I'll send cash, I don't have any gold just lying around.
 Thanks,
 Brian Trubee

 I keep mine in the freezer :)

 Paul Lamar


Paul,

So Robin has frozen your assets.   Again:)

Say on the pressure taps I wonder what is really happening to the pulse the sensor sees.  The brass fittings inside the oil injector location has a very tiny hole and as far as I can tell no check valve ball.  I haven't run a wire through it so I don't know for sure.   Assuming the absence of a check valve when  rotor 1 and 2 is tied together gas would flowing between them.  Albeit a very nominal bit.  More important would be the pressure wave and perhaps??? this acts more like an expansion chamber averaging  the sample out.   I don't understand how you got separate readings from the taps at the same time they were supposedly tied together though. The curves are quite different.


I agree it would be best if everyone used this location to sample MAP.   It may not result in the actual MAP in that location but like EGT trends and consistent readings are more important to look at then the average number.

MAF may be the more accurate way to measure actual airflow if the sensor can be provided with a clean airflow immediately before and after.  Same with water flow sensors.    Turbulence not only skews the data but makes it inconsistently skewed.

Doug  in Japan


They do have check valves. In essences they wait until there is a vacuum
in the chamber before drawing in apex seal lubrication oil
from the metering device. I hesitate to call it a pump
as no real pressure is provided.

I am sorry I did not make that illustration clear. I think you were in Nepal
when all that happened. What we did is measure the individual runner
pressure with taps in each tube close to the engine. On the down stream
side of the slide throttle.

Then we measured the pressure at the apex seal oil holes.

For final tunning we teed the two apex seal taps together
for Tracy's identical pressure sensor. The EFI system settled
right down and ran well.

For more info on this read:
http://www.rotaryeng.net/fund-of-intake.html

Paul Lamar