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Old November 28th 06, 08:52 PM posted to rec.aviation.owning
Jim Burns[_1_]
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Posts: 329
Default JPI install details (long)

Ronnie,

I'd love to see some of your fuel flow and temperature
data logs from the JPI during cruise along with the MP
and RPM settings once you have some flight time on it.


Sure, download JPI's EZtrends software from
http://www.jpitech.com/Downloads/EzTrends_setup.exe
When we get a few flights on it I'll send you our files.


Sounds like you removed the Piper fuel flow gauges, correct?
So I guess a comparison of the Shadin fuel flow to the Piper
gauges is not possible. I'm just wondering how accurate
or not the stock fuel flow gauges are.


We don't have the Shadin yet. It's my next project. As far as our Piper
FF, it's a joke, but it's consistent, so I assume we could have it
calibrated and it would be more usefull. Our normal cruise fuel burn at
10k
feet and full throttle is 22 gph, down lower it runs 25gph. We've
confirmed
this dozens of times over hundereds of hours. The Piper gauge shows
16.5gph
per side, 33gph, or higher.


Also, how does the JPI CHTs compare to the single Piper
CHT. Both of mine have always indicated right near the
top end of the green arc, but I don't know if the gauges are
inaccurate or if the CHTs are really that high.


From what I can tell, our CHT gauges are pretty accurate. Both of our old
AC CHT probes have been replaced with the Rockwell probes plus the in-line
resistor mod that the Bonanza flyers created. We're able to keep that
overly wide Piper needle on the low side of the 400 degree dot.


I'm still flying blind in reguard to engine temps and fuel flows.
since I only have the facotry gauges. Maybe one of these days
I'll have the same dream that you did :-)

Ronnie