Long-term effects of E85 - Page 6 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Pat · 12-09-2019, 06:00 PM

Quote:

Originally Posted by smg1138

Have you seen any kind of actual evidence of that? People like to talk a lot of trash on the internet, but I've never seen any proof of e85 having negative effects on our cars.

No, I have not. But a friend runs a race shop (well-respected, national-championship winning, etc.) and they do a lot of work on Subaru engines. He's seen it and has recommended strongly against using ethanol in FA20s.

kev0 · 12-09-2019, 08:12 PM

A VERY reputable tuner (probably the best for our platform) told me although stock injectors are 'ok' for E85, he wouldn't recommend it for long term use as it is hitting the limits and shortening the life span of my fuel system and will eventually cause engine failure. What should I upgrade besides the injectors?

new2subaru · 12-09-2019, 08:37 PM

Quote:

Originally Posted by kev0

A VERY reputable tuner (probably the best for our platform) told me although stock injectors are 'ok' for E85, he wouldn't recommend it for long term use as it is hitting the limits and shortening the life span of my fuel system and will eventually cause engine failure. What should I upgrade besides the injectors?

What exactly does that mean though? It's good for 50k 100k 200k?

new2subaru · 12-09-2019, 08:39 PM

Quote:

Originally Posted by Pat

No, I have not. But a friend runs a race shop (well-respected, national-championship winning, etc.) and they do a lot of work on Subaru engines. He's seen it and has recommended strongly against using ethanol in FA20s.

Hey Pat,

Same, seen what and why? E10 E50 E70 E85?

Pat · 12-09-2019, 10:32 PM

I don't have any more details for you unfortunately. I wish I did, sorry.

new2subaru · 12-09-2019, 10:48 PM

Quote:

Originally Posted by Pat

I don't have any more details for you unfortunately. I wish I did, sorry.

Thanks, Pat. It'll turn up.

Lantanafrs2 · 12-09-2019, 11:20 PM

What would make the fa20 unable to handle ethanol? Did they use new, unknown materials? I dont buy it.

kev0 · 12-09-2019, 11:30 PM

Quote:

Originally Posted by new2subaru

What exactly does that mean though? It's good for 50k 100k 200k?

...I actually have no idea. Depends on how often you run it I guess. My tuner just told me to switch injectors as soon as I can to prevent failure.

86TOYO2k17 · 12-10-2019, 12:13 AM

Quote:

Originally Posted by kev0

...I actually have no idea. Depends on how often you run it I guess. My tuner just told me to switch injectors as soon as I can to prevent failure.

These are two different issues. This thread is discussing long term negative effects from E85 and not about maxing injectors because boosted.
People are worried E85 will either destroy fuel lines or because it is hygroscopic it will cause rust to form inside the gas tank or engine.

What you are referring to is when boosted running around 300whp on E85 you are maxing out stock injectors and it is not good to be running over 90% duty cycle ideally you want to be at 80% allowing you to have both more room to spray more fuel incase you have more air/boost coming in for various reasons as-well as not over heating the injectors causing premature wear and failure. But this is less from the inherent nature of E85 and more from demanding more fuel from the system because you are boosted and E85 has less energy requiring more fuel.

kev0 · 12-10-2019, 01:31 AM

Quote:

Originally Posted by 86TOYO2k17

These are two different issues. This thread is discussing long term negative effects from E85 and not about maxing injectors because boosted.
People are worried E85 will either destroy fuel lines or because it is hygroscopic it will cause rust to form inside the gas tank or engine.

What you are referring to is when boosted running around 300whp on E85 you are maxing out stock injectors and it is not good to be running over 90% duty cycle ideally you want to be at 80% allowing you to have both more room to spray more fuel incase you have more air/boost coming in for various reasons as-well as not over heating the injectors causing premature wear and failure. But this is less from the inherent nature of E85 and more from demanding more fuel from the system because you are boosted and E85 has less energy requiring more fuel.

Ahh okay. My bad for the confusion. Are you running 700cc injectors for your setup?

86TOYO2k17 · 12-10-2019, 08:37 AM

Quote:

Originally Posted by kev0

Ahh okay. My bad for the confusion. Are you running 700cc injectors for your setup?

No, I am on stock injectors because i am not on E85. I use 92+WMI. I would listen to your tuner and go with whatever injectors he recommends, sooner would be best.

DarkSideFRS · 12-10-2019, 01:07 PM

Ok...lots of conflicting info here.... Assuming an N/A setup (prob with aftermarket headers), is it safe to run e85?

Pat says no with no evident proof, and some swear there are no issues at all in relation to the health of the fuel system and motor...

Grady · 12-10-2019, 01:25 PM

Running E85 will cause the engine to fail at some point! It may take 300k miles or so but it will eventually fail.

PulsarBeeerz · 12-10-2019, 01:35 PM

People having been running E85 since 2013 on this platform without problems. You always have someone say "My tuner said.." and they are always the best tuner somehow.lol Tuning engines and living with a platform day to day aren't the same. I saw one guy with bad DI seals blame it on E85 but they have been known to go on gasoline. and he also tracked on faulty coil-packs while on that E85..

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12-09-2019, 08:12 PM	#72
kev0 Senior Member Join Date: Feb 2018 Drives: '14 Location: Midwest Posts: 485 Thanks: 246 Thanked 99 Times in 76 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	A VERY reputable tuner (probably the best for our platform) told me although stock injectors are 'ok' for E85, he wouldn't recommend it for long term use as it is hitting the limits and shortening the life span of my fuel system and will eventually cause engine failure. What should I upgrade besides the injectors?

12-09-2019, 11:20 PM	#77
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,517 Thanks: 2,520 Thanked 3,088 Times in 1,654 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	What would make the fa20 unable to handle ethanol? Did they use new, unknown materials? I dont buy it.

12-10-2019, 01:07 PM	#82
DarkSideFRS Banned Join Date: Apr 2017 Drives: 2013 pearl white FR-S Location: Socal Posts: 536 Thanks: 39 Thanked 191 Times in 124 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Ok...lots of conflicting info here.... Assuming an N/A setup (prob with aftermarket headers), is it safe to run e85? Pat says no with no evident proof, and some swear there are no issues at all in relation to the health of the fuel system and motor...

12-10-2019, 01:35 PM	#84
PulsarBeeerz Senior Member Join Date: Mar 2017 Drives: JRSC BRZ SOLD Location: Ohio Posts: 934 Thanks: 676 Thanked 739 Times in 396 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	People having been running E85 since 2013 on this platform without problems. You always have someone say "My tuner said.." and they are always the best tuner somehow.lol Tuning engines and living with a platform day to day aren't the same. I saw one guy with bad DI seals blame it on E85 but they have been known to go on gasoline. and he also tracked on faulty coil-packs while on that E85..

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