Craig,

 

I published this also to the LML in hopes of finding speedy competitors.  Additionally, embedded responses to several of yesterdays posts are included.

 

To be precise, my quote was  “I think the lnc-2 wall is

around 225 kts.”

 

The wall of which I speak has not been leveled publicly. However, my best published speed is 224 kts; http://sportairrace.org/id80.html; My best published triangle course is a shabby 219 kts.  http://sportairrace.org/id137.html

 

To be clear Truth in airspeed collection can be generated from REA computing. I take 4 data points.  The average of the 3 computations is within ½ kt.  Your upwind / downwind legs can be a reasonable approach to truth but it depends how precise you want to be in your pursuit.

 

Consistency on the other hand is regulated by God through his choice of ambient conditions. I’ve not yet got this entirely reigned in but remain vigilant through daily prayer and supplication. Remember gents; Prov 1:7 tells us that “the fear of the Lord is the beginning of knowledge, but fools despise wisdom and discipline”.  Lest I digress…….

 

You’ve done most of the things that I would recommend.  However, I am unaware of the specific differences in cam, intake tube length/dia, etc. between the 360 and 320 and therefore expect that matching piston compression ratios is NOT all there is to catching me in the power department.  As a rule, the 320s are behind the 360s in all races by 3-5 kts.  This of course ignores a 1000 variables. Scott nearly beat me once.

 

Here are some other tweaks that might gain you a ¼ kt at a time(in no particular order or value):  We have published these items before.  They are easy to discuss but effort intensive to accomplish.

 

Balanced pressurized injector shrouds

Flap and aileron reflex

Cockpit sealing of all entry and exit air

Cooling plenum (actually it’s a duct)

Cooling exit air diverter baffle

More RPM!, but not on a Hartzell or MT prop (death or the approach toward death is not encouraged while racing).  My prop redline is 3500 rpm J

Did I say more rpm?

Schnozzle

Clean small intake air straight into a 90 deg updraft sump (works for me).

Alternator off

Did you say elect ign? (1 or 2?); There is much opportunity for passionate pursuit of leaky spark energy in this dept.

Where is your race timing?  Be very, weary careful!

Altitude; I average a TAS decrease of ABOUT 1 kt per thousand feet below 10K.  That would get you up to 208 which might beat Scott.  But then again you and Scott would have to go head to head on a day of matching ambient conditions.  One example would of course be the Airventure Cup.  Hmmmm. There’s an idea….

 

These (plus hyd pump chirps) are my demons;  hope yours are few.

Larry