Re: Why is the supply of E85 fuel so tightly controlled?

In article <MPG.228664ae4c6c7e8b989e31@[EMAIL PROTECTED]
>, 
carl.robson@[EMAIL PROTECTED]
 says...
> In article <MPG.22804077cd51d635989765@[EMAIL PROTECTED]
>, 
> alb_mandctdNOWMD@[EMAIL PROTECTED]
 says...
> > Probably because E85 will toasr any engine not made to run on it. 
> > 
> I doubt it. It won't cause pre-ignition because it is a higher octane.
> It may run lean if the engine sensors/ecu don't have a wide enough range

> of adaption, but it should still run even if the ecu goes to limphome 
> mode.
> 
> Older carb cars would have less issues as long as there is enough range 
> on the mixture adjustments/jetting.
> 
> Only issue might be if the ethanol reacts with any existing metals or 
> plastics/rubbers in the fuel system. It is still a spark combustion 
> fuel. 
> 
Regarding running ethanol, I simply don't think burnt valves, holed 
pistons or cracked heads would improve performance or emissions. Not as 
bad as methanol though. You MUST make changes to timing and jetting to 
run alcohol fuels and you will use far more alcohol than petrol for the 
same power output. The ideal is to run alcohol fuels on the rich side to 
avoid problems. With methanol it's approximately twice the fuel you would 
use on straight petrol. You can't just dump these fuels into an engine 
with stock settings and expect the engine to last. 

Al
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