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[Reverted]

Originally Posted by Shad0ez

I've read that as well, but really? To have to add lubricant each time you fill up is ridiculous!

I agree it's absolutely stupid and Subaru should fix this. Hopefully they will one day.

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[FReSh_86]

Anyone interested in this? I'm selling it for $240 but I'm open for offers. Please PM me if interested.


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[Z0rr0]

Originally Posted by nelsmar

Tip: be careful with that E85... easy to pass MBT with DI alcohol =x The knock wall is basically non-existant.

E85 tuning needs to be done on a good dyno. MBT will manifest itself in a lower tq gain..

i.e. for every degree it's gaining 15 tq, then that last degree adds 8 tq, that's where to stop.

[nelsmar]

Originally Posted by Shad0ez

I've read that as well, but really? To have to add lubricant each time you fill up is ridiculous!

@nelsmar do you happen to know if this has any real detrimental effect on our engines? Considering you broke yours, I figure you might know

Just to be clear: E85 requires a new tune.

E85 increase corrosion to many materials, especially if the fuel has been exposed to an atmosphere with moisture in it (as in any humidity, and even if its low) has been sitting for a period of time. This water absorption will be corrosive to the engine. Also the water absorption can add corrosion and wear to our cylinder walls as our cylinders lay flat. Any minor bits of moisture left in the chamber after the engine is shut off will settle in the bottom of the cylinder and cause wear. Typically when i shut my engine off I rev it up and kill it at a higher RPM to "flush" as much fuel supply as possible out of the engine. I tested that it was doing something when we had a poor fuel enrichment for my start cycle making it difficult to start. If i killed the engine normal it would start up fairly easy, but if i rev'd it a tiny bit and killed it it would take about 2x as long consistently to start up.

Ethanol also does not have the lubrication properties of gasoline (petroleum!). Gasoline naturally lubricates things such as fuel pumps, and slightly helps in lubrication of the rings on your piston. Simply adding something such as 2 stroke oil, or lucas e85 additive every once and a while (or every tank) can help. I typically added a few oz of it every 10 or so tanks, i meant to put small quantities more often but i just never got off my ass and got a small bottle that was easy to keep in the car.

Also long term affects only time will tell. I put ~ 6-8k miles on high ethanol content and show no signs of wear.

And no I wouldn't recommend E85 just to fix the chirps FYI. It is surely just a coincidence. But do keep in mind the DI pump system uses a piston style pump with check valves being pushed by the camshaft. There is no lubrication for this piston. So having a bit of extra lubricating properties in there will help it last longer over time when using E85. Hence the 2stroke & lucas additive in my use.

There is a lot more that goes into a flex fuel car than people think. E85 is however fantastic stuff when tuned correctly. I also plan on going back on E85 very soon here when I get my new motor in

[nelsmar]

PS my favorite solution for my chirping issue was removing my intake snorkel which made my blower lower. No more chirping.

[captain_jack]

Originally Posted by nelsmar

Just to be clear: E85 requires a new tune.

E85 increase corrosion to many materials, especially if the fuel has been exposed to an atmosphere with moisture in it (as in any humidity, and even if its low) has been sitting for a period of time. This water absorption will be corrosive to the engine. Also the water absorption can add corrosion and wear to our cylinder walls as our cylinders lay flat. Any minor bits of moisture left in the chamber after the engine is shut off will settle in the bottom of the cylinder and cause wear. Typically when i shut my engine off I rev it up and kill it at a higher RPM to "flush" as much fuel supply as possible out of the engine. I tested that it was doing something when we had a poor fuel enrichment for my start cycle making it difficult to start. If i killed the engine normal it would start up fairly easy, but if i rev'd it a tiny bit and killed it it would take about 2x as long consistently to start up.

Ethanol also does not have the lubrication properties of gasoline (petroleum!). Gasoline naturally lubricates things such as fuel pumps, and slightly helps in lubrication of the rings on your piston. Simply adding something such as 2 stroke oil, or lucas e85 additive every once and a while (or every tank) can help. I typically added a few oz of it every 10 or so tanks, i meant to put small quantities more often but i just never got off my ass and got a small bottle that was easy to keep in the car.

Also long term affects only time will tell. I put ~ 6-8k miles on high ethanol content and show no signs of wear.

And no I wouldn't recommend E85 just to fix the chirps FYI. It is surely just a coincidence. But do keep in mind the DI pump system uses a piston style pump with check valves being pushed by the camshaft. There is no lubrication for this piston. So having a bit of extra lubricating properties in there will help it last longer over time when using E85. Hence the 2stroke & lucas additive in my use.

There is a lot more that goes into a flex fuel car than people think. E85 is however fantastic stuff when tuned correctly. I also plan on going back on E85 very soon here when I get my new motor in

So new motor ordered yet?

sent from your mom

[nelsmar]

Originally Posted by captain_jack

So new motor ordered yet?

sent from your mom

I will be ordering parts throughout the week. I am just trying to decide if I actually want to go full-retard and do a higher compression turbo build =x contemplating ordering custom 11:1 CR pistons. ARP is still finishing their head studs so I'm trying to source some... might end up just treating some OEM's though if i want it together asap. Custom pistons are a 6 week wait, but i know someone with a great price on 10:1 CR sitting in his shop.

