how to run full e85 on n54

[james747]

after doing alot of research i noticed that not many people are running straight e85, but they are mixing it, what would i need to do to my 335i to run straight e85, i have had an evo in the past and ran straight e85 for 2 years before i sold it with no problems, by just doing injectors and fuel pump to support the flow. i dont want to mix e85 is there people out there that have been running straight e85 safely? thanks in advance.

[///MPOSTER]

They do run full e85. Without the back end flash you are limited to the amount you can use before your fuel enrichment/trims are maxed.
So you need:

e85
backend flash
Low pressure fuel pump upgrade to supply more pressure to HPFP

optional:
port injection / throttle body injection.

[BoostDr]

Yeah plenty of people run straight corn, but as ///mposter mentioned the % each person runs varies with the strength of the existing rule pumps. With an E85 backend and stage2 or 3 from fuel-it you should be good on stock turbos.

[Sticky]

Supplemental port injection looks to the be the most consistent way to make this happen with a variety of power levels. Unless someone has other suggestions?

[pr3ci5n335i]

after doing alot of research i noticed that not many people are running straight e85, but they are mixing it, what would i need to do to my 335i to run straight e85, i have had an evo in the past and ran straight e85 for 2 years before i sold it with no problems, by just doing injectors and fuel pump to support the flow. i dont want to mix e85 is there people out there that have been running straight e85 safely? thanks in advance.

There are two options that I think work best:
1. Throttle Body injection kit (designed for up to 500whp). $699 + shipping
http://www.n54tech.com/forums/showthread.php?t=30559

2. Port Injection kit (no HP limit that I've heard of). $1629 + shipping
http://www.n54tech.com/forums/showthread.php?t=28478

[JK210]

even on stock turbos you will run out of fuel with straight e85, my hpfp was near maxed on map 7 with e60 and bms e85 backend flash with some tweaks. If you really want to run straight e85 you will need some sort of supplemental fueling either throttle body injection(tbi) or port(pi) but stock hpfp will not cut it if you are trying to make any power. tbi will run out of fuel around 500-550 on straight e85, port injection maxed out with stage 3 fuel it, return and feed lines starts to become taxed around 800 but can be pushed somewhat further(not a whole lot).

[Enfiftyfore]

Basically, you need PI or TBI. We don't have any options for HPFP or injector upgrades.

[ken2521]

just curious how formula 1/DTM runs one injector per cyl and can make more power and we have to do port and tbi. we must be missing something

[lulz_m3]

just curious how formula 1/DTM runs one injector per cyl and can make more power and we have to do port and tbi. we must be missing something

Full control of fuel injectors and the ability to source larger injectors is whats missing. Control will come with time, injectors may never come unless switching to non piezo units. At that point you're likely going to just go full standalone and custom injectors.

[Sticky]

Basically, you need PI or TBI. We don't have any options for HPFP or injector upgrades.

This simple.

Although it would be nice to see upgrades be able to run to 100% E85. I mean upgrades like the bigger twins, singles, etc.

[JK210]

This simple.

Although it would be nice to see upgrades be able to run to 100% E85. I mean upgrades like the bigger twins, singles, etc.

I agree it would be awesome to be able to run straight e85 without the need of supplemental fueling, it would make tuning so much easier, although i have to give it up to terry his integration of the aic and the jb4 make it a whole lot easier since the aic can be fine tuned through the jb4 settings.

[Rotary Rasp]

I get rough cold starts when i run full e85.

[Rotary Rasp]

oh and I get like 9 mpg...

[blaster3500]

I get rough cold starts when i run full e85.

That can be fixed in your tune. Maybe back in late 2015 (when this thread was created) it was an issue. I appreciate activity/posting, but you dug deep to find this one .

[Rotary Rasp]

Woops!

That can be fixed in your tune. Maybe back in late 2015 (when this thread was created) it was an issue. I appreciate activity/posting, but you dug deep to find this one .