Would you want your engine to run 30 - 40% leaner?

I wouldnt.

hagan051083 - Yes, you would need to tell your insurer. But if you tell them it is mapped for bioethanol for environmental reasons they should not penalise you I wouldnt have thought.

 

ok but will it run off normal v power still? an will it run ok if i use v power after i get it mapped for e85

 

Its one or the other if you are going to map it purely on one fuel.

That's why at the moment this thread was about using a mix of e85 within the tank along with petrol. Something like 10% e85 seems to work very well and is easy to do. Simply carry a 5 litre can of e85 and put that in the tank when you fill up (45 litres of petrol)

With a 10% mix you 'could' get away with it without getting remapped but there really wouldnt be a point to doing it as you will get hardly any benefits from it.

With a remap you will see a big difference.

 

Gonna try running a 10% mix when I get mine mapped by JGM in December

Will let you know how it goes!! Luckily, Cardiff Bay Morrisons is only a few miles from me

 

My guess is that you'll be seriously impressed

 

Duncan,
You seem confused.

I was not referring to the requirement of the remap. I was referring to the poster saying that he "felt" a lot more power without a remap and you said "Oxygen", when I commented. I questioned that by saying my previous post, which you have just quoted.

So... is the affect that dramatic (i.e. the power) just by putting E85 in and no other changes (forget the lean issue)? As that is what I was questioning.

 

engine will produce more power leaner, but the heat generated will damage pistons or valves etc.. plus assuming he is on a newage then the ecu will play with the ignition.. assuming it is not detting it will advance the timing a little.

As has been said I would not advise running it unmapped..

Simon

 

I was assuming that the poster had used a mix of say 10% - in which case the fact that the e85 is oxygenated introduces more oxygen to the burn process. Obviously I would not run it without remapping but it will have some impact on power (although I would doubt if noticeable in a butt dyno)

The fact that the poster ran on pure e85 without mapping meant that instead of running at 11:1 on boost, it would have been running at possibly close to 14:1 (if we talked in terms of petrol stoich) As simon says, it will produce more power leaner but that is waaaay the other side of what is desireable. Lucky escape I reckon.

 

Well maybe he didn't put pure E85 in it.
This is an interesting topic anyway. I have been running my sti on a mixture between 5-10% bioethanol for almost 3 month now and is all fine. In holland is the only fuel reaching 100 oktane so this or 97 or bp ultima crap..... However my car was JGM'ed but not for this fuel, and I don't think it is running lean as my fuel consumption is only slightly better.
On the good side, car seems to like it, holds high revs well and feels stronger on lower end too. Engine/turbo sound v nice too -no weird rattles etc -as you'd get with crappy fuel.
BTW. Subaru says on std engine that you can use E85, but a max of 20% mixture - I guess more than that and you start melting internals

 

Can you elaborate on this please???

I don't think my insures are bothered what "petrol" I run and to them E85 comes from a pump at the petrol sation.

 

I tell my insurer (KM) everything. I take the view it is better to tell them anything that is non-standard as then it gives them no excuses in the event of an accident. They need to be told if the car has been remapped.

I am sure that if you have a std car converted to run on e85 that there would not be a financial penalty in terms of higher insurance for doing this. Obviously most of us don't run std cars so would have a hard job explaining that the remap was for environmental reasons only.

 

it will inject the same amount of fuel but differing fuels will need more or less fuel injected.. fuel consumption will be improved as it will run more power wit hthe mix in so you put your foot on the loud pedal less hard during normal driving..

Simon

 

E85 is sold in almost every petrol station here in Sweden but AFAIK the car needs to be mapped for it to use it. You can't just fill up with E85.
On a Volvo rental car we didn't notice much difference between petrol and E85, maybe with E85 it was a bit more responsive but mpg was slightly lower too. E85 is cheaper than petrol too.

 

I would like to know where this is stated. Does the same apply in my 2007 WRX?

 

I would like to know where this is stated aswell.

 

right my car engine light has come on! so the fuel was a bad idea! only done a cuple of miles then it came on so am now going to add as much normal petrol as possible 2 weaken the mixture! an use it as little or not at all! any one recomend any garages around liverpool to take it to for remap, an a service? an also to see if it damaged my car!

well i guess i messed up! :P hope nothin to bad had happend

 

It depends how you have driven it in the 2 miles. is that all you have done with that fuel in it?

Remap - I would speak to JGM or take the car the Zen in northampton

 

no i must have done about 10miles in it with e85 in it! northhampton abit far for me 2 go i need some where closer to liverpool. so any help on garages around liverpool that u would recommend?

 

makes sense It drives v well on it. I hope I'll have some time to take it to RR, as I'm getting curious on figures.

 

I've been trying to remember where I read this... but it was 3 month ago and have no idea really. At that time I readresearched anything I could about this fuel mix. In any case I asked my local subaru dealer and they also said I can use it.

 

The mechanicals and fuel hoses etc are able to run on it in a newage subaru - but I would (from what I have seen on a 20% mix) remap for it for sure.

 

Please if any one knows any garages in liverpool who they would recommend for remap, advise an car care could they please private msg me! am in real need of your help ppl thanks

 

Could you have dual maps, with and without an E85 mix on a Simtec?

Or is it a case of once using, always using?

I'm quite keen on some free BHP/LB.

 

thats somethin i would like 2 know can u get duel maps? so i can run both fuels?

 

Yes gaz - a Simtek would be the ideal way to do this (or other switcheable map ecu).

 

My dyno run from today running on e85 mix. Power at the top is limited due to injector sizing/maf voltage but check out the torque

 

Nice i hoping to have a simtec in jan so i'll be doing the duel map thing

 

totally convinced now going for remap this week (jgm in surrey) think i'll run my hi boost map with a 20% mix of e85
cheers

 

Duncan,
Nice figures.

 

Cheers Shaun.

Nothing like a bit more early boost to give some good torque figures