I was thinking about doing some evaporative test on avgas verses
different brands of auto fuel. I notice a distinct difference in the

intake

manifold cleanliness  between the runners with the fuel injectors

upstream

and the

fuel injectors in the center housing. With the injectors upstream
the intake runners feeding the outer ports are far more dirty and

lacquered up.

What is that stuff in auto fuel that causes that mess?

Paul Lamar

Paul,

Tracy Crook wrote:

Bill was correct about the composition of auto gas but I think a lot of the
gunk you saw was due to the EGR systems on the stock 13B.  I have none of
the EGR stuff and had NO such deposits after 856 hours on mostly auto fuel.

Tracy Crook
rws@altavista.net
www.rotaryaviation.com

What a relief to know that :-)

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org