TeamRX8

iTrader: (25)

oh, you didn't embarrass yourself enough the first time?

b2fast007

nope people like georgia8er make me look like Einstein.

Arca_ex

iTrader: (10)

Why are we talking about alcohol, thought this thread was about E85.


E85 doesn't burn invisible like alcohol. I would never use alcohol at the track...

TeamRX8

iTrader: (25)

nothing like digging up a 5 yr old thread to make an argument using misinformed statements, including calling yourself Einstein for doing it .. lol

b2fast007

I have been making my own racing gas for my 650 sx jet ski for 15 years now and think I understand ethanol pretty well. I also think I have a better grasp of what is needed to denature ethanol so it burns with a visible flame. Since you are so smart on all things alcohol related why don't you tell everyone here how to purify 190 proof ethanol to 200 proof ethanol. Cause you know right? The blue flame argument is why cars were switched to gas in the first place if you know your automotive history you would have got that comment for what it was. A historical quote used as sarcasm but apparently you didn't understand the( bad rep and lack of respect part.)

9krpmrx8

iTrader: (46)

Bump.

Does anyone think the stock fuel pump assembly or rubber/plastic (not sure what it is actually) part of the stock fuel lines would have any issues handling E85? And would the pump itself need to be E85 compatible? I can't see how any of these items would not do okay with E85, just wondering what some of you guys think. Also, I am wondering if the stock injectors (I have blues in the P2 location) would be able to handle the E85 from a flow perspective?

Thanks.

GK1707

iTrader: (10)

https://www.rx8club.com/series-i-eng...-247223/page4/


This guy did it on stock injectors and I'm guessing stock fuel system aside the pump. Longevity I'm not sure about though.

Harlan

iTrader: (3)

The stock injectors are not the best for e-85 I've seen them rust a bit internally from pure water use, but the subie guys seem to have good luck with them.
Some light reading:
E85 fuel FAQ - NASIOC
Also a good injector reference:
Injector, Fuel Pump, and Fuel Rail FAQ: Read if you are thinking of upgrading! - NASIOC
We use the same injectors as the 02+WRX.

Hope that helps a little.

TeamRX8

iTrader: (25)

I couldn't run full E85 on mine with a newish OE pump without it leaning out on the top end. Others gave done it though, could have been an undetected problem on mine or maybe they were making less power, or maybe it was a tually less than 85% ethanol. I had to dilute down to approx. E60 ...

yomomspimp06

I run a 3gal mix when someone calls me out... 16psi with 17*timing at redline. not a good combo for 10:1 compression on just 93. otherwise, I run 10psi with 93. Stock pump(walbro 255 is here, I've just been lazy and pushing the limits) stock yellows in primary and uncapped for the rest.
9k, thus the reason I ran away from those guys like I did in the vid you saw via FB

9krpmrx8

iTrader: (46)

Thanks for the info guys. I have a newish Walbro, I see a solid 60psi thru the rev range. I was just wondering about the stock plastics and such, like the filter sock. The lines and such would likely be replaced with AN fittings/adapters and braided line that is E85 rated since we have the tool to make them. The tuning and such would be handled by Steve Kan and I would like to run E85 fulltime.

slash128

Stock pump is good to 10psi? I'm only running .3 bar spring on stock pump, wasn't sure how much it was good for to start pushing more. Same injector setup as you. I still have my Walbro, but I consider all my old fuel system suspect and resist the urge to put any of it back in. I was contemplating a DW200 as a replacement, but if the stock pump is good that far out then I'll probably stick with stock for awhile.

yomomspimp06

I haven't had any problems, but I also don't have a fuel pressure gauge. I just know that I hold commanded AFR without a hiccup. I didn't think anything over 10 was going to be possible until I read about Kane tuning a guy on the stock fuel system at 14psi. I decided that day I would be adventurous. It's paid off so far. *note* your turbo outflows mine...

slash128

Cool, appreciate that. I guess I will just have to see how far I can take it. I like pushing envelopes, I just needed some encouragement

TeamRX8

iTrader: (25)

Put a boost a pump on it with a boost switch. Others here have poo-poo'd this, but they use it with good success on RX7Club.

I intend to run one with a vacuum switch on my NA E85 engine

Otherwise its an OE pump, so you never know. I never had a problem though, gas or ethanol.

Walbro makes special E85 pumps though, not recommended to use their gas pump on it. Injectors can be an issue. Some pintles can rust/stick if moisture gets in the system and they sit unused too long. The ID1300 injector has a stainless pintle just for high E fuels.

E85 requires 30% - 40% more flow than gas due to the stored energy difference, so your entire fuel system needs to have this additional capacity at a minimum ...


.

GK1707

iTrader: (10)

E85 Pre-Mix - RX7Club.com

Also some good reading on pre-mixing for you guys on E85, if you guys don't already lurk on 7club like me.

DAT2RTR

After reading this whole thread from the beginning i dont understand why there was so much arguing in the beginning. Other than no-one knew a damn thing about E-85 when it came out.

It seemed like there were a couple different arguements going on at the same time but no one was on the same page, Power v.s. fuel economy, cost v.s. efficiency, when the OP just wanted to know what would have to be done for an E-85 conversion.

Whenever we (going to go into subaru land for a bit here) have a car come into our shop that the owner wants to run E-85 on they almost always change out to a higher power fuel pump and bump up an injector size or two. Most people around here run 1000CC injectors depending on other supporting mods. They have our local tuner make a base map to account for the bigger turbo, intercooler, injector size, usually aftermarket catless up-pipe, and whatever intake they run on there, street tune the 91 map, run the car out of fuel, fill on E-85 and then make another tune. Have both maps available on the accessport or whatever interface they decide to use to make the changes.

Why is (was) this such a hard thing to expect out of our motors?

I mean yes, without bumping up compression and/or running FI there really isnt a reason to make the switch to E. You could possibly grab a few more hp with good tuning and the right supporting mods, along with having your egt's be a good bit cooler. But for actual good reasons, meh.

TeamRX8

iTrader: (25)

well ...

It probably has more to do with someone reading something on teh intrawebs and then repeating it like they have direct knowledge of something that they don't ....