|April 20th, 2008
||Flight Hours: .6 ground time
||Total Hours: 5.4
Two issues have been consistent but manageable. I've always
believed in "change one thing and check results" method. However, today I
decided to change a few things at once.
- I replaced the timing belt because I realized it had been
a few years since it had been done.
- In an attempt to increase cooling capacity I closed down
the gearbox air inlet to 3/8" to decrease pressure inside cowl. I also added
two temporary scuppers in lower cowl adjacent to the exhaust outlet in a
further effort to decrease pressure inside the cowl. These openings are 3" x
3" with the lip curled about 1" outward from parallel to the lower surface
of the cowl. see
cowl design for a much better idea than what mine currently are.
- To continue to address the mis-fire I decided to resume
eliminating other issues. Since I am using a 1996 TPS on a 2001 engine I
decided to see what would happen if the TPS were mis-adjusted. The spec
calls for .5v at idle and 5v wide open. I set the TPS to .8v at idle.
After all the changes I test ran the engine for .6 hrs and
found the temps to be stable around 187deg f. and no TPS code. Yet.
SUBARU ENGINE |
AIRFRAME CHANGES |
INSTRUMENT DASH |