[Chalo1]

Is there any 335i using E85 fuel?? I\'m asking because I just got my 335i but prior, I had a 300zx TT and I started using E85 to get away from buying meth, race gas.

[Syndicategt]

Some people mix E85 with their gasoline. You can't run straight E85 due to the fueling issues we have. We would need a bigger pump and injectors to go straight E85, and thats not available currently.

[enrita]

plus the fact the whole fueling system is not designed to run straight E85

[Chalo1]

Originally Posted by enrita

plus the fact the whole fueling system is not designed to run straight E85

please explain....

[OfourTHREEfive]

Originally Posted by Chalo1

please explain....

Injectors are too small and fuel pump isnt ready for it. You would need some pretty darn big injectors to run straight ethanol.

[R1000K3]

Originally Posted by Chalo1

please explain....

It is OK for a stock N54 regarding fuel amount but not at high power levels where the fueling system capacity is near the roof. It takes about 40% more E85 in volume to make the same power as with gasoline. Bonuses are you can run higher compression though, or more timing advance. The long term effects by E85 on the N54 and its fuel system is yet to find out. It is not sure that these components will survive a strong ethanol concentration during prolonged usage. It is safer to use methanol injection that will spare the fuel system from being exposed to alcohol.

[RnmEvo9]

Been running blends of 50/50 of pump 93 and E85 for a couple of months with no issues.

[Chalo1]

Well on my Z; I used 555cc with stock fuel pump with no issues( on 15psi to 20) I started to experience fuel issues at higher boost levels.

91oct vs e85 IMO and experience; 91 is not even in the same ballpark, with e85 and 1000cc injectors I dynoed 607rwhp and on 91oct same boost levels (20-23psi) 490rwhp. Also on E86 my motor ran a lot smoother and 0 ping.

[enrita]

We need someone offering to run straight e85 on max 14 psi of boost for 1 year :-) to test fueling system.
Hopefully by then we will be able to get bigger pump/injectors.

[ErvGotti]

As stated above our injectors just cant handle pure E85. I think someone on N54 tech tried it and was running way to lean with bad idle and stuff.

I run about a 20% mixture with 93 oct. 15psi boost with no timing drops. I have procede, FMIC, catback, intake. I throw in a couple of oz of marvel mystery oil. I'm not sure if it really does help lube the fuel system, but the car seems to be running strong on it.

I will go away from E85 when the air temps start droping.

[Chalo1]

What's the stock CC injector on a 08 335i?

[Chalo1]

Originally Posted by ErvGotti

As stated above our injectors just cant handle pure E85. I think someone on N54 tech tried it and was running way to lean with bad idle and stuff.

I run about a 20% mixture with 93 oct. 15psi boost with no timing drops. I have procede, FMIC, catback, intake. I throw in a couple of oz of marvel mystery oil. I'm not sure if it really does help lube the fuel system, but the car seems to be running strong on it.

I will go away from E85 when the air temps start droping.

I know that just adding E85 with no tunning will make any rough, I used a SAFC to tune my AFR's. It was really simple using s wideband o2 gauge.

[ErvGotti]

Originally Posted by Chalo1

I know that just adding E85 with no tunning will make any rough, I used a SAFC to tune my AFR's. It was really simple using s wideband o2 gauge.

Yeah but there is only so much boost you can run with E85 before you'll run lean with the stock injectors even with a tune. I believe they were running 14-15 psi with pure E85 and was running lean. At this stage I'll take my 20% with 93 oct at 15 psi with a proper running engine.

[Chalo1]

Originally Posted by ErvGotti

Yeah but there is only so much boost you can run with E85 before you'll run lean with the stock injectors even with a tune. I believe they were running 14-15 psi with pure E85 and was running lean. At this stage I'll take my 20% with 93 oct at 15 psi with a proper running engine.

it's true you can only use so much E85 before you start maxing out your injectors; but this also applies to regular gas.

At the same boost level, (15psi with E85 you will run safer than with 91-93oct.)

E85 in Cali goes for $2.50 a gallon

91oct sells for $4.10

Race gas 100oct goes for at least $70-$80 for 5 gallons

So if you think about it, you can cruise your 335i on 350-400whp on $2.50 a gallon plus run colder temps on your engine and no ping.

[Chalo1]

I know that it's not fair comparing my Z vs n54; but my point is here that I'm shocked to hear that 91oct plus meth is better than E85. I did about 10 pulls that night on E85 with Zero knock/ping, plus my plenum was cold.

First vid...91oct, 18degrees of timing, 14-15psi

http://www.youtube.com/watch?v=NB9I8tnrZa0

[Chalo1]

http://www.youtube.com/watch?v=ZjaW1ZHXK2U

[Chalo1]

Originally Posted by Chalo1

I know that it's not fair comparing my Z vs n54; but my point is here that I'm shocked to hear that 91oct plus meth is better than E85. I did about 10 pulls that night on E85 with Zero knock/ping, plus my plenum was cold.

First vid...91oct, 18degrees of timing, 14-15psi

http://www.youtube.com/watch?v=NB9I8tnrZa0

http://www.youtube.com/watch?v=ZjaW1ZHXK2U

[awd]

Originally Posted by RnmEvo9

Been running blends of 50/50 of pump 93 and E85 for a couple of months with no issues.

Stock or tuned?

[tibra1]

Ethanol is corrosive to non-metal parts and hygroscopic..I would def not use e85...

[Jeff@TopGearSolutions]

E85 requires about 20% more fuel. In most respects the stock fuel system can handle 430-450WHP on regular gas.

So you will run out of fuel 20% sooner. So to speak. You do the math. On this platform today it just doesnt hold any weight.

We have a iffy fuel system to begin with in terms of reliability, add a corrosive fuel like E85 and potentially open up more reliability problems and you have less power to work with cause of the fuel ceiling.

[Chalo1]

Originally Posted by Jeff@topgearsolutions

E85 requires about 20% more fuel. In most respects the stock fuel system can handle 430-450WHP on regular gas.

So you will run out of fuel 20% sooner. So to speak. You do the math. On this platform today it just doesnt hold any weight.

We have a iffy fuel system to begin with in terms of reliability, add a corrosive fuel like E85 and potentially open up more reliability problems and you have less power to work with cause of the fuel ceiling.

Are kidding me!! Even if you where to ran out of fuel 20% sooner; you would still make more power and run Safer than with reg octane.

Reg octane is corrosive too;

Have you ever tuned with E85?

[pcockley]

Originally Posted by Chalo1

Are kidding me!! Even if you where to ran out of fuel 20% sooner; you would still make more power and run Safer than with reg octane.

Reg octane is corrosive too;

Have you ever tuned with E85?

mmmmm i am not sure why you would buy a BMW performance car, add a tune to make it go faster then put in retarded fuel with a lower octane rating. what to save a few bucks.... WTF

if you want to save a few bucks buy a 320d