Piper Forum > Piper Models > Cherokee > Hot #2 cylinder PA32-300
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Old 07-11-2017, 07:45 PM   #11
crgreener
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Gold. Thanks


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Old 07-12-2017, 02:00 PM   #12
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Quote:
Originally Posted by Orest @ CYFD View Post
There it is!

* Orest
Do you know if this is still a problem on the 99 II TC? (is the bracket bendable to increase airflow and temperature?)


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Old 07-12-2017, 03:56 PM   #13
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Not off hand, but I suspect it is fixed.

The change in the design with PA28s was to add a vent tube that blows air directly onto the front face of Cyl #2, kind of like the Mags in the back. There may have been other changes made in the PA32s.

IAC, if your Cyl #2 is not 50F warmer than the rest, you don't need to worry about it.

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Old 07-16-2017, 05:01 AM   #14
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You guys are awesome! Thanks for sending this my way! On a separate note (and maybe this belongs in a separate thread, but...) What value ROP/LOP do you all run your Cherokee Six's? No GAMI injectors here, and I've been running it anywhere between 50-100 ROP. My spread is around 20F. I've read in some places that 50 ROP is actually harder on the engine than Peak (Wish I remembered where I read that)
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Old 07-16-2017, 07:27 AM   #15
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Google John Deakins Pelican Perch Where should I run my engine. You'll find all that info.
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Old 07-16-2017, 03:17 PM   #16
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Originally Posted by snizbatch View Post
...What value ROP/LOP do you all run your Cherokee Six's? No GAMI injectors here, and I've been running it anywhere between 50-100 ROP.
Run 100F ROP, or richer; OR run at Peak or leaner.

Yes, 50F ROP, all other things being equal, is where you have the highest intracylinder temps/pressure, and have the lowest detonation margin for that power setting.

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Old 07-16-2017, 04:29 PM   #17
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I usually run at peak or 10-50 lop, but try to get as much power as I can by managing cylinder temp more than egt.
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Old 07-17-2017, 03:24 PM   #18
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As regards the #2 cylinder baffling adjustment. I replaced the engine and baffling in 2012. The new baffling has a cutout to accomplish the same increased airflow as the previously posted adjustment. There is a similar cutoff for the #1 cylinder as well.

You can see the cutout in this photo:
https://www.dropbox.com/s/2pg08b95mu...affle.jpg?dl=1
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Old 07-17-2017, 07:48 PM   #19
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Yep, that fixes it.

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Old 07-19-2017, 01:35 PM   #20
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Default plug replaced

I had #2 running much hotter than the rest on a recent flight and noticed on the return flight one of the mags rough on runup check.

Mentioned to my mech, he found a plug on #2 resistance low.

Replaced the plug.

Now they it is not hotter, and smooth mag check.

Though I'll say, I will now scrutinize the temps to see if #2 normally runs hotter for me.


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