Lyle_57IAL

Hey Guys !

Currently have a build z6 that has been tuned on pump fuel its whole life. Looking at changing to E85 and running a flex fuel setup with my S300 V3.

Currently running a Walboro 255 Pump & filter @ ID 1000cc injectors @ 55% duty cycle (Full boost & Rpm). Standard steel fuel lines, and rubber engine bay hoses, Oem fuel filter & oem Fuel pressure regulator.

As E85 is quite cursive - what will be the fuel system components i will need to change? and what will they need to be changed to?

Also is there any specific change over / run-in process to go from pump to e85 fuel ?

i.e. run 2 tanks of E85 - then change all filters?, due to the stripped debris of the factory fuel system being pushed downstream and blocking filters etc..

Any help would be great


ps - Also in regards to tuning, generally i am targeting around 11:0 on pump fuel full load / boost - generally with E85 do you target these mixtures or leaner values? i was reading around 12:0 ? rule of thumb

turbohatch96y7

iTrader: (15)

I have stock lines on my setup. No problems


Hondata I don't think can blend 91 and e85 properly I can be wrong but haven't seen a setup posted yet


As for your afr you target the same as you would for 91. your gauge reads lambda not stoich

Lyle_57IAL

^ Not sure what you mean - I run a innovate Lc1 wideband and it readys in AFR. So wouldn't you actually be targeting different mixtures with the E85 ? i have been reading that you run it leaner then pump fuel

turbohatch96y7

iTrader: (15)

No your wide band reads in lambda

The fuels do have different stoich readings. Thats not what your wideband reads tho.

Theres a few threads on it if you want the full info i might be wording it wrong

riceball777

I love my flex fuel setup. Out of all the mods that I have ever done in my whole life. Converting my turbo s2000 to flex fuel was my favorite mod of all time. No more draining tanks to switch from 91 octane to e85. No more change maps on the ecu. The ecu automatically adjusts timing and boost depending on the amount of ethonol in the fuel. A few other have this on the aem series 2. I do not believe I have seen anyone run this with hondata. I believe hondata has only because flex fuel compatable very recently.

As for your fuel system is fine. You don't have to change lines or anything. With your walbro 255 and 1000cc injectors will limit you max power to be only 500whp on e85.

As long as you have a flex fuel compatable ecu. It's real simple to setup. All you need is the gm flex fuel sensor which is about 70 bucks. You just run the sensor between the fuel retune line and the sensor has 3 whites. Switched power, ground and the 3rd wire you just run it into the ecu. For aem you put the wire into d12. I'm not sure about hondata.

turbohatch96y7

iTrader: (15)

Yup i have the v2 box too with the flex fuel sensor.

How many fillyps does it take for you to get all the 91 octane out and get full e85?

It took me 3

It went to e65 to e80 and just recently e90

OneBadTurboCRV

Guys... I have said many times that you CAN do it with HONDATA S300 v3 BUT it is globally applied. It is nowhere near the map blending capabilities of AEM or similar where two separate maps are blended. I have been using the E85 compensation since it came out on S300 V2. If you are a perfectionist, your tune will be off with the global maps. It's a hack at best - does it work? Sure. Is it ideal? Faaarrrr from it.

You don't need anything special to run E85 other than more frequent fuel filter changes. If you are worried then run a tank of regular gas every once in a while to lube things up. I have been running E85 in Hondas for close to 10 years now. It all started back in the day to pass emissions before anybody knew it's true purpose - pump gas race fuel LOL!!!

turbohatch96y7

iTrader: (15)

Untill i see some proof hondata can run both fuels like this
Thats when ill say " yes hondata can support flex fuel"

OneBadTurboCRV

LOL, then it's definitely never going to be able to support flex fuel by your standards. Like I said, it's a hack at best. According to Hondata's own posts on their forum, they are basically out of code and are very limited on any improvements they can make. Basically if you are looking for something more current without the hefty price tag then you want an AEM box or more involved MegaSquirt. I don't see why Hondata hasn't come out with something like a retro version of the FlashPro/K-Pro to get rid of the OBD-1 ECU limitations.

Ever since AEM V2 I have been heavily considering finally leaving the Honda based EMS. I know I should just do it already because I greatly desire true flex fuel without needing my computer to swap maps to make it ideal...

turbohatch96y7

iTrader: (15)

Well at the very least showing the ethanol going from e10 to e85 and the car still running

OneBadTurboCRV

Hmmm, I have never even tried that. That may be a good test when I get my turd up and running again. I usually will drive it down to 1/4 tank when I swap fuels. I am a 1/2 tank fuel up kind of guy, so 1/4 tank is stretching it for me LOL.

Lyle_57IAL

Very good feedback thanks mate ! yes quite right i am an perfectionist in regards to my fuel mixtures all over my map - everything from light throttle all the way to full tilt. However with a global trim - as long as at full load is is safe, thats all that matters (Light throttle mixtures would just be a bonus). It is very interesting though that S300 does incorporate Secondary tables as well as flex fuel (ethanol sensor) - but the didn't incorporate both functions together. Ie 1 map for pump 1 map for E85 and then the Sensor signal to interpolate between the two maps..... weird. But yes Old Ecu and electronics - its amazing what the hondata can do now given its nearly 20 year old technology..

wantboost

iTrader: (2)

the ecu just simply doesn't have the capabilities.

At minimum you'd need an AEM Series 2 EMS for true seamless flex fueling. I prefer the Megasquirt 3 Pro personally. Gives you way more ease of use and flexibility when tuning multiple maps, blending multiple maps, combining tables, etc