E85 Tune W/OE Fuel System

Tractionless

Is anyone running E85 with a full OE fuel system and basic intake/exhaust mods?

I read in another forum +20 hp increase just from fueling with E85 and tuning it but never got a response as to what supporting fuel mods. Are required.

Thanks for any help you can lend.

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Toys Not Tots

Chuck33079

I was under the impression you needed slightly larger injectors and a fuel pump since E85 needs a lot more fuel volume to be delivered.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

projectpanda

if you are staying N/A and want to go E85, the only thing you need are injectors, most popular being GTR injectors. If going boost you'll need a bigger pump.

Uprev will allow you to switch between E85 and 93/91 but you'll have to empty the tank as much as possible. If you are on Ecutek, you need the ethanol sensor and slight rerouting of the fuel line. Specialtyz has a kit for N/A folks going flex fuel.

https://www.specialtyz.com/370z-g37/...-fuel-kit.html

chuckie311

you will need injectors and Flex Fuel Kit.. i was just tuned for E85 picked up 14whp and 9wtq

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Tuned by (Seb@Specialty-Z)
2011 G37 Cam'd FBO 347whp 280wtq Corn Fed 4.08 Gears

SG4247

I just bought used GTR injectors off eBay for $100.

Then had a E85 tune and two gas tunes created using EcuTek.

If I get low on E85, I just pull into a station and switch to a gas map using the cruise select button.

My car runs best on E85 over any other gasoline type. Ran 12.82 @ 111 mph last friday.

Only negative is the fuel consumption with E85.

I love it! No nasty gas smell and great power.

As far as supporting mods, the minimum would be test pipes IMO.

Tractionless

Thanks for everyone's input!!

So is your only fuel mod the injectors and the rest of the system is OE?

If so what are your wideband AF ratios?

Thanks!!

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Toys Not Tots

SG4247

Yes, stock fuel system sans injectors.

In fact, you can retune it with the OE injectors for E85, but the injectors will be at 90% duty.

No need for a fuel meter, wiring etc.. unless you want that stuff.

Ive run the car in total stock form at 30% E85 and 70% 91 gas. I didnt see any high EGTs or any knock issues. Now the A/F was off some and power was down, but it ran and drove fine.

Think I'm nuts?

Gains from E85 (ethanol) on an N/A bolt on 370Z

hurahn

So why didn't you go flex fuel? It's available and it works.

Sent from my SM-N960U1 using Tapatalk

Tractionless

Nope ran it on another supercharged/N2O injected platform and enjoy it over the nasty exhaust smell of pump fuel. Which is most of the reason I’ve kept stock cats, secondary is exhaust sound.

Being my Z isn’t daily driven & E85 is everywhere locally, I’m in.

Are the GTR injectors plug and play or are harness pigtails or other insulators needed?

Thanks for the info!!

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Toys Not Tots

zer099

Yes, plug and play.

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2009 G37X | 326 AWHP | 264 AWTQ

SG4247

I am so lazy I didnt even replace the o-ring on the used GTR injectors.

I cleaned them with WD-40 and compressed air. Then I cycled each one using a 9 volt battery and a paperclip.

I then installed them into the intake manifold.

chuckie311

If you go E85 call Seb at Specialtyz and get his tune.. there is no map switching.. you can run E85 though 91 without issues

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Tuned by (Seb@Specialty-Z)
2011 G37 Cam'd FBO 347whp 280wtq Corn Fed 4.08 Gears

husam2012

If you're interested I have a set of GTR injectors laying around.

I just finished 3 G37s that I had tuned on E85. I've done both Flex fuel or just map switching between 93 and E85 and honestly the cost difference for Flex fuel is not worth it unless you're boosted.

For NA cars, gains of approx 8-15 whp can be realized but the torque difference in the low end is the best part of it.

Contact me If you have any questions, I'm a tuner for Ecutek.

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Creator of the GTR TT Conversion Kit, NA Record Holder (401WHP)
Ecutek Master Tuner (VQ37, VR30, VR38, B58, S55, S58)
BTWTuning