E85 on RS2: 22% more torque, 10% more power

[k.alle]

In fact just manufacturing and transporting the E85 to the pumps is emitting more pollution than just going with petrol, which gives a negative effect on mother nature despite the lower CO2 emissions when burnt in an engine.
Oh, the irony

At least that's what the tree huggers is trying to convince us of here in Sweden, you must ALWAYS have a guilty conscience when driving a car even though you try to make the right decisions and be "environmental friendly".

But that put aside, at least Norway and Sweden has so many new E85 rolling on the roads every year that they simply can't back down on it now, it would be devastating.


But god almighty it's a good fuel


Go easy on the Vodka , it's probably only 40% ethanol and ~56% water

[Audi_CQ]

Another question - seeing as I can't buy E85 here - could I pour a bottle of Vodka into the tank, hoik up the fuel pressure and go have some fun ?

96% moonshine would be better

[EspenW]

Whilst I love the extra oomf that appears to come from this E85 jungle juice... Isn't kinda weird that its touted as a 'green' fuel - just cos of lower CO2 emissions I guess - havent the tree huggers noticed that MPG is reduced by ~30% ? So isn't the average car running this stuff, actually producing more CO2 as a result ?

And have the tree huggers worked out how many square miles of biomass would be needed to supply the worlds automotive fuel requirements with E85 ? The numbers just don't add up... Aint it curious that its essentially a subsided form of G-force increasing, grin inducing, upgrade for any potential turbo engine owner. Enjoy it while you can

Another question - seeing as I can't buy E85 here - could I pour a bottle of Vodka into the tank, hoik up the fuel pressure and go have some fun ?

I don't remember the exact percentages, but CO2 emissions from E85 should be approx 1/5th of that from running on petrol. However, the point is that net CO2 emission is zero, since the plant absorbs the same amount of CO2 when it grows (photosynthesis) as it releases when it is being burned.

Vodka will help, but sorta expensive way too boost octane

[pnanassy]

How is your cold start under 0Celsius?
Do you know what coldstart settings you have in the ECU?


Thanks,
Peter

[EspenW]

How is your cold start under 0Celsius?
Do you know what coldstart settings you have in the ECU?


Thanks,
Peter

Haven't started it in freezing temps yet, but I suspect that it will be a problem, even with the winter time E75 mix at the pump.
The solution is to use a block heater or simply to spray a little bit of cold start spray (WD40 is supposed to work too) through a vacuum port on the intake manifold. That makes it fire right up. Both my cars are driven only now and then (ride my bicycle most of the time), so I don't mind the hassle, really.

Not sure about the cold start settings in the ECU.

[pnanassy]

Mine starts relatively well in 5+ degs,but that 0 today was really PITA.But hopefully i will be able to adjust the values to get it started for the 3.-4. time,compared todays 10.

Thanks

[EspenW]

As can be seen from my original 3rd gear graph, I had some hesitation at the onset of boost, and a hole in the curve at max torque. At first I thought this was due to me lifting the throttle for a split sec, then feared that it was the clutch slipping.
Turned out to be misfire due to very rich mixture: AFR's in the 10's in fourth gear. With E85, that mixture is pretty hard to fire up. Gradually lowered the fuel pressure from 4 to 3.6 bar and got rid of the hesitation and misfire. Nice and smooth curves now.

Graph 1 shows power and torque uncorrected for temperature, etc. 401ps (395bhp) and 552nm at the wheels. 4th gear test would have given a few hp and nm more due to more boost and lower inertia losses.

Graph 2 shows the torque curve with 3.6 bar fuel pressure vs 4.0 bar

Graph 3 shows the power curves from two pulls made approx. 3 minutes apart

[maRS2]

I'm also thinking of moving my RS2 to E85.
What size injector will i need for that concidering that I have MRC remap?

