I know the walbro pumps are not fuel safe for long term e85 use, but is buschur's pump ethanol safe?

 

Not sure.. And I was under the impression the Walbro is build to OEM spec, which means it uses Nylon, Delrin, and Neorpene which is all E85 safe...

If thats the case, there are higher output Denso pumps that are Ethanol compatible.

 

I'm not sure how much more flow I am able to get out of the White Rabbit over a stock turbo, but with the White Rabbit 780s were not big enough with a single Walbro. That was running ~25 psi at 7000 RPM. If someone were to really push a stock turbo, 780s would probably be the smallest injector they could get away with. I was very surprised at how much fuel I was using.

-Paul

 

This is really good information. I am going to be running E-85 with a 35r when I get back from the Middle East. Where can I buy a duel pump setup for intank?

 

There are two that I know of, one is a machined aluminum part that isn't "plug and play" and the other uses a stock pump assembly as a core, so the wiring harness and all fittings plug right in.. Buschur Racing offers the plug and play setup, the only real modification is the inline filter, and relay/boost sensor to kick it on.. I will be using the Buschur setup because it doesnt require a huge amount of work to get installed.

Oh and it had come up in another conversation that Walbro pumps may not be E85 compatible. I actually think it is since their all designed to OEM specs which means they have to be Ethanol tolerant because we already have ethanol in our gas.. But keep that in mind.. We would need to get absolute confirmation from walbro directly..

 

I run a BR pump in my WRX. Its a "modified" Walbro, so I would guess its only as compatible as a walbro would be.

 

So I'll plan on going with the 880's with a walbro 255 pump. That should be enough for E85 with a stock turbo and not so much overkill for my 91 (travel) map incase I ever need to drive the car outside the E85 availability area's. The nice thing about the evo's compared to my subie is the injectors are twice as nice when it comes to price and twice as easy to install. So if i go with a bigger turbo I can just get the big guys at that time.

I visited the station with E85 this morning. Its 2.38/gal here is Las Vegas. Not too bad considering 91 is going for 2.67/gal right now. The manager says they have only run out of it once in the last year. But there is 5 other stations who have it within 20miles.
http://www.e85refueling.com/

So, IIRC, I should also plan on replaceing the fuel filter after the first tank of E85 and then after 1k miles?

but wouldn't it be hilarious if they started to make E85 from rice?
"Rice burner" would no longer be a negitive statement.
Or if Cobb tuning would come out with a E85 map called "Corn on the Cobb"

 

rotfl

 

Hey, ethanol can be produced from nearly anything.. so I wouldn't be surprised..

And YES, expect to have to replace the fuel filter after you run through a tank or two of E85, as it pretty much cleans everything out...

 

The reason why it’s not good to run E85 with in tank pumps is because ethanol is a conductor of electricity. Gas is not. You would really need to go to an external pump to run E85. Bigger injector is a must. But it’s very doable. And most wideband will compensate for the E85 air fuel. You will just need to make changes to rich up the car.

 

Gasoline conducts electricity, only not very well (It is considered an insulator however according to the DOT).. Besides, Gasoline already has 10-30% Ethanol in our typical premium blend fuels..

 

http://hazmat.dot.gov/E-85_042606.pdf an interesting bulletin...

In that doc it says its an insulator, at 12v, I would say your correct, gasoline would likely not conduct..

 

True. But Ethanol is much more conductive. In IL we only have up to 10% in our fuel. Every dam state is different. I think running Ethanol is a great Idea, but I don't think E85 is good for in take fuel pumps. All the GM cars that run E85 have external pumps.

 

Yeah I wonder how that stuff will pan out.. I have no problem going either way as its determined.. AFAIK many cars have already been converted without changing to an external pump and have had no issue that we've heard of.

 

Added a gallon of E85 to 6gal 91 premium when the "e" light had been on for 23 miles. Was going to go log it but my evoscan was acting weird and trying to reload the install program. I''m going to have to DL the new version and a copy of excel all fresh when I have some time off work (hospital 13hr shifts). Otherwise the ride to work seemed fine. Although I have the boost turned down to 18psi peak, I couldn't feel any timing retard. I have a 91oct modified BR reflash on the high maps. First baby step in my advances toward E85 and all is well.
I'm sending the tranny to TRE this week so I'll be down for awhile.
Keep me updated on all the new findings.

BTW if you happen to see a good used set of 880's for sale hit me up.
Thanks (need a walbro too, my old WRX one woulnt fit)