I called to get a shipping time estimate on a short block from a subaru dealer on the E coast, looks like it would be here in just under 2 weeks.

[Cross]

There are also a few other things to consider on E85. The idea of it eating fuel lines is actually more of a confusion with Methanol but Nelsmar is correct Ethanol will attract moisture.

However something else you should pay attention to is the fact that E85 also seems to have some issues over time with Injector build up and last I checked they were not exactly sure what was causing it. I have it even on my Vette and its been talked about on many forums, here are some from the Evo side of the house:
http://forums.evolutionm.net/e85-eth...nk-e-85-a.html
http://forums.evolutionm.net/e85-eth...k-seafoam.html

Its been awhile since I looked but I found just running a tank of gas cleared the issue or cleaning them manually which was not hard for me either. However the Gunk would get to the point it was really bad as you can see from some of their pictures.
Here are a few from mine over the last few years running E85:




This is not meant to scare you, E85 is something I run in my FR-S now and will always run in my Vette. Its a great fuel but it does have some concerns you need to address and this is one of them especially if you boost it.
However N/A and FI E85 can do wonders if you do things correctly. Keep things clean and find a solution that works for you in regards to cleaning. Even if its just running a tank of gas every so often (Easier for the N/A Guys I know) or a good cleaner if Seafoam works.

Just thought this was worth sharing as well. I personally love E85 as is apparent from it being used in both my vehicles. But as with any performance modification there are little things to be aware of. However the grin it will give you and the extra boost is always worth it in my opinion. (Not to mention the cooling effects, high octane rating etc)

[nelsmar]

Last time I saw a discussion on the gunk it was assumed deposits in tank, and possibly the fuel lines. As E85 can corrode the plastics its just much less than methanol. The moisture is the corrosive property, methanol can absorb up to 6% of its mass in water, vs ethanol at 3% which is why it is much better in a system like this. The oem fuel system is designed for 10+% ethanol but not tested long term for high ethanol. To be 100% perfect you should ideally get something like a stainless fuel filter, a compatible pump, compatible injector seals, the tank teflon coating must be perfect, and you can use a goodyear R9 line that has i forget but i think a teflon inner coating? that will not corrode from the E85. Some plastics and metals can get corrosion from E85 as well. The fuel systems in a flex fuel car is a tad different than a street car. But in real world practice... 100k miles on E85 on most platforms wont get to the point you spring a link in a fuel line or anything like that. Methanol on the other hand... much more corrosive!

<3 E85.

[nelsmar]

Also cross im uber curious to see how my injectors look right now! I haven't ran a tank of pure gas in a while... I've gone down to ~ 55-60% for a test but went back up to 70+ pretty damn quick. I should send the gunk off for analysis and find out what it is!

[SirBrass]

Originally Posted by Yruyur

Purge. I do it every couple years. If you have not used it in that long then it's mostly just stuff. Fly back and get any items you may want. Have a yard sale or use a consignment place and let them sell the rest. Use the money to either pay for the trip or just buy new stuff.

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I've got boxes in my apartment that qualify as that. Haven't dug into them in years. Need to purge, DEFINITELY! I need the space more than the money.

But back on topic: the chirping.

What is it about the HPFP that causes the chirping? Could it be how the fuel is flowing through it? Would it be possible/feasible/economical to somehow eliminate it from the fuel flow system without screwing things up?

[Cross]

Originally Posted by nelsmar

Also cross im uber curious to see how my injectors look right now! I haven't ran a tank of pure gas in a while... I've gone down to ~ 55-60% for a test but went back up to 70+ pretty damn quick. I should send the gunk off for analysis and find out what it is!

They did that in the Evo thread even had a guy able to replicate it on a bench. I was pretty sure they ruled out gunk in the fuel system sense Evo's are not old vehicles and many commenting on this were quite low mileage.

I never followed back up on the cause but I can tell you my new Vette that has been completely gone through and is a completely updated setup has the same issue on the injector tips.

On eating the lines I am not so sure I am as concerned (just as you stated). The gunk in the fuel system though I question esp since it has to go through the fuel filter to before getting to the injectors and then the injector cap filters which also I believe don't show signs of the residue its only on the injector tips.
Anyway though I was saying on fuel lines a few owners across different platforms (Suby, Toyota/MR2, Mazda, etc) did a few tests with this to include leaving lines of stock used fuel hose from a 91 MR2 submerged in E85 for a year with no wear as well as running one off E85 for a year and showing the results of the filter and lines.
I do agree the water can be corrosive but I don't think there is a huge problem with many vehicles at this point in time that we are using now. But again this is just my opinion from a few years and different cars of constant use. I am by no means completely right I am just stating what I have come across in my use and time looking into using it before I pulled the trigger.

Seems we both are E85 nuts

[nelsmar]

Yeah the damage seen has been pretty minimal. Someone really needs to drop some o four components in a tank, or wire up a pump to have it continuously pump through some lines for a long period of time like they did for the other cars. No concern here, i may eventually toss in another filter under the hood just incase that stock fuel filter falls apart over time though.

And yes ohm nom nom E85 ALL THE THINGS!

[ChandlerSwyng]

Is the coffee rush basically just a mini meet?