My Transporter V6 already run on E85 and my butt dyno tell me it's got more torque.

here are some intresting reading

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

It's not Audi but scooby sorry

[EspenW]

I'm also thinking of moving my RS2 to E85.
What size injector will i need for that concidering that I have MRC remap?

My Transporter V6 already run on E85 and my butt dyno tell me it's got more torque.

here are some intresting reading

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

It's not Audi but scooby sorry

The NASOIC thread is very interesting with lots of good info.
I think injectors of around 500cc will work well with your setup. You also need a wideband lambda. Most likely you will need an adjustable fuel pressure regulator for fine tuning the AFR. 044 pump might be required too.
I got my Siemens 630cc injectors for $45 a piece on Ebay and paid $180 for the 044 pump also off Ebay.

[M_GORDON]

thank you for eplain it bioethanol 85% + 15% petrol 98 of course hehehe

and i think that E85 it´s not nothing bad or dangerous for our turbocharged engines true??

Bioethanollllll

JAJAJAJAJA

[nilo]

This is a very interesting thread. We have E100 here in Brazil, and it costs pratically half the price of gasoline. After reading this, I´m definetly going to give it a try next year. I´m running premium 95(ron+mon/2) oktane gas, but ethanol has close to 110 (ron+mon/2), I think that´s going to make a good upgrade on power when I time it correctly. My RS2 has original turbo, bigger injectors and a 3 inch free exhaust system with no cats. Maybe using alcohool I can get 400 crank hp using 1.6bar boost. What do you think?
Espen, we here have a cold start mechanism for vehicles running ethanol. It´s basically an extra injector that sprays gasoline from a separate reservoir (with around 3 litres) connected to a temperature sensor. So, when temperature is, let´s say, below 3 degrees, that injector is trigged by a solenoid and you can have a perfect cold start. My 2 cents.

Regards

Nilo

[Anagonda]

Just dreaming of that day when Finnish goverment allows e85. At this moment the diesel is the baddest thing on earth and e85 is much worse than drugs I don't understand the brains of this country...

Wow, E100 in brazil? Never heard of that used in gasoline engine. Would be nice to try it, if it even possible to run on gas-engine. I think in todays world it would be "impossible" to get it to detonate. Niiiice... Big boost... Niiice...

[EspenW]

This is a very interesting thread. We have E100 here in Brazil, and it costs pratically half the price of gasoline. After reading this, I´m definetly going to give it a try next year. I´m running premium 95(ron+mon/2) oktane gas, but ethanol has close to 110 (ron+mon/2), I think that´s going to make a good upgrade on power when I time it correctly. My RS2 has original turbo, bigger injectors and a 3 inch free exhaust system with no cats. Maybe using alcohool I can get 400 crank hp using 1.6bar boost. What do you think?
Espen, we here have a cold start mechanism for vehicles running ethanol. It´s basically an extra injector that sprays gasoline from a separate reservoir (with around 3 litres) connected to a temperature sensor. So, when temperature is, let´s say, below 3 degrees, that injector is trigged by a solenoid and you can have a perfect cold start. My 2 cents.

Your 95 petrol is pretty high octane already, should be around 100-101 RON.
E85 is officially 104, but its effective octane rating is supposedly around 116 due to the cooling effect. In other words, as good at suppressing knock as C16, but provides heaps more power due to cooling.
Mmmmmmm E100. That is good stuff. Supposedly has a octane rating of around 130. Effective octane probably 140+.
On E100 you should be able to reach 400 crank on the original turbo. I would run more peak boost though, you will pick up a shedload of torque.

[porkkis]

And finally E85 is sold in here too. I just did my first motronic mapping for E85 and I have to say I'm pretty excited about the fuel.
We just have to wait for a while for the distribution network to grow. I'm not able to use it myself yet as the nearest pump is 220kms away from me. They only sell the stuff in the capital city area at this point...

I'll be running my s2 on E85 from day 1 when they sell it locally.

[EspenW]

E85 rocks