Any body running an engine notice that or is it just
my RV4? Also the mixture is rapidly varying which of course
could be caused by the rapidly changing fuel
pressure. My pressure regulator is referenced to intake
manifold pressure. Is everybody doing that?

It is so bad I can't believe the engine runs.
Now that I have learned to steer the RV I can focus
on what is going on with the engine :)

Paul Lamar


Paul,
First try pulling the manifold pressure hose from the regulator (then
plug the hose of course)
and run the engine (monitor the fuel pressure in cockpit for
result)..........


Kelly Troyer
*"DYKE DELTA JD2" (Eventually)*
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50 Turbo

If I pull the hose the tuning will be way off. The engine may
not start run. Worth a try however. I'll just clamp it off
with a large paper clip.

Paul Lamar

Hi   Paul,
                 try putting a very small restrictor in the line to the
manifold, to reduce the pulsations.
    John Burey


Errrr, maybe not.  Don't damp the measurement of the pulsations until
you are CERTAIN why they are there!  A damper only masks the data
.... like putting a bandaid over a bullet hole!  If it is some
resonant interaction between pumps or something there might be real
trouble down the line.

SD

Paul,
Putting a automotive fuel filter in the vacuum line can sometimes smooth out
the pressure pulsations, then the fuel pressure should be more consistent.
Worth a try on the ground.



Bill Schertz
KIS Cruiser #4045
N343BS
Phase one testing Completed


I am dying of cursorily. How fast have you gone in the Cruiser?

Paul Lamar