[E92FAST]

i have been researching but haven't found the answer that I am looking. So sorry if this question has been asked too many times.

I am looking into going to E85, since I heard it has great power gains for our N54. So my question is what mods should I go with? Is it possible to run 100% E85 gas into my tank? What should I look out for?

I currently have Cobb V3 DCI and DPs.

Thanks in advance!

[Gizm0]

Walbro 450 and port injection needed for full e85

[ferocity02]

With stock low pressure fuel pump you cannot run 100% E85. You can run E30 (30% ethanol) and use the Cobb E30 map. This will yield some good gains.

[Turbo_power4ever]

You will need- Upgraded lpfp ( low pressure fuel pump). Stage 2 or 3 depending on hp goals. And- TBI ( throttle body injection) or PI ( port injection). TBI will only support up to 500hp with 100% e85. More power than that will need PI. TBI kit will cost like 650ish i believe and PI kits are like 1500+ i believe??? Not 100% on those prices but theyre pretty close i think.

[BSM n54iS]

Would you also need an upgraded lpfp to run a mix of e85 and pump, say 50/50? Or would that be something that's just considered a good idea to do

[335NJ]

Originally Posted by Black n54is

Would you also need an upgraded lpfp to run a mix of e85 and pump, say 50/50? Or would that be something that's just considered a good idea to do

Every car is different. General rule is anything over E40 needs an upgraded LPFP.

Only way to determine your threshold is to dump in 30% E85 w/93, and log it.

[BSM n54iS]

Cool thanks for the n00b starter tip

[stanlalee]

If you just want to run up to E50 you can just run a Fuel it stage 1 which is a secondary inline pump. Only cost $175 and has everything you need to install. The stage 2 pump is a drop in bucket and a little more powerful but cost a lot more and requires your bucket core (or its really expensive). Not sure its smart to tune beyond the capabilities of E50 on a daily anyway. E50 probably offers enough knock resistance for whatever you want to do in terms of tuning on stock turbos.

[theweebabySeamus]

Seems like there's some guys that have run 100% with an upgraded LPFP but more from a wanting to use just e85 standpoint, rather than maxing out the power capabilities of the fuel.

[csu87]

I run 100% e85 with just stage 2 lpfp upgrade, but i run a conservative fueling map that is leaving some power on the table to do so. You can't really take advantage of full e85 without hpfp support through tbi or pi

[marvin1992]

Are there benefits to running e85 other than power? Is it better or worse for the car than running 93 in terms of reliability and longevity?

[Antetokounmpo]

Originally Posted by marvin1992

Are there benefits to running e85 other than power? Is it better or worse for the car than running 93 in terms of reliability and longevity?

Does producing significantly more power than stock make the car more durable or reliable?

[mike@x-ph.com]

Originally Posted by marvin1992

Are there benefits to running e85 other than power? Is it better or worse for the car than running 93 in terms of reliability and longevity?

More power / safer fuel

Originally Posted by Heel Toe

Does producing significantly more power than stock make the car more durable or reliable?

Putting more pressure will not make the car more durable
As long as you running the recommended map and logging it will not make it less durable either.

[sk55]

Originally Posted by marvin1992

Are there benefits to running e85 other than power? Is it better or worse for the car than running 93 in terms of reliability and longevity?

e85 is cleaner fuel. its better and safer for your engine to tune with... e85 is very knock resistant.

go with with fuel it stage 2 pump , took about 1 hr to install... let your car depressurize overnight before installing..

i love running e50...

[924er]

Originally Posted by ferocity02

With stock low pressure fuel pump you cannot run 100% E85. You can run E30 (30% ethanol) and use the Cobb E30 map. This will yield some good gains.

That is incorrect. You can go ahead and run 100% e85 with a stock fp. As long as your tuner sacrificed the power at the low end.

It's not the e85 context that's the problem it's how you wanna tune it.

I've been thru this many times with a few different tuners like wedge and ptf

[NoSlow5oh]

Originally Posted by 924er

That is incorrect. You can go ahead and run 100% e85 with a stock fp. As long as your tuner sacrificed the power at the low end.

It's not the e85 context that's the problem it's how you wanna tune it.

I've been thru this many times with a few different tuners like wedge and ptf

You are not making much sense in a thread titled e85 basics. Would you care to elaborate on your theory to those of us eNoobs?

[JasW]

Originally Posted by NoSlow5oh

You are not making much sense in a thread titled e85 basics. Would you care to elaborate on your theory to those of us eNoobs?

