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Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ


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Old 03-05-2022, 10:49 PM   #15
Sam86
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I have in the past also noticed that e85 doesn't give that sudden punch in acceleration once I hit 4.5k rpm. When on the stock tune, it almost feels like vtec kicks in at that point lol.

E85 probably does pull harder at lower rpms, but for some reason gas feels like it has more grunt from a stop to me. Could be because E85 tune is smoother giving me the impression that it is not pulling as hard. Going to test it again on my next tank.

I'm also assuming OFT tunes are geared towards UEL headers, which could explain what I feel since I have Tomei EL headers. Might consider ecutek if it wasn't for California's new law that requires stock tune for SMOG.
Don’t know if it’s the same for you, but gas might feel like it has more grunt due to the change in exhaust tone.

For me after switching to e85 I noticed my exhaust was a lot more subdue. Sounded smoother compared to gas which would burble and sound louder.

I’m fully catless at the moment yet I still remember being more cautious of how loud my car was (when avoiding police) when I was on gas with my stock front pipe. Even if I rev up to 5k and let off I get no burbles
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Old 03-06-2022, 07:25 PM   #16
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Donít know if itís the same for you, but gas might feel like it has more grunt due to the change in exhaust tone.

For me after switching to e85 I noticed my exhaust was a lot more subdue. Sounded smoother compared to gas which would burble and sound louder.

Iím fully catless at the moment yet I still remember being more cautious of how loud my car was (when avoiding police) when I was on gas with my stock front pipe. Even if I rev up to 5k and let off I get no burbles
Agree 100%. I just switched back to the Oft e85 tune yesterday and was surprised at how much smoother the exhaust note is compared to gasoline tune and revving it in my garage is noticeably quieter.
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Old 03-07-2022, 05:15 AM   #17
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it s mostly cause of more advanced ignition timing
it tames the deepening of the sound while increasing power

For any of you that is using OTS E85 tunes... You still have a lot of headroom everywhere if you only were using custom refined tune
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Old 03-07-2022, 01:12 PM   #18
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it s mostly cause of more advanced ignition timing
it tames the deepening of the sound while increasing power

For any of you that is using OTS E85 tunes... You still have a lot of headroom everywhere if you only were using custom refined tune
So there's still potential for OTS users to get more out of the tune? Is that something a local shop could do? Or should we reach out to Openflash directly?
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Old 03-07-2022, 02:15 PM   #19
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yes, but don t waste time with Shiv, steve99 or Wayne are better

i can also modify it for you, up to you
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Old 03-07-2022, 05:52 PM   #20
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Hello everyone,

Iím the second owner of the 2014 BRZ and bought it at 70k. Before me it was only run on 91; however, I switched to corn at 72k and ran it exclusively on the OFT Stage2+e85 map (no flex fuel). I did not notice any power losses and was able to take the car to official drag races down at Race Legal in Qualcomm Stadium; although I canít remember my specific time, I did win 1st place street stock (I beat a V6 mustang by the smallest margin possible). At roughly 87k I added a sprintex supercharger and went with an ecutek flex tune from Mike over at Moto-East/Xero Limit; I still havenít ran 91 as Iíve only been on e85 and I am now at 118k and going. If it helps, I change my oil (Schaffers) every 3k and switch between 0w20 in the winter/colder months and 0w40 in the summer/hotter months; I occasionally (like once a month if I remember) run a serving of the lucas oil e85 conditioner/stabilizer to hopefully prevent the fuel system from being gummed up as some people claim may happen. The vehicle is used for everything if anyone is curious (daily, track, autocross)

To summarize:
72k on 91
15k on e85 NA
31K on e85 boosted
Total: 118k on stock block with 72k on 91 and 46k on e85
I have attached the link for the product I use

https://www.autozone.com/fuel-and-en...E&gclsrc=aw.ds
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Old 03-13-2022, 06:14 PM   #21
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Just curious, has anyone running flex fuel with forced induction in a CARB-compliant state successfully passed emissions?
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Old 03-20-2022, 08:26 PM   #22
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Just curious, has anyone running flex fuel with forced induction in a CARB-compliant state successfully passed emissions?
Not gonna happen ever
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Old 04-21-2022, 08:07 PM   #23
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Not gonna happen ever
So why not? Is it because a tuned, forced induction FA20 will produce more emissions and therefore it would exceed allowable amounts or because the emissions would be so much lower than the test would "expect" to see and fails because the assumption is that something else must be wrong to result in lower numbers. I'm not trying to be argumentative, I literally just don't know. I'm going on the high-level assumption that using flex fuel = lower emissions, but I have no idea how forced induction affects that assumption in practice.
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Old 04-21-2022, 08:36 PM   #24
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Just curious, has anyone running flex fuel with forced induction in a CARB-compliant state successfully passed emissions?
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Originally Posted by vfrqqq View Post
So why not? Is it because a tuned, forced induction FA20 will produce more emissions and therefore it would exceed allowable amounts or because the emissions would be so much lower than the test would "expect" to see and fails because the assumption is that something else must be wrong to result in lower numbers. I'm not trying to be argumentative, I literally just don't know. I'm going on the high-level assumption that using flex fuel = lower emissions, but I have no idea how forced induction affects that assumption in practice.
Carb only applies to CA. CARB=California Air Resource Board. I do our emissions certifications at work. For carb it would have to be a carb certified setup. So unless the manufacturer is going to pay for the testing($$$) and apply for the cert there isn't such a thing. It would also be a locked tune due to that.

The only way to know in your area is to run the car at an emission test facility and see if it passes.
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Old 04-22-2022, 01:17 PM   #25
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Just curious, has anyone running flex fuel with forced induction in a CARB-compliant state successfully passed emissions?
hypothetically doable if you have "a guy" and $$$ to potentially spend
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Old 04-25-2022, 06:59 PM   #26
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hypothetically doable if you have "a guy" and $$$ to potentially spend
I think you will need to add some more $ to that to get done.
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Old 05-06-2022, 05:05 PM   #27
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2014. 55,000 miles. About 15,000 on E85. Borla header, Berk free-flow cat front pipe, Phantom electric supercharger (Switched off right now till I can find the boost leak.) Strong, linear pull through the full torque range. Significant improvement over stock.
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