[AT] GM Flex Fuel vehicles

[Cecil Bearden]

We had some CNG fueled trucks about 12 years ago.  They were Chevrolets and 
they used the Medium Duty truck engine so that it had stellite valves and 
seats.  However, since that engine was a lower compression ratio, it got 
only about 8 mpg...    This was a program by the OK sec of environment.  I 
pointed it out to them that we needed about 10 or 12 to 1 compression ration 
to get the full value of the anti-knock qualities of the CNG.....

It fell on deaf ears, they thought I was a fugitive from Roswell, and the 
trucks were sold to one of the Governors friends and converted to 
gasoline....

It was doomed to fail from the start.  The engineers worry about stellite 
valves and seats, and I ran propane in my trucks for years on just the old 
non-modified passenger car engines.  Never had any trouble...

Cecil in OKla


----- Original Message ----- 
From: <DAVIESW739 at aol.com>
To: <at at lists.antique-tractor.com>
Sent: Sunday, August 13, 2006 12:58 PM
Subject: Re: [AT] GM Flex Fuel vehicles


>
> When we rebuilt 25 Chevy Love pickups back in  the early 80's to run on E 
> 85
> we had to take the carbs off have then  nickel plated then bored out all 
> the
> jet to almost twice the size. change the  fuel tank from 10 Gallons to 40 
> and
> put in a different fuel pump that could take  the corrosive action of the
> fuel.
> Its not a simple change over and these  engines ran terrible on the stuff. 
> 5
> to 6 MPG because of the lower compression  ratios.
> I understand that the newer mods will get better fuel mileage but if  you
> have to run 15 percent gasoline then what are you saving. The Feds require 
> the
> 15 percent gasoline for safety purposes.
>
> Walt  Davies
> Cooper Hollow Farm
> Monmouth, OR 97361
> 503 623-0460
>
> _______________________________________________
> AT mailing list
> Remembering Our Friend Cecil Monson 11-4-2005
> http://www.antique-tractor.com/mailman/listinfo/at