[aren93]

Guys if I want to run 100% e85 with say the fuel it stage 2 lpfp upgrade. Do I have to have a backend flash or a cobb tune? Can't I just use my Jb4 map 5?

[PR3CI5N]

Your best bet is to add the stage 2 lpfp and the new port injection kit. Stage 2 lpfp isn't enough to run straight E85

[aren93]

Originally Posted by PR3CI5N

Your best bet is to add the stage 2 lpfp and the new port injection kit. Stage 2 lpfp isn't enough to run straight E85

Oh ok where can I find the port injection kit?

[PR3CI5N]

http://burgertuning.com/N54_secondar...ctors_BMW.html

[aren93]

Originally Posted by PR3CI5N

http://burgertuning.com/N54_secondar...ctors_BMW.html

That's for n54's though unless it works on n55 too and they don't ship to CA. $900 plus $400 for the fuel it..I might as well buy the Vargas single barrel hpfp upgrade for $1200.

[LGCubana]

Originally Posted by aren93

Guys if I want to run 100% e85 with say the fuel it stage 2 lpfp upgrade. Do I have to have a backend flash or a cobb tune? Can't I just use my Jb4 map 5?

Do you have the Flex Fuel wires for your jB4 ?

[aren93]

Originally Posted by LGCubana

Do you have the Flex Fuel wires for your jB4 ?

Yes I do but I want to run more then 40% and I don't want to worry about mixing it everytime..

[turbo_chris]

You can't run 100% E85 without either port injection or a HPFP upgrade.

[aren93]

Originally Posted by turbo_chris

You can't run 100% E85 without either port injection or a HPFP upgrade.

OK so looks like I'm saving up for Vargas HPFP upgrade but you guys still haven't answered my question....lol can I run 100% e85 without a backend flash or a cobb tune? Just a Jb4 on map 5

[2fly4em]

Originally Posted by PR3CI5N

http://burgertuning.com/N54_secondar...ctors_BMW.html

Damn!! That price

[turbo_chris]

You will need a back end flash via cobb with custom tuning.

[waterbottle1]

Originally Posted by turbo_chris

You can't run 100% E85 without either port injection or a HPFP upgrade.

There is a fbo 135i running 100%e85 on cobb tune in perth.
Forgot his username.. but his making over 435hp and 660nm atw.

So i guess its possible.

[JETmn]

Originally Posted by waterbottle1

There is a fbo 135i running 100%e85 on cobb tune in perth.
Forgot his username.. but his making over 435hp and 660nm atw.

So i guess its possible.

He must have some other type of injection also. Wait for the Fuel It TB injection, that is being made for someone that wants under 500whp, but to run pure E85. It will be much cheaper too.

[mike@x-ph.com]

Originally Posted by PR3CI5N

Your best bet is to add the stage 2 lpfp and the new port injection kit. Stage 2 lpfp isn't enough to run straight E85

+1

Also there are no gains from running 100% e85 with stock turbos

[Nugget]

Originally Posted by waterbottle1

There is a fbo 135i running 100%e85 on cobb tune in perth.
Forgot his username.. but his making over 435hp and 660nm atw.

So i guess its possible.

SYNG, his is N54 and he just has an upgraded LPFP no other fuel system upgrades.

You probably could run 100% e85 with just an upgraded LPFP and the proper back end flash. But on lower boost levels only. So you would end up making less power than if you ran e50. Find a good tuner and talk to them.

I am going to install the Vargas HPFP and try running 100% e85 on higher (20+ psi) boost.

[waterbottle1]

Originally Posted by Nugget

SYNG, his is N54 and he just has an upgraded LPFP no other fuel system upgrades.

You probably could run 100% e85 with just an upgraded LPFP and the proper back end flash. But on lower boost levels only. So you would end up making less power than if you ran e50. Find a good tuner and talk to them.

I am going to install the Vargas HPFP and try running 100% e85 on higher (20+ psi) boost.

Yep, thats right

[Schmidty335i]

Originally Posted by mike@x-ph.com

+1

Also there are no gains from running 100% e85 with stock turbos

^^^ exactly what i was thinking...

[135Pats]

You'll need flash tuning on the fuel side. Piggybacks don't have sufficient control over fuel and substantial scalar adjustments need to be made.

You won't see useful gains on stock turbos going from E50 to straight E85. If you do, it would be the result of tuning that would smoke the turbos in about a month.

You'll need addtl. hardware to run E85 safely. At the very least, a robust low pressure setup. Highly likely that will not be sufficient, in which case you'll either need to add pressure at the high pressure side (VTT), or add in port fuel (BMS or Motiv).

But to be frank, I don't see what the goal is here. You'd be throwing fuel at a motor that currently can't put it to use for a variety of reasons.

[aren93]

Originally Posted by 135Pats

You'll need flash tuning on the fuel side. Piggybacks don't have sufficient control over fuel and substantial scalar adjustments need to be made.

You won't see useful gains on stock turbos going from E50 to straight E85. If you do, it would be the result of tuning that would smoke the turbos in about a month.

You'll need addtl. hardware to run E85 safely. At the very least, a robust low pressure setup. Highly likely that will not be sufficient, in which case you'll either need to add pressure at the high pressure side (VTT), or add in port fuel (BMS or Motiv).

But to be frank, I don't see what the goal is here. You'd be throwing fuel at a motor that currently can't put it to use for a variety of reasons.

Lol you make some good points I just don't like having to fill up and mix 2 types of fuel but yea I will probably buy the VTT HPFP upgrade soon