SAC-CA-GTI

Geez man...you need to go out and drink some brews with us one night. That is funny sh*t

Mike2kS4

<center><img src="http://journeytoforever.org/biofuel_library/ethanol_manual/z-image/fig2-5.jpg"></center><p>
AFAIK we're getting 90 octane gas with 10% Ethanol added to bring the total octane to 93.

The problem is, Stoich for Ethanol is much richer than Gasoline (I hear 8:1) so your overall mixture must be substantially richer than 100% Gasoline. Also, Gasoline has 124% the energy of Ethanol.

On paper, It looks "OK" but in practice it's a giant ball of suck at higher cylinder pressures. As the chart above illustrates, these are two vastly different fuels, with Ethanol having a very narrow effective AFR range.

This problem has affected multiple vehicles, even NA ones. One interesting item of note: LS1's running hypertech programming are now experiencing audible pinging and now must run in stock-mode. Hypertech squarely blames the fuel and has no solution as of now

jprice@CPS

Basically.. it's a huge scam IMO. The government subsidizes it, and the only benefit is to the corn growers association, who interestingly enough lobbies behind all the ethanol blends of anything.

Snow Trooper *Swiss*

everyone dial out some boost or in some fuel.......

Mike2kS4

You can also pull around 5deg timing.

I've had to dial out boost and in fuel for my setup.

jprice@CPS

I typically end up adding 3-5% w/ lemmi when I log folks here w/ 10% ethanol.

Mike2kS4

My car is running crazy cylinder-pressures so I've had to add 10% fuel. I figured a more conventional stg3 would need half that since it doesn't seem to be a linear relationship.

Anyhow, good info.

krypt0

haha! nice

Milpitas2.7T

That's funny!!!