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

Wayno · 08-10-2016, 10:36 PM

Be aware when you change CL scale, particularly at the top over 40g/s, it will change the LTFT in open loop.

People worry far too much about fuel trims at idle and other irrelevant low load situations where AFR is a steady 14.7.

You can scale OL for 0 LTFT with tools, but then you have to know how to tune the middle of the scale to generate 0 LTFT reliably when actually driving the car. That's the hard part.

08-10-2016, 10:36 PM	#536
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 896 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	Be aware when you change CL scale, particularly at the top over 40g/s, it will change the LTFT in open loop. People worry far too much about fuel trims at idle and other irrelevant low load situations where AFR is a steady 14.7. You can scale OL for 0 LTFT with tools, but then you have to know how to tune the middle of the scale to generate 0 LTFT reliably when actually driving the car. That's the hard part. __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales