Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - MAF Scaling

Spuds · 04-27-2017, 11:10 PM

Hey folks. Followed the instructions in the first post to scale my MAF as I was seeing LTFT of +5 to +10. The vgi scaling program worked great for closed loop. Though it resulted in a slightly bumpy scale, my LTFT was down to +-3%.

Open loop scaling, on the other hand was quite wavy, and the transition showed the 3V lump folks were talking about back on page 8 of this thread. I cant seem to follow the logic/conversation and stopped trying a few pages in, but it seemed like it involved having to first get the injectors set correctly?

I know it was discussed in a number of threads back in 2014-ish, but if anyone could explain the consensus reached about why this happens and if I should/how I can get the scaling on the upper end right, I would very much appreciate it.

Just FYI: Stock engine, OFT, and Perrin inlet tube (because sound generator was annoying) in case that matters.

04-27-2017, 11:10 PM	#574
Spuds The Dictater Join Date: Apr 2017 Drives: '13 Red Scion FRS Location: MD, USA Posts: 9,662 Thanks: 26,713 Thanked 12,718 Times in 6,301 Posts Mentioned: 88 Post(s) Tagged: 0 Thread(s)	Hey folks. Followed the instructions in the first post to scale my MAF as I was seeing LTFT of +5 to +10. The vgi scaling program worked great for closed loop. Though it resulted in a slightly bumpy scale, my LTFT was down to +-3%. Open loop scaling, on the other hand was quite wavy, and the transition showed the 3V lump folks were talking about back on page 8 of this thread. I cant seem to follow the logic/conversation and stopped trying a few pages in, but it seemed like it involved having to first get the injectors set correctly? I know it was discussed in a number of threads back in 2014-ish, but if anyone could explain the consensus reached about why this happens and if I should/how I can get the scaling on the upper end right, I would very much appreciate it. Just FYI: Stock engine, OFT, and Perrin inlet tube (because sound generator was annoying) in case that matters.