weird issue at high speeds after OFT tune - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kuros · 07-22-2014, 02:12 AM

what elevation are you at when doing this?

slofrs · 07-22-2014, 12:41 PM

Sea level

Shiv@Openflash · 07-22-2014, 01:13 PM

FWIW, we don't make any changes to speed limits in our OTS maps. But I don't see why anything should be intervening at 110mph.

ML · 07-22-2014, 03:02 PM

Quote:

Originally Posted by MstrSHAKE

Dont mean to bump an old thread, but I just ran into this issue as well on my stage 1 flash. was at 6th Gear 99mph and then just hit a wall like fuel cut? Odd. Would not happen in 5th or 4th gear like the OP.

exact same happened to me. Pulled back on the throttle, and tried again and it didn't do it the second time. weird.

slofrs · 07-22-2014, 03:59 PM

i will see if i can get a log of it tonight

NyC Zn6 · 07-28-2014, 06:36 AM

same thing happened to me last night got up to 120 but it felt like a fuel cut. before i could go past 120 with ease. anymore info on this? im on stg2 el e85 tune if that helps.

steve99 · 07-28-2014, 07:06 AM

Quote:

Originally Posted by NyC Zn6

same thing happened to me last night got up to 120 but it felt like a fuel cut. before i could go past 120 with ease. anymore info on this? im on stg2 el e85 tune if that helps.

If you guys could log the problem it might help to work out what the issue is suggest

throttle
load
ignition advance
speed
fuel pressure
injection volume ml
AFR
FLKC
IAM
knock correction

SpeedWi · 08-10-2014, 12:32 PM

Just want to chime in too. I had the same issue as above at 100mph around 4k. yesterday. running Stg 1 93 2.0 tune. Sorry no logging done yet.

Td-d · 08-10-2014, 01:52 PM

I'm going to take a wild guess and say this happens between 3500 RPMs and 4000 RPMs?

EDIT: from at least two reports on here, 4000 RPMs is indeed the magic spot.

Over and above the SI mode throttle speed cut tables, there are two tables that are RPM based - hysteresis between 3500 and 4000. I don't think I've heard of anybody hitting these limit before (at least on the Subarus), but then again, not many people cruising at those speeds.

If you want, I can add these to the definitions, and you can test the theory out.

JB86'd · 08-10-2014, 07:35 PM

I'm on the 91 oct. Stage 2 maps...got up to 106mph with no hesitation today..think I was in 5th gear though.

Chimera · 08-10-2014, 09:49 PM

Not sure I'd personally call this an issue as much as observed behavior. personally at least.

Quote:

Originally Posted by SpeedWi

Just want to chime in too. I had the same issue as above at 100mph around 4k. yesterday. running Stg 1 93 2.0 tune. Sorry no logging done yet.

08-10-2014, 07:35 PM	#24
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)	I'm on the 91 oct. Stage 2 maps...got up to 106mph with no hesitation today..think I was in 5th gear though. __________________

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07-22-2014, 02:12 AM	#15
Kuros Senior Member Join Date: May 2014 Drives: 2014 FRS Raven. 2011 sti red (gone) Location: United States Posts: 156 Thanks: 18 Thanked 40 Times in 28 Posts Mentioned: 0 Post(s)	what elevation are you at when doing this?

07-22-2014, 12:41 PM	#16
slofrs Member Join Date: Sep 2013 Drives: Hot Lava FR-S Location: Lakeland, FL Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 5 Post(s)	Sea level

07-22-2014, 01:13 PM	#17
Shiv@Openflash Senior Member Join Date: Sep 2013 Drives: 2013 FRS Location: SF, CA Posts: 2,629 Thanks: 1,055 Thanked 5,470 Times in 1,494 Posts Mentioned: 605 Post(s)	FWIW, we don't make any changes to speed limits in our OTS maps. But I don't see why anything should be intervening at 110mph.

07-22-2014, 03:59 PM	#19
slofrs Member Join Date: Sep 2013 Drives: Hot Lava FR-S Location: Lakeland, FL Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 5 Post(s)	i will see if i can get a log of it tonight

07-28-2014, 06:36 AM	#20
NyC Zn6 Senior Member Join Date: Apr 2013 Drives: 10 Series #974 6m/t Location: NYC Posts: 1,956 Thanks: 1,358 Thanked 1,141 Times in 669 Posts Mentioned: 6 Post(s)	same thing happened to me last night got up to 120 but it felt like a fuel cut. before i could go past 120 with ease. anymore info on this? im on stg2 el e85 tune if that helps.

08-10-2014, 01:52 PM	#23
Td-d Garden variety obsessive Join Date: Oct 2013 Drives: 2009 Sti Hatch; 2015 Audi RSQ3 Location: South Africa Posts: 532 Thanks: 54 Thanked 448 Times in 245 Posts Mentioned: 74 Post(s)	I'm going to take a wild guess and say this happens between 3500 RPMs and 4000 RPMs? EDIT: from at least two reports on here, 4000 RPMs is indeed the magic spot. Over and above the SI mode throttle speed cut tables, there are two tables that are RPM based - hysteresis between 3500 and 4000. I don't think I've heard of anybody hitting these limit before (at least on the Subarus), but then again, not many people cruising at those speeds. If you want, I can add these to the definitions, and you can test the theory out.

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