OFT OTS 91 vs. 93 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

SIM10 · 11-21-2015, 05:26 PM

Quick question; if I only have 92 octane gas available in my area, is it better to use the 91 OTS tune, or the 93? Does it even matter being 1 octane point off? I want to get the most performance out of it that I can, but obviously don"t want to damage the engine.
I'm at stage-1 no header yet BTW.

phrosty · 11-21-2015, 05:38 PM

You could always mod the tune yourself to be somewhere in between. That said, the difference between the 91 and 93 tunes isn't enough to notice without a dyno. Your butt won't be any less happy if you just stuck with 91.

elBarto · 11-21-2015, 06:00 PM

There isn't much difference between the 91 and 93 tune. Only above 6000rpm I believe. If you want to flash and forget take the 91, otherwise take the 93, log and edit to your liking. Somewhere on this forum is a videotut how to do this. Also read Steve99's and Wayno's topics for more info about adjusting Rom's.

send using the coffeemaker

ryoma · 11-21-2015, 08:18 PM

if you want to be on the safe side, use the 91 tune. I am not sure about the actual power difference between the 91 and 93 tune, but you will give yourself some safe room to work with on the 91 tune.

riboyster · 11-21-2015, 08:31 PM

I'd use a 93 tune. Your car will pull the appropriate timing out of your IAM. I'm running a custom 91 Oct tune on my 89 Oct e0.
I only have had problems in 2 areas which I've adjusted and now have an average IAM of 0.98

riboyster · 11-21-2015, 08:33 PM

Alternatively, I can tune it for you if you'd like.

SIM10 · 11-21-2015, 09:55 PM

Quote:

Originally Posted by riboyster

I'd use a 93 tune. Your car will pull the appropriate timing out of your IAM. I'm running a custom 91 Oct tune on my 89 Oct e0.
I only have had problems in 2 areas which I've adjusted and now have an average IAM of 0.98 Alternatively, I can tune it for you if you'd like.

I have to admit I don't understand the finer points of tuning, IAM values, etc. Are you saying that you could create a 92 octane file?

riboyster · 11-21-2015, 10:02 PM

Sure. It'd involve you making log files for me though

SIM10 · 11-21-2015, 10:23 PM

Thanks, that would be great. Unfortunately I live in a somewhat colder climate than you do and the BRZ is in storage for the winter. Does the offer stand until spring?

riboyster · 11-21-2015, 10:56 PM

Sure just remind me!

11-21-2015, 05:26 PM	#1
SIM10 Member Join Date: Jun 2014 Drives: 2014 WRB BRZ Limited Location: Imperial, PA Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 1 Post(s) Tagged: 0 Thread(s)	OFT OTS 91 vs. 93 Quick question; if I only have 92 octane gas available in my area, is it better to use the 91 OTS tune, or the 93? Does it even matter being 1 octane point off? I want to get the most performance out of it that I can, but obviously don"t want to damage the engine. I'm at stage-1 no header yet BTW. __________________ Current Mods: Perrin Performance 2.5" Stainless Cat back Exhaust, STI Red Start button, STI Gurney Flap, F1 Fourth Brake light Kit, APR CF Splitter, Side Skirts, Rear Diffuser, Hotchkis Strut tower Brace, TWM Performance Short Throw Shifter & M1 Abrahams Stainless knob, PowerHouse Racing intake, Shrader Performance Rear Seat Delete, Helix Smoked side markers, Diode Dynamics LED Fogs, Interior, Tail as Turn & DRL Always On

11-21-2015, 05:38 PM	#2
phrosty Senior Member Join Date: Apr 2013 Drives: 2013 FR-S Location: Seattle Posts: 806 Thanks: 202 Thanked 321 Times in 199 Posts Mentioned: 18 Post(s) Tagged: 1 Thread(s)	You could always mod the tune yourself to be somewhere in between. That said, the difference between the 91 and 93 tunes isn't enough to notice without a dyno. Your butt won't be any less happy if you just stuck with 91. __________________ 2013 Whiteout 6AT FR-S \| Perrin Inlet Tube + 2.75" CAI \| OpenFlash Header \| P&L Catback \| 4.88 Final Drive \| Dialed in OFT 2.0x Stage 2 E85 \| 18x8 Enkei Raijin + 225/40 Michelin Pilot Super Sport \| 17x7 Stock + 215/45 Michelin X-Ice Xi-2

11-21-2015, 08:18 PM	#4
ryoma Senior Member Join Date: Mar 2015 Drives: 2015 Subaru BRZ Limited CWP Location: SoCal Posts: 1,561 Thanks: 34 Thanked 669 Times in 469 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	if you want to be on the safe side, use the 91 tune. I am not sure about the actual power difference between the 91 and 93 tune, but you will give yourself some safe room to work with on the 91 tune. __________________ My 2015 CWP BRZ Build

11-21-2015, 08:31 PM	#5
riboyster Senior Member Join Date: Aug 2015 Drives: 2013 Scion FRS Location: Maui, HI Posts: 387 Thanks: 143 Thanked 112 Times in 95 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	I'd use a 93 tune. Your car will pull the appropriate timing out of your IAM. I'm running a custom 91 Oct tune on my 89 Oct e0. I only have had problems in 2 areas which I've adjusted and now have an average IAM of 0.98 __________________ ScreamingElectron - SnakeShit

11-21-2015, 08:33 PM	#6
riboyster Senior Member Join Date: Aug 2015 Drives: 2013 Scion FRS Location: Maui, HI Posts: 387 Thanks: 143 Thanked 112 Times in 95 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Alternatively, I can tune it for you if you'd like. __________________ ScreamingElectron - SnakeShit

11-21-2015, 10:02 PM	#8
riboyster Senior Member Join Date: Aug 2015 Drives: 2013 Scion FRS Location: Maui, HI Posts: 387 Thanks: 143 Thanked 112 Times in 95 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Sure. It'd involve you making log files for me though __________________ ScreamingElectron - SnakeShit

11-21-2015, 10:23 PM	#9
SIM10 Member Join Date: Jun 2014 Drives: 2014 WRB BRZ Limited Location: Imperial, PA Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thanks, that would be great. Unfortunately I live in a somewhat colder climate than you do and the BRZ is in storage for the winter. Does the offer stand until spring? __________________ Current Mods: Perrin Performance 2.5" Stainless Cat back Exhaust, STI Red Start button, STI Gurney Flap, F1 Fourth Brake light Kit, APR CF Splitter, Side Skirts, Rear Diffuser, Hotchkis Strut tower Brace, TWM Performance Short Throw Shifter & M1 Abrahams Stainless knob, PowerHouse Racing intake, Shrader Performance Rear Seat Delete, Helix Smoked side markers, Diode Dynamics LED Fogs, Interior, Tail as Turn & DRL Always On

11-21-2015, 10:56 PM	#10
riboyster Senior Member Join Date: Aug 2015 Drives: 2013 Scion FRS Location: Maui, HI Posts: 387 Thanks: 143 Thanked 112 Times in 95 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Sure just remind me! __________________ ScreamingElectron - SnakeShit

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