As for now shoot for the same AFR's on boost. You could get away runner a little leaner due to it's cooling properties but only further testing would show the actual limits. From my findings I do know you can run a littler leaner off boost during cruise/idle etc.
The same principles holds for ignition timing also.
E85 useage is pretty much new especially for rotary applications so all the facts/myths will eventually become known as they are discovered.

 

Just another interesting article.

http://www.e85forum.com/about621.html

 

thats pretty cool

 

I currently have my engine torn down for a re-building. As I am considering E85 because of the 91-octane limit my state, I read through this post. I noticed your question didn't really get what I thought was a good answer, so I hope this helps. Here's what I think I know. The country is divided into zones relative to summer winter blends. For example, where Cris lives in Florida, there is no need for a winter-blended fuel, however where you live I think it is likely you do. Each state should have a petroleum marketers association. They are usually a good resource in getting this kind of information. The other factor relates to whether you are buying branded or unbranded fuel. Not always, but most often, a branded station (Shell, Mobil and the like) has more stringent requirements for their marketers and retailers. Because E85 is not a mainstream fuel it does not always fall under the same umbrella however, even at branded stations. Unbranded stations may be more likely to 'cheat" by adding more or less ethanol, depending on the market cost, which changes daily. I mention this is what I think. I oversee 4 Shell branded locations in my state, and have been in the fuel retail business for the past 13 years. Like you, I am trying to get my arms around the issues with E85 fuel in a rotary engine. Unfortunately, I believe Cris hit the nail on the head when he said no one really knows yet. There simply has not been enough time go by to measure long-term effects. Again, you might ask your local retailer for the contact information for the petroleum marketers association in your state. They should know it, especially if they are a branded location. Most are members.
Sorry for the long post, I hope this helps someone.

 

thanks crispeed!

I think is something I'm going to have to do. My car sits all winter and through any rain or snow, so it's really only driven on weekends in the summer. If I change it once a month during the running months, thats only 3-5 times a year, which is less than my dd!

 

Video--->
http://site.awdmotorsports.com/Videos/adturbodyno2.wmv
Right click and 'save as'.

Dyno


Sorry about no rpm reading but we could not get a stable signal.
The two runs above were done from 3k-7.2k rpm.
The first one was done at 28 psi which was the max we got on the present wastegate spring.
The second run was done at 29psi+100hp nitrous shot.
We had to lift early on the nitrous run because the fuel system was maxed and it started to lean out

Alberth's S-2000/2jz specs.
Stock JDM Aristo 2JZ motor.
Precision PT67/P-trim turbo.
C4 trans with 4K stall and T-brake.
1000cc inj/twin Walbros.
AEM ecu.
E85 pump fuel@$3.60 per gal.

 

BS, s2K's can't make no power !

damn, and that power through an auto ? nice

 

7.20's on E85 or 1,600 whp on E85.

http://videos.streetfire.net/video/1...big_147461.htm

 

They just opened an E85 station 5 min from my house. I spent quite some time reading all I can about E85 in the last 2 days.

Right now I am paying close to $20 a gallon for C16. The cost for E85 is $2.99 a gallon. From everything I read, it looks like there is no reason to use C16 at the track anymore.

I run a max of 30psi at the track and have four 1600 cc injectors. The TEC unit has a setting (POT) where I can add up to 50% more fuel if needed. I will know soon enough but do you think I can run 30psi with 4x1600cc injectors on E85???

Thanks,

Anthony

 

I think you're going to run out of fuel, and quick.

 

Could also add ~30% to the VE table across the board, no? Obviously might be better to get the POT and IOT closer first...but it should work.

Taking into account 30% more fuel, I plugged 30% smaller injector size (1120cc) into the rx7.com fuel calculator and come up with 541bhp. So it would seem with those injectors you'll be a little limited. EDIT: I used an 80% duty cycle max for that calculation.

 

With the VE table, you can only add or minus 50% but when I set my base map I set my POT to O and created my base map around a "0" POT.

I'm curious to see what rotaries are running E85 at the track.

