Today's Message Index:
----------------------
1. 05:52 AM - Re: Jetting Stratus Bing Carbureters (Weston, Jim)
2. 09:59 PM - exhaust heat (gary)
3. 09:59 PM - Re: Jetting Stratus Bing Carbureters (gary)
Message 1
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| Subject: | Jetting Stratus Bing Carbureters |
--> Stratus-List message posted by: "Weston, Jim" <Jim.Weston@delta.com>
Thanks Don,
I'm assuming that you're thinking that the heat muff shields the back of
the oil pan from the muffler? I don't need the heat muff, but I have
thought about installing some sort of heat shield between the muffler
and the back of the oil pan. I may actually be getting false high
readings from the oil temp due to the radiated heat from the muffler.
That oil temp sensor is right on the back side of the oil pan. I've
also thought about drilling thru that nut that the sensor screws into on
the back of the pan, so that the sensor is actually bathed in the oil.
But I worry about causing a leak.
Thanks Again,
Jim
-----Original Message-----
From: owner-stratus-list-server@matronics.com
[mailto:owner-stratus-list-server@matronics.com] On Behalf Of Don Walker
Subject: Re: Stratus-List: Jetting Stratus Bing Carbureters
--> Stratus-List message posted by: "Don Walker" <d3dw@msn.com>
Hi Jim,
The main jet seems to be good at 165 on mine...a change from the 162.
It ran rough last week with the midrange on the bottom notch. Last
weekend I moved that up to the third, just like yours and that is
working well. I also took a lot of time balancing the carbs.
To summarize, mine ran very smoothly with the 162 but I knew it was
at least slightly lean in the mid and high ranges...particularly in
cooler weather. Now I am pleased to say the engine is running
better...smoother than ever throughout the throttle range and seems to
have better power. The roughness at the 2800 rpm setting was reduced to
negligible. I am beginning to think much of any roughness in the
midrange was due to a little carb imbalance. It has always been smooth
above 3800 until backing off the power. Now it is much smoother in
backing off the power throughout the range.
Regarding oil temps...I hear many running oil temps higher. Just a
note...with a heat muff and an adjustable door in front of my oil pan,
my oil temps never exceed 190 even in the hot summer, though the head
will get up to 215 in a climb. don
Message 2
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--> Stratus-List message posted by: "gary" <FlyinK@Efortress.com>
Don,
I went thru many many revisions of my cooling system, and when I was
trying to get it to work with the stock exhaust I played with a heat shield
and trying to get better airflow over the pan and muffler. The heat shield
helped a little but I got tired of making minor changes to a system that was
marginal. I know you're not interested in a major redesign, but it was like
night and day when I finally made the big change. I'll try to dig out some
notes, but I was thinking the same as you - possibly radiated
heat onto the sensor, and I was disappointed at the results. I think it's
radiated heat onto the whole oil pan, not just the sensor. So I think it's
a valid oil temp reading. Easy enough to try the heat shield but if it's
marginal, it'll only make it less marginal. It was very obvious when I
moved the exhaust that things were right, very glad I did it. Next is ram
air and exhaust augmented cooling, and hopefully a Quinti/Sensenich prop.
Gary Krysztopik
Pelican PL - N522GK
Stratus Subaru EA-81
Newport, RI
http://members.efortress.com/flyink/index.html
----- Original Message -----
From: "Weston, Jim" <Jim.Weston@delta.com>
Subject: RE: Stratus-List: Jetting Stratus Bing Carbureters
> --> Stratus-List message posted by: "Weston, Jim" <Jim.Weston@delta.com>
>
> Thanks Don,
>
> I'm assuming that you're thinking that the heat muff shields the back of
> the oil pan from the muffler? I don't need the heat muff, but I have
> thought about installing some sort of heat shield between the muffler
> and the back of the oil pan. I may actually be getting false high
> readings from the oil temp due to the radiated heat from the muffler.
> That oil temp sensor is right on the back side of the oil pan. I've
> also thought about drilling thru that nut that the sensor screws into on
> the back of the pan, so that the sensor is actually bathed in the oil.
> But I worry about causing a leak.
>
> Thanks Again,
> Jim
>
>
> -----Original Message-----
> From: owner-stratus-list-server@matronics.com
> [mailto:owner-stratus-list-server@matronics.com] On Behalf Of Don Walker
> To: stratus-list@matronics.com
> Subject: Re: Stratus-List: Jetting Stratus Bing Carbureters
>
> --> Stratus-List message posted by: "Don Walker" <d3dw@msn.com>
>
> Hi Jim,
> The main jet seems to be good at 165 on mine...a change from the 162.
