blown 944

glad you got it to the track at least My first time up to the track was rained on as well. I may go back up this wedsnesday to try to improve my time (please remember I'm at a high elevation so there is a difference )

I'm sure that with any confidence in the shafts in the future it will perform better (not that that isn't good)

blown 944

BTW what are you running for fuel?

95ONE

110 octane. Waste of fuel yesterday.

blown 944

If you get a chance and it is avail in your area you might want to give E85 a shot.

I have ran blown alcohol stuff for years and it always made more power than the top dollar fuels.

E85 (ethanol part of it) does a very good job of holding off detonation and allows more more agressive timing.

I have ran it in my 44 for a coupel of years with no illl effects. I now have been running it in my 951 on high boost for a couple months now and it is great considering I can run 18 psi all day long at 2.20 a gallon

special tool

Have any geniuses written the optimum AFR for boosted E85 engines yet?

lart951

drifto?

blown 944

Not a genious but

I run mine at about 10:1 safe so far

I run it leaner when cruising

I mainy watch the EGT's and try to keep them in the 1400-low 1500 range.

I have however, ran as high as 1620 w/o burning anything but I think that is pushing it.

blown 944

?????

95ONE

Then your timing must be stock. 10:1 is not safe. E-85 stoich is 9.7 / 1 - Not to be confused with Pure Ethanol @ 9:1

You need to run a lambda ratio of around .8 so.... AFR of 8:1... As a percentage..... You have to run 40% more fuel. Ethanol is extremely forgiving compared to pump gas when it comes to running rich. You don't lose much power. But NOT forgiving on a lean condition.

Basically... Double your injector size. You should be fine.

Timing advance need to be considered also. Keeping with same guidelines as 105 octane should be fine, but more advance is usually possible.

blown 944

actually the ?? was meant for Lart

I am not worried at all as to how to tune my setup as I have ran it for some time

I have not needed to double the injector size .......just run more FP

My 951 still uses teh 42# injectors right now but needs some bigger ones at the higher boost levels

I drive it everyday and before that drove the supercharged 44 everyday for a year on it.

I may not be the sharpest tool in the box but I know I haven't burned anything using my tunup yet

I thought that actually running it and boosting it would add some credibility to my theory above just theory but I guess theory still prevails

Like I said, I mainly tune using EGT and generally run rich so what I posted is at the very leanest it would see.

Personally from what I have experienced there is a lot of mis information out there regarding this fuel.

I have ran it (ethanol) for years in my drag stuff (mid 8sec all the way down to friends low 7 truck and even down to a low 6 sec nitro coupe )


sometimes real world testing works better than what gets published

95ONE

I HEARD THAT! Tell me about it. Awesome info. I've been schooled and am happy to learn. Everything I read on the internet says 35-45% more. (Read Megasquirt support pages as proof) Buttt........some Circle track guy told me it works best with only 20%more fuel. I wanted to beleive him, but it's hard when everything you read on the internet. (I'm in trouble on that statement) contradicts.

I appreciate your honesty and have found myself in your position (rowing against the flow) many times. I know from what I've read. the Octane rating is close to 105, but the It's cooling effect makes a larger difference than most people give credit. But, I'll still probably tune to .85 Lambda just to be safe!

95ONE

Do you have much access to E-85 up there?

There are only 2-3 Stations that sell it here in Houston. By the time I get there and back. I'm out of gas!

blown 944

Not here to School anyone

speaking of "rowing against the flow" I find I don't even pay attention to the current's direction anymore life's easier that way for me. Otherwise I am always defending something

I'll throw some real hard numbers out here for you

I get 440-450 miles to the tank on E85 boosting to whatever I choose (I do so every day at least once)

I got 480-500 on std fuel with boost imited to 15 max

Now if I were to run the boost I currently run with good fuel it would cost over 200 each fill vs 40 for what I have now

It was simple for me to make this decision

blown 944

We had only 3-4 stations around the metro area now there is one on my way to the shop so life is GOOD

special tool

Haven't seen it, but I haven't looked.
I would be anxious to dyno a high boost e85 run at proper tune to see how it does.

What turbo are you using - you left that out of the sig.