High negative FLKC values on the highway - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

RIP.S2000 · 12-18-2015, 12:37 AM

My motor and tune is stock, but I use the OFT to monitor IAM, FLKC, etc. It's about 50 degrees F tonight, and I'm getting negative FLKC values up to ~1.2 when moderately accelerating on the highway (throttle about half way). My IAM will stay at 0.70 and try to climb back up if I go WOT at high RPMs, but once it gets to ~0.90, negative FLKC kicks it back down.

I'm not sure if the gas I'm using isn't really 93 octane, or if there's something else wrong. I just had the front cover replaced because it was leaking oil, so they had to "re-silicone" it. I'm not sure if it's even related. The oil temps were around 212 F and coolant around 200 F. I wasn't able to log it as the traffic was really hectic, and I was in a hurry.

I'm paranoid, guys. I'd be grateful for any insight.

I'm about to use the stage 2 tune after I put on my headerback exhaust, but I'm afraid to do it if there's anything wrong internally. I don't wanna fight with Subaru.

Wayno · 12-18-2015, 02:01 AM

Working as intended.

RIP.S2000 · 12-18-2015, 02:29 AM

Quote:

Originally Posted by Wayno

Working as intended.

So there's nothing to worry about?

JB86'd · 12-18-2015, 04:28 AM

Well you COULD try some different 93 octane near you, but you're fine either way.

When you load the stage 2 tune, load the 93 octane tune, and if it's knocking in high RPM, you can try the 91 octane tune. The only difference is more timing in the upper rpms.

solidONE · 12-18-2015, 10:36 PM

Have you done any modification to the exhaust? Does this show up upon throttle tip in?

12-18-2015, 12:37 AM	#1
RIP.S2000 Member Join Date: Jul 2014 Drives: 2015 BRZ Series.Blue, ('00 S2000) Location: TX Posts: 80 Thanks: 88 Thanked 34 Times in 21 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	High negative FLKC values on the highway My motor and tune is stock, but I use the OFT to monitor IAM, FLKC, etc. It's about 50 degrees F tonight, and I'm getting negative FLKC values up to ~1.2 when moderately accelerating on the highway (throttle about half way). My IAM will stay at 0.70 and try to climb back up if I go WOT at high RPMs, but once it gets to ~0.90, negative FLKC kicks it back down. I'm not sure if the gas I'm using isn't really 93 octane, or if there's something else wrong. I just had the front cover replaced because it was leaking oil, so they had to "re-silicone" it. I'm not sure if it's even related. The oil temps were around 212 F and coolant around 200 F. I wasn't able to log it as the traffic was really hectic, and I was in a hurry. I'm paranoid, guys. I'd be grateful for any insight. I'm about to use the stage 2 tune after I put on my headerback exhaust, but I'm afraid to do it if there's anything wrong internally. I don't wanna fight with Subaru.

12-18-2015, 02:01 AM	#2
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 895 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	Working as intended. __________________ 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

12-18-2015, 04:28 AM	#4
JB86'd Senior Member Join Date: Oct 2013 Drives: JAWS Location: socal Posts: 703 Thanks: 753 Thanked 437 Times in 224 Posts Mentioned: 27 Post(s) Tagged: 1 Thread(s)	Well you COULD try some different 93 octane near you, but you're fine either way. When you load the stage 2 tune, load the 93 octane tune, and if it's knocking in high RPM, you can try the 91 octane tune. The only difference is more timing in the upper rpms. __________________

12-18-2015, 10:36 PM	#5
solidONE Senior Member Join Date: Dec 2012 Drives: FR-S Whiteout Location: California Posts: 2,863 Thanks: 1,808 Thanked 790 Times in 611 Posts Mentioned: 42 Post(s) Tagged: 0 Thread(s)	Have you done any modification to the exhaust? Does this show up upon throttle tip in? __________________ Intent > Content cowardice is the mother of cruelty.

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