FA20club.com E85 Preliminary Review

[stockysnail]

Originally Posted by WiKKiD

What software did you use. I have eurodyne maestro that I use to tune my TT. I love it that's why I can't wait for a standalone or do it yourself package that around $1200 bucks

It was the United Motorsports/Bluewater Performance E85 Stage 1 Kit and tune with 550cc injectors. It cost $775 and got everything done at Double J Motorwerks in NE Portland. Obviously it would be cheaper if you already have the injectors as they wouldn't have to install them or purchase them. The United Motorsport tune is regarded as the best tune out there by so many people and I would have to agree with everyone as I really liked it.

DoubleJ is favorite shop I've ever been to. I'm going to convince them to work on my BRZ if it ever needs anything since I like them so much.

[Yruyur]

Ecutek is already working on the flex fuel to detect octane. Also the race Rom on the current tune includes the launch control. Can't wait for flex fuel!!

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[Mars2]

Originally Posted by stockysnail

I had an VW R32 before my BRZ that had a e85 flash. The ecu would autodetect which gas I was using (e85 or premium) and adjust accordingly. I'm surprised this isn't the norm now. Is it a difference between the VW's ecu and Subaru's ecu making it not possible or have tuners just not made this happen yet?

The R32 did have issues starting in temps under 50f but just required a second try of turning key off then on to try again.

I averaged about 4-5mpg less on e85 but also gained about 45hp-ish (240hp 91oct to 285hp e85). This translated into spending a few bucks more at each fillup. e85 should give well tuned stock cars between 15-25% hp boost over 91-93 octane, which means the BRZ should get about 20hp or so just on a flash and using different gas.

I had to replace the fuel injectors with larger ones. I haven't read anywhere on here if the BRZ/FR-S needs larger ones. I would think it should since it needs to push more e85 in the engine than 91-93 octane to work properly.

I also had launch control added and autoblip added. Launch control is really only for drag racing so don't bother unless you do it and autoblip you should only really get if you're lazy in teaching yourself how to blip with your foot. After having it I prefer using my foot instead, especially since it's my daily driver.

I will only get e85 tune for my BRZ if it's an autodetect fuel map like my VW R32 was and if I do need to replace the injectors that they are easy to do myself without needing to rip the car apart to get to them (not sure where they are as I haven't looked it up).

Should be possible to get the BRZ/FR-S up to about 240hp if use e85, sport cat headers, sport cat down pipe, and exhaust.

I also still have R32 engine on my other car with flex fuel tune and 550cc injector.
Don't know why they can't do flex fuel on GT86 without adding ethanol fuel sensor. It got every thing it need from oem to make it flexfuel I mean wideband O2 ensor and knock sensor. just need to make it able to switch ignition advance map according to knock and widen fueling adaptation range. then learning will do it. Look like GT86 ECU is " retaded" compare to Bosch ME7 ECU from 2004 VWR32

[Yruyur]

Have about 100 miles on the tune getting pretty bad idle dips with the air conditioning on.

Pretty sure no one else noticed since they probably are not running their AC.

I thought it was going to stall a bunch of times last night.

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[tech4pdx]

Originally Posted by Yruyur

Have about 100 miles on the tune getting pretty bad idle dips with the air conditioning on.

Pretty sure no one else noticed since they probably are not running their AC.

I thought it was going to stall a bunch of times last night.

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Interested in knowing more about this as info becomes available. I will be receiving my E85 tune next week. I will test with A/C on and report back.

[CircuitJerk]

Originally Posted by Frostyman

No, radio presets will go boom.

Originally Posted by 2forme

Unfortunately, no, it does not retain them. But you'll have a working fuel gauge!

That wasn't my experience today. I disconnected the negative cable, cycled headlights, pressed the horn a couple times waited about 5 minutes and reconnected. All presets remained and my gas gauge returned to normal.

I know that it will wipe the aforementioned settings out if you go longer than that, but not sure how much longer.
I do know that when I replaced my intake tube and installed a strut bar, I lost everything, but that was at least one hour.

So, if you reset the ECU this way, you should be able to accomplish the goal without losing your head unit's presets. I am inclined to start messing with the option to get the analog gauge pissed again to see if the same can be accomplished in a shorter time.
I also think turning accessories on to hasten the discharge of any remaining power in components that retain a charge, hastens the process.

[JoeBoxer]

Might have to try that headlight & horn thing i left mine disconnected for about 6-7 minutes and it didn't do anything with the gauge.

[Yruyur]

Got 12.2 mpg at autocross today

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[JoeBoxer]

My gas gauge goes completely to E then jumps back to half a tank so the first run is just the first half of the tank lol.

[Yruyur]

Mine too. It will go from low fuel to 3/4.

Still having the idle dip very badly with the ac on. Had to not have it on thinking o was going to stall at red lights.

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[CircuitJerk]

Originally Posted by JoeBoxer

My gas gauge goes completely to E then jumps back to half a tank so the first run is just the first half of the tank lol.

That's bizarre!
I've been filling up every weekend and I know I've been using about about 3/8 to 1/2 tank each weekend and it stay's close to full the entire time. When I did the reset today, it went from 7/8 to just under a 1/2 tank which is where I would expect it to be.
I've been too chicken to run it down any further than that.

So, if I understand this correctly, the reset didn't work, but you let it go down to E and then at some point it bounced up to 1/2 a tank?
That sounds to me like the method for calculation is off by 25%?
:scratcheshead: I dunno, maybe I have the dumb?

[JoeBoxer]

Yeah this is the second time it happened and I only had 140 miles since fill up so I knew it wasn't empty. Not that big of a deal but have some really cold weather comin so I'll go back to 93 on the next fill up.

[xjohnx]

hmmmm... idea for a bandaid on the cold start issue, not sure how possible this would be or if it will even make sense, but maybe having the 4 switchable maps be identical, except vary the cold start paramaters on each map by +/-5-10% (or whatever interval makes the most sense).

i.e. (i have no clue what the correct terminology is here, so i'm making up my own.) -

Map 1 - Baseline cold start tables
Map 2 - Cold start fuel tables +5% fuel
Map 3 - Cold start tables +10% fuel
Map 4 - Cold start tables -5% fuel

At least that way you've got a couple different options to get going give you a little peace of mind that you're not going to get stuck somewhere.

[Yruyur]

So with my idle dip issue when the ac is on, what do you guys think of reflashing the ecu then keeping the ac on dusting the first idle and first 50 miles. I'm thinking since I didn't have it on it may have calibrated without the additional load.

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