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Message
Greetings,
Well, my week of fiberglass
hell seems to have paid off. As you may recall, I got 5500 rpm with my old
inlet ducting, 5700 with the ducting removed, 5820 with the ducting removed, and
short air horns on the TB. Today, with all the new inlet installed, I got
6000 static. I'm pretty happy about this. Tracy reported 6200
at 120-130mph in climb, and I'm sure I can top that now.
I only saw 27 MAP at full
throttle static though, but I can't say I ever tried this when I thought all was
well (and was NA). Has anyone tied their plane down, and run full throttle
to see what the MAP actually reads? 27 still sounds low, but I just don't
think it can be improved in the current configuration, and may just be a
reporting error from the way the ports are mounted in the TB.
The downside to
all this success is cooling. I used
to be able to run on the ground for minutes at full throttle without
overheating. Not anymore. I exceed 200 in seconds at full
throttle, and I saw a max of about 220 degrees for both water and oil during my
brief-as-possible runs today. The
water might be OK on climb with some airflow, but the oil is going to overheat
quickly. It doesn’t make sense to
have more power, and not be able to use it, so I’m sure my next big project is
to improve the oil cooling.
Fortunately, after next
weekend, I'll have a SlingShot to fly, while I fiddle with the RV-3 for the rest
of my life :-)
Cheers,
Rusty (one solution,
leads to a new problem)
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