Nistune strange injection time issue

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Nistune strange injection time issue

Postby ilya240sx » Thu May 17, 2018 9:14 pm

Quick overivew of the car:
- S13 KA24DE
- T28 Turbo (wastegate pressure ~5-6 PSI)
- Stock KA24DE MAFS
- Subaru STI 550cc Injectors (1050uS latency)
- Looking to get 200HP
- S13 ECU with Type3 Feature Pack board

Im having an issue where the injection time is slow to catch up with the fuel map. When doing full throttle run, the AFRs stay lean until, what seems to be a random point, then step down and get to where they are supposed to be (see picture). At that "step" point, the car finally feels like it has power. Looking back at the log, you can see the injection time doing a massive step up (orange line), at which point AFRs richen up and get to where they are supposed to be (green line) and the car comes alive.

Has anyone ever encountered this?

Thank you

Image

Log and Tune:
S13_FP_Tune_Rev2.zip
My Tune
(20.66 KiB) Downloaded 8 times

Log_File.zip
Log File
(5.82 KiB) Downloaded 7 times
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Re: Nistune strange injection time issue

Postby p00t » Thu Jun 07, 2018 7:35 pm

What RPM does it happen? Check your TTPMAX settings versus the logs. Put that whole table to 255 and test again. You can change it later if you want.

Your knock maps are zeroed but your knock sensor is ON. Your fuel knock map is super lean... copy the fuel map between primary and secondary. I get the 0 timing so you know when you hit knock, but its not pleasant when you are driving in traffic or something and it occurs.... copy your primary map and take 4 degrees out or something like that. You can still see you had knock with your logs.
Last edited by p00t on Thu Jun 07, 2018 7:42 pm, edited 1 time in total.
KA24DETT still alive
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Re: Nistune strange injection time issue

Postby p00t » Thu Jun 07, 2018 7:37 pm

Also consider using an N60 maxima MAF. It will give you more stable AFR versus the G70 one and it is less restrictive.
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