Ethanol blend - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

yzf219 · 11-13-2020, 01:47 AM

Hi guys,

Just read Shiv's post regarding e85 and how if we are N/A there isn't a necessity for e85 since our dynamic compression when N/A can't take full advantage of full e85, and ideally all we need is e40.

So my question is has anyone run e40 on the oft STG 2+ e85 maps? If so what was your experience in terms fuel economy, fuel trims, performance, cold starts etc...?

Also if e40 isn't an ideal blend, what blend would you recommend? I have a catless header.

The post I'm referring to https://r.tapatalk.com/shareLink/top...ink_source=app

Thanks

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EndlessAzure · 11-13-2020, 02:39 AM

Try not to run anything other than e85 on an e85 map. The engine is expecting e85, and will run rich unless the engine fuel trim can cover for it.

A few % off of 85 would probably be just fine, but I don't know enough about the engine to say that it can adjust for e40

If you care about running e40, blend it yourself an get a flex fuel kit.

gen3v8 · 11-13-2020, 03:59 AM

Quote:

Originally Posted by yzf219

Hi guys,

Just read Shiv's post regarding e85 and how if we are N/A there isn't a necessity for e85 since our dynamic compression when N/A can't take full advantage of full e85, and ideally all we need is e40.

So my question is has anyone run e40 on the oft STG 2+ e85 maps? If so what was your experience in terms fuel economy, fuel trims, performance, cold starts etc...?

Also if e40 isn't an ideal blend, what blend would you recommend? I have a catless header.

Thanks

Sent from my SM-G950W using Tapatalk

Can you quote his post for reference thanks. I have read a lot and may need a refresh, cos e40 sounds like shit fuel

yzf219 · 11-13-2020, 06:07 AM

Quote:

Originally Posted by gen3v8

Can you quote his post for reference thanks. I have read a lot and may need a refresh, cos e40 sounds like shit fuel

https://r.tapatalk.com/shareLink/top...ink_source=app

Sent from my SM-G950W using Tapatalk

gen3v8 · 11-13-2020, 06:58 AM

Cheers I remember it now.Good e85 is 105ron and runs 14:1 comp safely. 93ron runs 10.5:1 comp safely. Obviously with modern ecu`s you can push safety limits further. The fa20 is 12.5:1 so it would fall in between.

Nothing like having a nice anti knock safety margin with your fuel. For 2hp loss why run crappy fuel. !`m possibly a bit spoiled with our e85 its exxy but always e80+.

jflogerzi · 11-14-2020, 01:20 AM

Our Cars love E85. If you can do 1 mod and have reliable e85, Tune+Flex Fuel is all I would do+ Axleback for sound.

yzf219 · 11-14-2020, 01:33 AM

Quote:

Originally Posted by jflogerzi

Our Cars love E85. If you can do 1 mod and have reliable e85, Tune+Flex Fuel is all I would do+ Axleback for sound.

Yea I wasn't planning on e85 but after seeing the gains I'm certainly interested....

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jflogerzi · 11-14-2020, 01:34 AM

Quote:

Originally Posted by yzf219

Yea I wasn't planning on e85 but after seeing the gains I'm certainly interested....

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Get ecutek and flex fuel. 100% worth it

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yzf219 · 11-14-2020, 01:35 AM

Quote:

Originally Posted by jflogerzi

Get ecutek and flex fuel. 100% worth it

Sent from my GM1915 using Tapatalk

Already got the Ecutek haha.

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11-13-2020, 01:47 AM	#1
yzf219 Member Join Date: Sep 2020 Drives: 2013 FRS GTX3076R Location: Canada Posts: 79 Thanks: 54 Thanked 18 Times in 16 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Ethanol blend Hi guys, Just read Shiv's post regarding e85 and how if we are N/A there isn't a necessity for e85 since our dynamic compression when N/A can't take full advantage of full e85, and ideally all we need is e40. So my question is has anyone run e40 on the oft STG 2+ e85 maps? If so what was your experience in terms fuel economy, fuel trims, performance, cold starts etc...? Also if e40 isn't an ideal blend, what blend would you recommend? I have a catless header. The post I'm referring to https://r.tapatalk.com/shareLink/top...ink_source=app Thanks Sent from my SM-G950W using Tapatalk Last edited by yzf219; 11-13-2020 at 06:07 AM.

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11-13-2020, 06:58 AM	#5
gen3v8 30 minute maintenance Join Date: Oct 2020 Drives: My18 wrxsti Location: Botany Bay Posts: 1,178 Thanks: 769 Thanked 1,236 Times in 631 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Cheers I remember it now.Good e85 is 105ron and runs 14:1 comp safely. 93ron runs 10.5:1 comp safely. Obviously with modern ecu`s you can push safety limits further. The fa20 is 12.5:1 so it would fall in between. Nothing like having a nice anti knock safety margin with your fuel. For 2hp loss why run crappy fuel. !`m possibly a bit spoiled with our e85 its exxy but always e80+.

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