strictly tune changes.

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