e85 "rotation" necessary ...

[NoHaveMSG]

Originally Posted by CSG Mike

To keep your injectors clean. E85 doesn't have cleaning additives. The "cleanness" or "corrosiveness" has nothing to do with keeping the injectors clean.

To everyone else who says they have no issues: Have you ever flowbenched your injectors after just being on ethanol for a long time? Independent data my surprise you and change your mind very, very quickly.

I have heard of this in our cars with pump gas too.

[CSG Mike]

Originally Posted by NoHaveMSG

I have heard of this in our cars with pump gas too.

It happens with all fuel, just much faster when you don't have detergents.

[CincyJohn]

Originally Posted by CSG Mike

To keep your injectors clean. E85 doesn't have cleaning additives. The "cleanness" or "corrosiveness" has nothing to do with keeping the injectors clean.

To everyone else who says they have no issues: Have you ever flowbenched your injectors after just being on ethanol for a long time? Independent data my surprise you and change your mind very, very quickly.

Do tell. Some specifics on those flow tests, length of e85 use, and comparisons to petrol injectors used over a similar time period would be helpful.

So do you think running occasional tanks of petrol will help that? What about occasional off-the-shelf additives? Or is the solution just to change your injectors after a certain period of time (and get advantages of higher flow aftermarket injectors at that time).

[Sur]

Originally Posted by CincyJohn

Do tell. Some specifics on those flow tests, length of e85 use, and comparisons to petrol injectors used over a similar time period would be helpful.

So do you think running occasional tanks of petrol will help that? What about occasional off-the-shelf additives? Or is the solution just to change your injectors after a certain period of time (and get advantages of higher flow aftermarket injectors at that time).

I’m curious about this too. I want to run E85. But not if it will cause unnecessary harm to my system. So what can I do to ensure this doesn’t happen when running e85.

Or is the best course of action to get a flex fuel kit and upgrade fuel pump and injectors?

[NoHaveMSG]

Originally Posted by Sur

I’m curious about this too. I want to run E85. But not if it will cause unnecessary harm to my system. So what can I do to ensure this doesn’t happen when running e85.

Or is the best course of action to get a flex fuel kit and upgrade fuel pump and injectors?

It is easier to just go flex fuel. There is only one station in your area I am aware of.

No need to upgrade fuel pump or injectors unless you are FI. I am running all stock fuel system.

[Sur]

Originally Posted by NoHaveMSG

It is easier to just go flex fuel. There is only one station in your area I am aware of.

No need to upgrade fuel pump or injectors unless you are FI. I am running all stock fuel system.

I plan to get a FF kit. But I just wanted to feel the difference in power with E85 now haha

[aKaGorganZola]

Haven't seen anyone mention this but if your fuel pump starts to go and you go and do a pull and lean the motor out it could lead to a very large vent being added to your block. Likelihood of that happening is low and I wouldn't worry about it much but I did go ahead and add a fuel pressure safety switch that would yank timing and try to save the motor in the event of fuel pressure loss.

[steve99]

Originally Posted by aKaGorganZola

Haven't seen anyone mention this but if your fuel pump starts to go and you go and do a pull and lean the motor out it could lead to a very large vent being added to your block. Likelihood of that happening is low and I wouldn't worry about it much but I did go ahead and add a fuel pressure safety switch that would yank timing and try to save the motor in the event of fuel pressure loss.

NA car unlikely on any fuel to go bang. also far less likely to be an issue on E85 due its much higher octane rating and knock resistance. Leanout manily issue with boosted cars and fuel pressure safety is good idea

As previous ive run E85 full time for 8 years stock fuel system no issues no additives added to fuel.

ive tuned countless cars to E85 only, our country we have guaranteed 85% ethanol at pump never varies , maybe out E85 better quality.

Many tuners here tune E85 full time no flex many track cars as well , due to the availability of consistent pump E85 that always 85% lots of boosted cars as well.

the only issues ive seen is people adding additives to E85 which i suspect were for petrol and it caused clogged fuel filters with a jelly like substance.

[Maru86]

Originally Posted by steve99

NA car unlikely on any fuel to go bang. also far less likely to be an issue on E85 due its much higher octane rating and knock resistance. Leanout manily issue with boosted cars and fuel pressure safety is good idea

As previous ive run E85 full time for 8 years stock fuel system no issues no additives added to fuel.

ive tuned countless cars to E85 only, our country we have guaranteed 85% ethanol at pump never varies , maybe out E85 better quality.

Many tuners here tune E85 full time no flex many track cars as well , due to the availability of consistent pump E85 that always 85% lots of boosted cars as well.

the only issues ive seen is people adding additives to E85 which i suspect were for petrol and it caused clogged fuel filters with a jelly like substance.

@steve99 are you aware of anyone having issues with the HPFP on a diet of E85? I've seen a lot of talk over at NASIOC around HPFP failure on higher ethanol blends for the FA20DIT WRX. Would be keen to hear if you have a theory on why it's been so prevalent for them (fuel quality as you mentioned, additional demands on the pump in the context for the DIT)?

[steve99]

Originally Posted by Maru86

@steve99 are you aware of anyone having issues with the HPFP on a diet of E85? I've seen a lot of talk over at NASIOC around HPFP failure on higher ethanol blends for the FA20DIT WRX. Would be keen to hear if you have a theory on why it's been so prevalent for them (fuel quality as you menttioned, additional demands on the pump in the context for the DIT)?

Occasionalky hpfp fails on petrol, we have a lot of people on e85 long term here no noticable increase in hpfp or any other tupe of failure on E85 86/brz



I dont know about wrx dit, maybe as a single direct only fuel system it having to run very hard to supply the extra fuel ( maybe the dit tuners are increasing the di pump pressure targets )where as our cars with port and direct systems it not pushed as hard but thars just wild guess.

[ermax]

I’ve got about 3 years on E85 exclusively. The only time I would consider swapping is if you go long periods without out driving the car. For example I wouldn’t put my car away for the winter with E85 in it due to the way it collects water.