A> ddunbar wrote:

Hello Paul,
I can remember some discussion on fuel injectors in previous news.
There was some discussion on not using the fuel defuser in front of
the injector, what was the reason for and against the plastic
defuser.
The sealing arrangement for the fuel injectors looks a bit suspect for
leakage but I haven't heard of many cars on fire through the leakage of
fuel in fuel injected vehicles.
It would be nice if they screwed in and sealed with fuel line done the
same.

Best regards,
 ddunbar                          mailto:ddunbar@echidna.id.au

A> One of the reasons I advocate putting the fuel injector on the cool
A> side of the engine. An in-flight fire has ruined more that one
A> persons whole day.

A> The plastic diffuser are supposed to enhance the mix of air and fuel.
A> I suspect this is more of an issue at car use at low HP levels.
A> Nothing against its use.

A> Paul Lamar

Hi Paul,
If you Ont use the diffuser how where you going to seal around the
injector. The o-rings or seals seam to be very hard and would have
trouble sealing under boost pressure.
I can remember some difference between the turbo and non turbo engines
with the diffuser? does the non turbo have one o-ring to seal.
I would feel safer with the injectors set in 1000 deg C sika flex or
some other flexible sealant.
The fuel inlet side has two o-rings that seem to be of a standard type
nature.
As always's one seems to have better ideas after the learning curve and
the job is complete.

--
Best regards,
 ddunbar                            mailto:ddunbar@echidna.id.au

I assume we are talking about the two injectors in the center housing.
You can use the diffusers. No problem using them. The seal
does not have to be perfect. A slight leak will not be noticed 
due to the high volume of air flow and the relatively low pressure.
Are you using Tracy's computer or some other type of computer?
Things somewhat depend on what type of airflow sensor used
if any. Tracy's computer uses MAP and not a mass airflow sensor so it does
not care if there are any leaks in the manifold. All it cares
about is intake manifold temp, RPM and manifold pressure.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.