[severous01]

what i'm looking for is a fuel alternative, and alcohol is only at 2/gal right now. that's going to be about half the price by the end of the week. if i don't have to do much i'd like to run alcohol. there are many benefits to doing this, just a few: runs cooler, burns cleaner, doesnt detonate, cheaper...just for a few pluses.

any way, what needs to be done to run alcohol? fuel filter change? pump change? timing changes? injector changes? ECM changes?

[sgarnett]

I disagree on the O2 sensors. I'm a bit out of my element here, but this is my understanding FWIW.

The sensors are actually "lambda" sensors. What they sense is really the ratio of actual AFR to stoic, not absolute AFR. The stock sensors are narrowband sensors designed for lambda=1.

If you change fuels, the sensors will still switch at lamda=1 for that particular fuel (ie at whatever is stoic for that particular fuel), which is NOT necessarily 14.6.

The problem is really that the PCM interprets lambda=1 to mean an AFR of 14.6, and all the fueling calculations are based on 14.6.

So, you would probably need new injectors, and you would probably need to recalibrate the PCM (significantly), but I don't think the O2 sensors would be a problem.

However, in the LS1 PCM there is a single table entry to specify the stoic AFR for the fuel, and everything else is scaled from that. The stoic setting and the injectors tables would obviously need to be changed, but everything else may just fall into place.