I'm not sure I get that either. My understanding has been that you should not run much more than E30 with the stock LPFP, and as you go beyond that, you will sacrifice power and the stock LPFP won't be able to handle it. I have the stage 2 LPFP upgrade on order, and when I asked Wedge whether I'd now be able to run 100% E85 on his custom tune, he said sure, but only if I did not want to put down 500+wtq. In other words, if I want to put down more than 500wtq, I have to run around E65. Although he didn't elaborate, I realized that's one of the reasons why there's the BMS port injection fuel kit, to take full advantage of the potential power offered. Replacing the stock LPFP with an E85 certified LPFP alone won't do it. Somebody else can explain why better or more accurately.

[Bme30]

Ok......
So for a stock fuel pump car you can run around e30-e40 give or take. Like said above all cars a different but this seems to be the standard.
To run let's say e40-e55 you will need a stage 1 inline pump. (All pumps here) www.fuel-it.biz

Anything beyond that you will need to go higher to a stage 2 or 3. And any of those mods depends on your power goals in the future. To run 100% e85 you will need port injection or throttle body injection or Vargas shotgun pumps.
The weakest link in this entire equation is your hpfp. E85 required 30% more fuel to get the required btu's.
My car personally ran a stage 1 pump with e40 on my single setup 6466 up to 22psi before I needed more. Now with the stage 3 lpfp and port injection I run 100% e85 and 32psi and have plenty of fuel left.

[Mike@N54Tuning.com]

Originally Posted by sk55

e85 is cleaner fuel. its better and safer for your engine to tune with... e85 is very knock resistant.

go with with fuel it stage 2 pump , took about 1 hr to install... let your car depressurize overnight before installing..

i love running e50...

and has a much higher effective octane allowing more power, but you get much worse fuel economy out of it.

Mike

[924er]

Originally Posted by Bme30

Ok......
So for a stock fuel pump car you can run around e30-e40 give or take. Like said above all cars a different but this seems to be the standard.
To run let's say e40-e55 you will need a stage 1 inline pump. (All pumps here) www.fuel-it.biz

Anything beyond that you will need to go higher to a stage 2 or 3. And any of those mods depends on your power goals in the future. To run 100% e85 you will need port injection or throttle body injection or Vargas shotgun pumps.
The weakest link in this entire equation is your hpfp. E85 required 30% more fuel to get the required btu's.
My car personally ran a stage 1 pump with e40 on my single setup 6466 up to 22psi before I needed more. Now with the stage 3 lpfp and port injection I run 100% e85 and 32psi and have plenty of fuel left.

Really? Wedge is working on a e50 tune for Me. I'm fbo and all stock. I guess it depends on how you tune it.

They recommended e50 because it's easy to mix. PTF told me they usually tune e50 not e30.

[csu87]

So much incorrect and half true facts in here.

Yes you can run 100%e85 without any fuel systems upgrades, however you will be running a pretty conservative tune as to not max out the lpfp. It's not so much the low end that you run out of fuel as it is the high end.

Yes you can also run 100% e85 with only an upgraded lpfp, but again, conservatively tuned. I made almost the same power on e60 as i do on e85, since you have to tune conservatively in order to not max out the hpfp inthe upper rpms.

I still peak around 21psi but taper to 16/17psi at 6k rpm to allow the hpfp to keep up.

Of course, every car is different though and if you want to run any kind of e85 mix, you need to continually log until it is dialed in.

[csu87]

Originally Posted by Bme30

Ok......
So for a stock fuel pump car you can run around e30-e40 give or take. Like said above all cars a different but this seems to be the standard.
To run let's say e40-e55 you will need a stage 1 inline pump. (All pumps here) www.fuel-it.biz

Anything beyond that you will need to go higher to a stage 2 or 3. And any of those mods depends on your power goals in the future. To run 100% e85 you will need port injection or throttle body injection or Vargas shotgun pumps.
The weakest link in this entire equation is your hpfp. E85 required 30% more fuel to get the required btu's.
My car personally ran a stage 1 pump with e40 on my single setup 6466 up to 22psi before I needed more. Now with the stage 3 lpfp and port injection I run 100% e85 and 32psi and have plenty of fuel left.

You are moving a ton more air than a stock turbo car, so yeah, you need more fuel. This is tuning 101.

Comparing your setup to a stock turbo setup is not even apples to oranges, its apples to broccoli.