The "gummin" is from "gum" that was there already. It is a solvent.. Much more mild than Methanol but still cleans the fuel system... It kicked loose crud from old dirty + leaded gas..

 

Didn't realise this was on the DSM. Thanks for the great info!

 

yeah what happens if you run this stuff in our cars with the stock injectors & fuel system? Like what would happen if I used it right now?

 

If you run on the ragged edge of a tune, then you'd have to retune. As mentioned, it has more oxygen in the fuel, and thus, helps to lean the car down.

 

So all you have to do is richen the car up for the new fuel? Does it have any other effects on the car? Any negative side effects?

One person mentioned this fuel gets much less mpg and another said they actually got increased mpg. Whats the truth on this?

 

You definitely decrease mileage, and you can definitely make more power with ethanol. Tuning would not be quite as simple as just richening up the mixture. Your startup enrichment would be different (worse in colder climates), and you would need to change the timing tables to help take advantage of the higher octane rating and slower burn characteristics. I would guess that since egt's should be lower, I think the alcohol isn't as harsh on exhaust valves and cat converters. Storage can present a bigger challenge than gasoline, however, as alcohol readily dissolves water.

 

Just wonder if the dcreased mpg more than offset's the difference in price. Even if it equals it and turns out to cost about the same per mile of driving, you still have the benefit of the increased power as long as your car is tuned for it. But if its only like a 10 or 25hp increase and it costs more per mile it wouldnt be at all worth it b/c it's an ongoing expense. It's not liek you can just throw it in occasionally like normal race gas, since your car has to be on a totally different tune to use it.

 

How do the new cars (trucks) do it? My 2004 Tahoe is setup for both. I have never run the E85 since I dont have it around here close, I understand I have larger injectors but is there a dual tune that will compensate or do I just always run rich might explain the poor mileage, well that and it weighs a couple tons...
Dave

 

Depending upon your power levels you may very well have to upgrade injectors and pumps too. Read the whole thread, or at least the first post by DSM.

 

Interesting stuff, too bad there's none in my area, my GTP would probably love it.

Oh, and V8_DSM,

About your sig, an RX7 GTU is a base model, it has the 5 lug pattern, but single piston front brakes, and non-vented rears.

Also, the viscious (S5, 89-91) rear end is the less desirable vs. the clutch type, as the fluid shears at low-moderate power levels and they aren't rebuildable. S4 clutch type is what you want. An S4 GXL would be more what you're looking for. Good rear diff (though it's the smaller 7" vs. the 8" in a TII), 4 pot brakes, yada yada. That, or swap rears and rotors/calipers on an S5 GTU (or get the more rare GTUs with the crappy diff and bad ratios).

Sorry to go off topic, but I saw that, and I'd hate for you to get the wrong car-

 

FFV's like yours have a fuel sensor. It uses capacitance and other measurements of the fuel passing thru it to determine the fuel mixture and adjust the fuel and ignition maps accordingly.

It tunes itself for the mix be it normal 15% now 20% mandated oxygenated (eth) fuels or 85% ethanol.. It reads what is flowing thru the line and tunes for it.

I am working on getting these sensors and figuring out how to use them with a AEM EMS.

 

I have seen E85 as low as 1.57 and regular at 2.37..... The market changes periodically. Compare the E85 to the closest race or aviation fuel and see what you are saving.. When tuned correctly its only about a 3-4 Mpg difference...

Now If I dont keep it below spool RPM... Well I can almost watch the needle move.... If you are'nt burning fuel you are'nt making power.....

For 85% you only really need 40% larger injectors... For E98 you need 66% larger.... Methanol is the one where you need like 2.33x larger or so.... Its not that bad at all...

 

Thank you... any info on the convertables... I might get one of them... It will get a full cage... I have seen some nice drop top cages on the best cobra kits etc.. It can be done nice...

 

'verts all have the TII brakes as far as I know, I don't know about the LSD though. I do know they have the smaller 7" ring gear of the N/As, and the LSD will definitely bolt in. I'll ask my friend whether or not a LSD was stock in them tonight and post up for you.

 

I would imagine that you would need one of the aftemarket ECU's for our cars as, if you have it tuned for this E85 and then put high test in ya are gonan have a flood on ya hands. Another issue i see is the size of injector ya need. I have 42#er's in my car now and make 530 RWHP. The injectors are pretty much maxed. So to make this work, atleast the way its being explained i would be kaxing out 60#er's also if i had a E85 tune. The size of the injector woudl be retardedly huge to go above 600 RWHP. So as much as it is a cool idea it really is a race only kinda thing unless you got too much money to burn. GL


John

 

"High test"

Sorry..... Thats like the 60+ crowds words for high octane around here.

Actually... You would need 80lb/hr.. Hmm Each cylinder with 80lb/hr... My car has a 160lb hp on each cylinder.....

Some of you domestic only guys need to bone up on stuff like this..

http://www.amazon.com/exec/obidos/tg...62253?v=glance

4's.. V8's, V12's.. BBC's with quad cam batten heads. Supercharged, turbocharged... Alot of different example projects... One thing for everybody.. How to modify EFI to make more power... From injectors to sensors to trouble shooting... A big name tuner who twin turbo'd a tesstarossa and ran it on ethanol and it passed cali smog!

 

I need to include this link to a conversion guide..

http://www.westbioenergy.org/reports...5019_final.htm

 

runnign e85 you can burn twice as much fuel my buddy runs it in his turbo 240sx half the price but you burn around twice as much of it

 

You are way off on those comments

No way do you burn twice as much......

No way is it half the price.

It is about "fity cent" less per gallon as compared to 87 octane.

When I am off the boost and cruising like on CC or something its about a 4mpg loss...

When I am boost happy at WOT its about 30% to 40% less depending on what gas it is being compared too... 40% less mpg than race gas but more power.. 30% less mpg than 87 but way more power.

 

All the info you need is here: http://www.e85fuel.com/index.php

It isn't wise to run E85 on a car that wasn't designed for it.