Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - OFT Advance Multiplier will not increase from 0.7

G-Force · 09-02-2021, 01:45 PM

Hi All…. long time lurker, first time poster. I’m used to tuning with jets and timing lights on BMW M10 engines, so this type of tuning is all new to me.

My question: I have had the OFT V4.03 Stage 1 petrol tune installed for a couple weeks now. Looking at live data, the Advance Multiplier has never moved from 0.7. Trying to understand how the ECU decides to move that number closer to 1.0. I understand the default is currently set at 0.7, but had hoped it would move up as the ECU does some learning.

My Car:
-2018 US Market BRZ (50th Anniversary Edition).
-Drop in HKS air filter, Berk catted front pipe. No other engine mods.
-Running Premium 91 octane with a bottle of Royal Purple octane boost. Car is in Colorado Springs at 6,400ft (1950meters) elevation so it needs intervention to keep from running rich and knock should be less of a problem.

Logs:
Below are 3 logs from yesterday. Mostly driving around town with a couple 2nd gear pulls, and one interrupted 3rd gear pull.
I can see a few times the FLKC goes positive even all the way to +1, and there is no instances of Knock Correction on any of the logs.

https://datazap.me/u/g-force/septemb...ta=1-4-5-12-13
https://datazap.me/u/g-force/septemb...data=1-4-12-13

Why don’t I get an improvement on Advance Multiplier beyond 0.7?

09-02-2021, 01:45 PM	#1
G-Force Junior Member Join Date: Aug 2021 Drives: 2018 50th Anniversary Edition Location: Colorado Posts: 5 Thanks: 0 Thanked 3 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	OFT Advance Multiplier will not increase from 0.7 Hi All…. long time lurker, first time poster. I’m used to tuning with jets and timing lights on BMW M10 engines, so this type of tuning is all new to me. My question: I have had the OFT V4.03 Stage 1 petrol tune installed for a couple weeks now. Looking at live data, the Advance Multiplier has never moved from 0.7. Trying to understand how the ECU decides to move that number closer to 1.0. I understand the default is currently set at 0.7, but had hoped it would move up as the ECU does some learning. My Car: -2018 US Market BRZ (50th Anniversary Edition). -Drop in HKS air filter, Berk catted front pipe. No other engine mods. -Running Premium 91 octane with a bottle of Royal Purple octane boost. Car is in Colorado Springs at 6,400ft (1950meters) elevation so it needs intervention to keep from running rich and knock should be less of a problem. Logs: Below are 3 logs from yesterday. Mostly driving around town with a couple 2nd gear pulls, and one interrupted 3rd gear pull. I can see a few times the FLKC goes positive even all the way to +1, and there is no instances of Knock Correction on any of the logs. https://datazap.me/u/g-force/septemb...ta=1-4-5-12-13 https://datazap.me/u/g-force/septemb...data=1-4-12-13 Why don’t I get an improvement on Advance Multiplier beyond 0.7?