nrp wrote:
: Another straw to grasp - Might it be an anomaly in your intake manifold
: that is changing the fuel distribution as the oil warms up? Something
: like a gasket protrusion ever so slightly affecting liquid-vapor fuel
: flow along the manifold walls (like the gasket between the carb & the
: oil sump). A possible confirming symptom would be if the problem is
: sensitive to fuel source & possibly if the power output "switchover" is
: abrupt (then it would be someting else) or gradual over several
: minutes.

Interesting theory, but I have a hard time believing that the oil warms up
appreciably in 60 seconds. I've had the power come back abruptly, and gradually. The
gradual one is the worst because the problem is already so subtle and intermittent so
it's tough to know it happened if it comes back slowly. The time it was "abrupt" it
was quite noticable.... similar to a second mag coming online (although I'd done a mag
drop during that particular problem takeoff, so it wasn't that).

: The lifter pump-up on disassembly is certainly normal as you probably
: now know.

Erg. There's gotta be a better way than having three people (one compressing
valve springs, one pushing the rod, and the other wiggling the rocker arm) futzing
with it. Given that we were going to really *do* anything to the lifters even if we
removed them, I didn't figure it was worth taking the tubes out and having to get new
seals.

-Cory

--

************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
************************************************** ***********************