Anthony

 

Anthony, if your're serious. Just have a few $10 bungs welded onto your intake for two more 1600's. One tank of C16 will pay for the injector upgrade.

 

Just got my car fired up, so mark that down as another RX7 on E85

vid

 

Just a FYI, I ran the car again late this afternoon for about 3-4 minutes to let it warm up. I put my hand on the top/center iron of the motor. It was luke warm and I can't say that it was any warmer than before I started it. I must have alot of E85 pumping through that little motor.

 

"Alcohols burn more completely because their molecules contain oxygen".

This is not true. When molecules burn, they do not instantly combine with oxygen in a single step. They keep breaking down into smaller and smaller molecules until they reach a point where they are totaly oxinated(burned up).
Alcohol being a small molecule breaks down faster and easier and thus burns more completely.

Agents like Halon 1201/1302 stop combustion by interfering with this break down process. CO2 works by eliminating the required O2.

 

More E85 magic.
E85 supporting 712hp at 40psi with a 62mm turbo.
http://forums.evolutionm.net/showthread.php?t=369398

 

UPDATE!!!
Now at 799whp resulting in a 5.92@120mph with a 1.51 60ft in the 1/8th mile!
Not bad for PUMP GAS!

 

Very nice! I think i'm going to make the switch to e85 this winter.

 

Damn crispeed, you're gonna be the official E85 Tuner!!!!!!!

That car woke up on the bottle! ! !

I thought you said you were gonna tune a rotary car on E85 this week?

 

Hey Crispeed, I'm looking at installing a GM Flex Fuel sensors to compensate for the different winter-summer variants of E85. It's the only way that I'll be comfortable with my maps since I'll be able to use one of the M4 compensation tables to adjust for different ethanol-gasoline rations.

I haven't read much on this Forum (though a little on the Evo Forum) about the sensor. Since I'm not looking forward to the adding more plumbing/wiring to my project, I'm very interested in any experience or insight you might have before I go down this relatively untraveled road. Inquiring minds want to know!!

 

Well if you've been on the EVO forum you would have seen the guy that developed the monitor/gauge for the sensor also.
One of the advantages of living in florida is very consistent fuel. Well at least consistent to date.
E85 have been the most consistent fuel I've ever used down here.
The people up north in the colder states have to deal with various levels so the sensor and the monitor is a required item in my opinion. Having the right ecu that trims fuel and ignition maps etc. based on a 0-5v signal is another plus. I know you do and so do I!

 

Are they having good lunch with that sensor? It seems like a pretty cool piece of equipment and a definite requirement for people running E85 in the colder states.

 

Here's the EVO in battle!

A video of the EVO racing a built C6 Corvette on nitrous and supercharged making just over 1000whp on a roll from 60-160mph.
http://www.youtube.com/watch?v=89Y-_s0UmBQ
A quote from the owner of the vette after the race.
'The EVO is just plain fast! He beat me square! No excuses!
Not bad for pump fuel!

 

First off, thanks goes out to Cris for leading the charge on this subject.

Secondly, I believe I'm going to try my hand at this sooner than later on more of a "street" fc. I am just going to simply throw 30%(exactly 30% to start..) more fuel across the board and tune thereafter. Also going from 1oz/gallon of premix (simply whatever TCW3 premix I can find..) to 1.5 or so simply to add a bit more lubrication.

Here is my setup:
S4 TII, street ported all s4 motor
Haltech e6x
Innovative LM1 wb
cleaned, flow tested stock 550 primaries
1600 secondaries
stock fuel lines, pulstion dampener..
Walbro 255
T04e
fmic etc..

Currently running very strong on 18 psi with 92-93 octane. I would estimate it at around 350whp or so..never been dynoed.

I simply want to run about 25 psi and not have to run race gas and have ridiculous EGT's.

Any obvious flaws in this approach?
Anything to address before jumping in head first?

I plan on saving my current map. Putting in a few gallons of E85 and giving it a go and see what happens...and then if we aren't able to get it running properly after a couple days simply drain the tank and simply pretend it didn't happen.

I also believe our pumps will be at an E70 winter blend at the moment..