Here's a link to a fairly long thread:

http://canardaviationforum.dmt.net/showthread.php?t=2058&page=5&pp=15
<http://canardaviationforum.dmt.net/showthread.php?t=2058&page=5&pp=15>


I have no idea what is going on Matt. According to Francois
the unburned hydrocarbons are burning in the exhaust
manifold and or the turbo. Perhaps the RX8 engine might
be a better choice as it supposedly recycles unburned fuel
with a cooler exhaust. Francois is doing some  turbine blade
temperature test by painting the turbine blades with special
paint.

To really know what is going on the intake air temp should
be monitored and the engine leaned over a wide range measuring
the mixture ratio with a wide band mixture monitor to see
what effect this has on TIT. In other words get data on
TIT verses mixture ratio. Could be when leaned properly
with a a cool intake charge to discourage detonation  or
even anti detonation fluid injected  the  data
will show the TIT coming down with a leaned mixture.

On the other hand 1800 F may be no problem for an Inconel
turbine at modest RPMs. Does John have an Inconel turbine?
One needs to know the RPM of the turbine as that has a serious
affect on the life of a turbine blade due to centrifugal force.

Paul Lamar ...No rotor no motor.

Hi Matt, where's your EGT probe mounted?

B

Brian, according to John's post about this turbo, about which Matt was
questioning, John's EGT probe is mounted in the exhaust pipe 2 inches after
the turbine.

Barry Gardner
Wheaton, IL

1700*F at 2-3" past the turbine housing is far, far too hot.  Just to give
you guys
an idea of what I do, I shoot for mid 1400's and nothing higher on very
heavy
loads that go into the several hundreds of horsepower range.  My next
question:

What kind of manifold pressure are you running on take-off John?  At that
manifold pressure, what's the amount of advance you're cranking out of the
computer for the leading plugs and then the trail-split timing advance?

Also, do you guys monitor air/fuel ratios using a 5V wideband lambda sensor
setup?

B
___________________________________________________________________________
Brian D. Cain -/- Dallas/Ft. Worth, TX -/- bdc@bdcmotorsports.com
BDC Motorsports | Performance Rotary Engines, Specialized Porting, EFI
System Installation & Tuning
MSN bdc196@hotmail.com, Yahoo! bdc196, AOL Symajhi, ICQ# 1733105
http://www.bdcmotorsports.com -/- http://bdc.cyberosity.com

You will have to go on the Cozy list Brian. John is not on here
as I made him fix his motor mount and he got up set over
that :)

Paul Lamar

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