Ignition Advance/Timing Help

danmartinic · #21

Wow that's a lot of mods. Has it ever felt proper response-wise?

With so many modifications, you're obviously getting better performance somewhere.. such as more horsepower or faster 1/4 mile... but frankly, I have driven cars that were technically slow yet felt way more fun to drive.

I assume this is the 'response' you are complaining about. For example, I can't confirm, but I've heard (and read in period magazines even) that NA 944s are more responsive and fun at lower speeds around town than 951s.

You do have a big turbo so maybe that takes a while to get going

Spencan · #22

yes, it has felt proper as far as response goes. This feeling is a more recent trend. I have found culprits i.e. boost leaks. The turbo has a billet compressor wheel so it actually spools faster than the stock one that it was built from; I can hear it and used to be able to feel it about 200-300 rpm sooner than before.

danmartinic · #23

Ahh sorry.. thought it never felt right. Missed the changes you made (ignition timing) and boost leaks

Should be easy.. just go back to what you had before?

Spencan · #24

So I planted my foot in 1st gear and took it low 6000's RPM with no issues and it felt good. Then I shifted to 2nd and planted my foot again but around 4000 RPM it felt like boost cut out. Here's the log:

Spencan · #25

I stopped at the stoplight and repeated the same sequence, and I got the same result in 2nd gear. After checking the logs, it looks like the injectors are cutting the pulse almost in half all of sudden! My boost cut out is set to 18.5 psi on my EBC so I am little confused as to what is happening. Here's the 2nd log:

SirLapsalot · #26

Hey Spencan, is your Focus 9 SW able to output a .csv file? If so could you attach that instead? That would make viewing your data far easier.

Spencan · #27

Yes, but this won't allow me to upload a csv file.

#28

Spencan wrote: ↑Tue May 23, 2023 7:59 pm Yes, but this won't allow me to upload a csv file.

I'll see if I can allow for cvs files...

In the meantime, I'd turn down the boost. That first run was over 18psi of boost with the AFRs up into the 14's, which puts the HG at risk. I'll study it more in the morning and looks for clues. Do you have a 3 Bar fuel pressure regulator with stock injectors?

Curious when and where you got your a-tune, and do you have any way to edit the fuel maps?

#29

Spencan wrote: ↑Tue May 23, 2023 7:59 pm Yes, but this won't allow me to upload a csv file.

Hey Spencer, not sure what your csv actually looks like when viewing it, but if it's materially different from the pdf you've already posted, save the csv as a pdf and then post that.

Alternately, upload your csv or Excel doc to Drive (it will convert to a Google Sheet file), make the file sharable and then copy/paste the resultant link into your Carpokes post.

It will be like this: viewtopic.php?t=1605

#30

I just updated the allowable extensions to include cvs files, I think. If it still won't take them, let me know.