E85 in CB7s

[DaXSi]

I currently run E85 in my WRX and am wondering if anyone has experimented with running it on CB7s.

Do the CB7 injectors have enough headroom to run a 30% blend of E85? Would the ECU have enough range to allow the fuel trims to compensate for it without throwing too lean CELs?(if the obd even has that code) I'm not sure if there would be an advantage to running on a stock NA F22A4 being that the turbos like the octane advantage and cooler charge temps which allows for more advance.

Anyones thought and experiences would be nice to hear.

[turbo90accord]

Without the proper tuning a car should never be using e85 unless it contains the ability to switch using airfuel ratio readings like the GM flexfuel vehicle. CB7s have very little leeway when it comes to switching fuels to e85, yes it may work but the car is going to run extreemly lean.

I have my CB on e85 but it required a FULL TUNE on hondata to get it to even run. on an NA cb you would need at minimum 400cc injectors for it to work propperly. There would be no power benefits from running e85 on an NA motor.

Also a CB would require much more than just its weak narrowband o2 sensor in order for it to regulate the airfuel ratio properly.

Has your WRX been tuned for e85?

[DaXSi]

Yes the WRX has been tuned with all the supporting mods nescescary for 100% E85.

The reason I ask is the Subaru ECUs fuel trims do allow for near a 50/50 mix of E85 and 91 before you run into too lean CELs. Then It's just a matter of injectors and pump and you can usually run 100% e85 relatively safely but yes a tune should be employed to fully benefit from it. The O2 sensor was something that hadn't ran through my head I seem to forget sometimes that turbo scoobs employ the semi wideband front O2 for adjusting fuel in closed loop.

I wasn't sure if the ECU tech in older hondas would allow for a light blend or not without having issues. I love the E85 in the WRX and since my CB is my daily I figured why not see what the survey around here says about it.

Is hondata the only option for chipping and tuning CB7 ECUs?

[LeosCB7h22]

what about an h22 turbo tuned on 91 octane. would running e85 hurt

[turbo90accord]

there are many options for chipping/tuning honda ecu's. chrome,AEM, Hondata, to name a few.

[DaXSi]

Turbos <3 E85, As long as you have the equipment to deliver the proper amount of fuel, Tuning is always a good idea as well.

Altho I dont know about hondas love for it, It could be a different world.

[DaXSi]

Figured I would post these articles in case anyone wants to read.

http://www.awdpirates.net/forums/vie...hp?f=20&t=4747

http://forums.nasioc.com/forums/showthread.php?t=803341

[DaXSi]

I have my CB on e85 but it required a FULL TUNE on hondata to get it to even run. on an NA cb you would need at minimum 400cc injectors for it to work propperly. There would be no power benefits from running e85 on an NA motor.

What are the flow ratings on the stock injectors?

[turbo90accord]

if i remember correctly i think they are 325cc

[turbo90accord]

just realized your in CO as well!

[DaXSi]

just realized your in CO as well!

Yeah other side of the state tho.

[sickocb7]

[QUOTE=turbo90accord;2220248] There would be no power benefits from running e85 on an NA motor. QUOTE]


i believe this statement is false. running e85 in a NA motor allows you to run more aggressive timing. with an octane rating of 100-105, that means you can get away with runing a high C/R on the street thus making crazy power

13:1 c/r + e85= crazy fun DD

[turbo90accord]

[QUOTE=sickocb7;2220403]

There would be no power benefits from running e85 on an NA motor. QUOTE]


i believe this statement is false. running e85 in a NA motor allows you to run more aggressive timing. with an octane rating of 100-105, that means you can get away with runing a high C/R on the street thus making crazy power

13:1 c/r + e85= crazy fun DD

actually the octane rating on e85 is an average of 114. And i was referring to a stock NA motor. on a stock motor e85 wouldnt net any difference just like trying to put 91 octane in the motor. It creates no more HP than the motor can efficiently create.

[foamypirate]

if i remember correctly i think they are 325cc

I was under the impression that they were only 240cc? Not positive.

[wed3k]

[QUOTE=turbo90accord;2220769]

actually the octane rating on e85 is an average of 114. And i was referring to a stock NA motor. on a stock motor e85 wouldnt net any difference just like trying to put 91 octane in the motor. It creates no more HP than the motor can efficiently create.

yea you're going to need to put some 12:1's in order for anything to work efficiently.