> It ran rough last week with the midrange on the bottom notch. Last
> weekend I moved that up to the third, just like yours and that is
> working well. I also took a lot of time balancing the carbs.
> To summarize, mine ran very smoothly with the 162 but I knew it was
> at least slightly lean in the mid and high ranges...particularly in
> cooler weather. Now I am pleased to say the engine is running
> better...smoother than ever throughout the throttle range and seems to
> have better power. The roughness at the 2800 rpm setting was reduced to
> negligible. I am beginning to think much of any roughness in the
> midrange was due to a little carb imbalance. It has always been smooth
> above 3800 until backing off the power. Now it is much smoother in
> backing off the power throughout the range.
> Regarding oil temps...I hear many running oil temps higher. Just a
> note...with a heat muff and an adjustable door in front of my oil pan,
> my oil temps never exceed 190 even in the hot summer, though the head
> will get up to 215 in a climb. don
>
>
>
Message 3
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| Subject: | Re: Jetting Stratus Bing Carbureters |
--> Stratus-List message posted by: "gary" <FlyinK@Efortress.com>
Jim,
I went thru many many revisions of my cooling system, and when I was
trying to get it to work with the stock exhaust I played with a heat shield
and trying to get better airflow over the pan and muffler. The heat shield
helped a little but I got tired of making minor changes to a system that was
marginal. I know you're not interested in a major redesign, but it was like
night and day when I finally made the big change. I'll try to dig out some
notes, but I was thinking the same as you - possibly radiated
heat onto the sensor, and I was disappointed at the results. I think it's
radiated heat onto the whole oil pan, not just the sensor. So I think it's
a valid oil temp reading. Easy enough to try the heat shield but if it's
marginal, it'll only make it less marginal. It was very obvious when I
moved the exhaust that things were right, very glad I did it. Next is ram
air and exhaust augmented cooling, and hopefully a Quinti/Sensenich prop.
Gary Krysztopik
Pelican PL - N522GK
Stratus Subaru EA-81
Newport, RI
http://members.efortress.com/flyink/index.html
----- Original Message -----
From: "Weston, Jim" <Jim.Weston@delta.com>
Subject: RE: Stratus-List: Jetting Stratus Bing Carbureters
> --> Stratus-List message posted by: "Weston, Jim" <Jim.Weston@delta.com>
>
> Thanks Don,
>
> I'm assuming that you're thinking that the heat muff shields the back of
> the oil pan from the muffler? I don't need the heat muff, but I have
> thought about installing some sort of heat shield between the muffler
> and the back of the oil pan. I may actually be getting false high
> readings from the oil temp due to the radiated heat from the muffler.
> That oil temp sensor is right on the back side of the oil pan. I've
> also thought about drilling thru that nut that the sensor screws into on
> the back of the pan, so that the sensor is actually bathed in the oil.
> But I worry about causing a leak.
>
> Thanks Again,
> Jim
>
>
> -----Original Message-----
> From: owner-stratus-list-server@matronics.com
> [mailto:owner-stratus-list-server@matronics.com] On Behalf Of Don Walker
> To: stratus-list@matronics.com
> Subject: Re: Stratus-List: Jetting Stratus Bing Carbureters
>
> --> Stratus-List message posted by: "Don Walker" <d3dw@msn.com>
>
> Hi Jim,
> The main jet seems to be good at 165 on mine...a change from the 162.
> It ran rough last week with the midrange on the bottom notch. Last
> weekend I moved that up to the third, just like yours and that is
> working well. I also took a lot of time balancing the carbs.
> To summarize, mine ran very smoothly with the 162 but I knew it was
> at least slightly lean in the mid and high ranges...particularly in
> cooler weather. Now I am pleased to say the engine is running
> better...smoother than ever throughout the throttle range and seems to
> have better power. The roughness at the 2800 rpm setting was reduced to
> negligible. I am beginning to think much of any roughness in the
> midrange was due to a little carb imbalance. It has always been smooth
> above 3800 until backing off the power. Now it is much smoother in
> backing off the power throughout the range.
> Regarding oil temps...I hear many running oil temps higher. Just a
> note...with a heat muff and an adjustable door in front of my oil pan,
> my oil temps never exceed 190 even in the hot summer, though the head
> will get up to 215 in a climb. don
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