Rusty,
        Keep the reports coming.  How is the ducting to the oil cooler/ evaporator core?  If I am not mistaken that core has 300 cubic inches of volume versus the 180 or so in a stock Mazda cooler.  Thanks

Joe Berki
Limo EZ


At 09:49 PM 8/25/2004 -0500, you (Russell Duffy) wrote:

Greetings,
 
Attached is today's log.  I think I'm on the right track, though if I keep adding power, I'll need some more oil cooling.  Water is fine, but oil is getting up there fast. 
 
BTW, if you guys are getting tired of reading these, let me know.  I don't really wish to spam the group with this stuff if it's not of general interest. 
 
Cheers,
Rusty (finally seeing potential)
 
 
 
 

<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />8-25-04  .4 hours / 30.1 total

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Added a trim tab today on the rudder.  The business end of it is about 7 inches tall, and 1.25 inches wide.  I bent it about 30 degrees, and found out that it s way too much.  Now, instead of having the ball about half way to the right, it s about 2/3 of the way to the left.  Took out about half the bend after the flight. 

 

Again, the takeoff was no problem.  Once you get the tail up at low power, it s easy to balance rudder with additional throttle.  I may actually end up leaving the mount like it is for the foreseeable future. 

 

After yesterday s tests, I decided to try flying the plane with the TB open to the inside of the cowling.  I did leave the old inlet tubes pointing in the general direction of the TB, to at least give it some cooler air.  There is certainly no ram air pressure though. 

 

During the takeoff, I got a real sense of increased power.  Climb out at 130 mph was 6000 rpm, up from 5800 with the inlets connected, but still down from the 6200 that Tracy reported.  MAP was only 26.5.

 

I could only play at 1400 ft today, and ran a couple flat out bursts of about 30 seconds each.  TAS only showed 190, which I m going to have to test because I think it must be wrong.   Map was 26 inches, and rpm was 6500.  This is 300 rpm more than when I had the inlet connected, but probably lower MAP. 

 

I think what I need now is an improved ram air inlet, that continues to use the current air horns.  I feel like this will be the key to getting the performance I hoped for, but unfortunately, I don t know if I ll be able to do it without making a completely new scoop for just the TB.  Naturally, the most convenient place for that new scoop is on top of the cowl, similar to what Tracy did before.  I m trying to resist, but I think it s almost inevitable at this point.  I just don t have space to route a large enough duct around the engine. 

 

Finally, I m happy to report a significant reduction in my personal aft temperature with the new tailpipe.  It was noticeably quieter as well.  Most importantly, I didn t smell exhaust once!!!