Today's Message Index:
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1. 01:13 AM - Orange Fox photo album (James, Clive R)
2. 01:37 AM - Re: Orange Fox photo album (James, Clive R)
3. 11:03 AM - Re: Re: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) (Lynn Matteson)
4. 12:03 PM - Re: Re: [jabiruengines] Speaking of TBO (was12-Point Crowsfoot Adapter) (Don Honabach)
Message 1
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| Subject: | Orange Fox photo album |
http://groups.yahoo.com/group/jabiruengines/photos/album/1689294132/pic/
list
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Don
Honabach
Sent: 04 August 2011 00:08
Subject: RE: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO
(was12-Point Crowsfoot Adapter)
--> <don.honabach@pcperfect.com>
Lynn,
Sorry, one more question. Do you have a picture of the 'ramcharger'
intake manifold?
Thanks!
Don
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Lynn
Matteson
Sent: Wednesday, August 03, 2011 3:42 PM
Subject: Re: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO
(was12-Point Crowsfoot Adapter)
--> <lynnmatt@jps.net>
Don-
I didn't start out wanting to make mods to the engine, but the rocker
arm bushings wore out, so I replaced them with something that I thought
was a better bearing for the purpose. When the crank gear broke, that
opened the door for the ignition modification. I hadn't liked the
pseudo-magneto that Jabiru came up with, and when I had oil leaks from
both distributor shafts early on, and rotors that got wobbly (my fault
for not gluing them on....what? how many engines require you to glue a
rotor in place?), that set the stage for changing to a modern ignition
system....capable of advancing the timing when necessary.
I bought the Rotec TBI because I had been reading a lot about flying
"lean of peak EGT", and I wanted to give that theory a try. Because you
can't do this with a Bing....that is, change the mixture on the
fly...when I heard about the TBI that Rotec was building, I bought one.
If you are using it on a 2200, plan on restricting the throttle travel,
as the size of the throat...40 mm, if that's the one you bought...is to
much for the 2200 engine. For a 3300, I understand that the size is just
right. I restricted mine about 1/4", then later I thought that sleeving
the throat down to 35 or 36 mm made more sense. (I see that Rotec is now
making a 34 mm TBI for VW engines.) Also, once you begin to fly it, you
will probably notice that the mixture control can be adjusted to provide
a lesser-than-full travel...also necessary for the smaller engine.
I think that the latest intake manifold that I built improves the power
of the engine, and gets the EGT's a bit closer....but still not perfect
as I had hoped. But like they say, if the CHT's are close and low, (and
mine are always less than 20 F apart, and often down to single digits)
then the EGT spread is not that big a deal.
As long as your engine is running well, and you follow the hourly checks
that Jab provides, and have *good luck*, none of those mods that I did
was vital. I just saw room for improvement and I love to tinker, so I
did what I felt had to be done.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062
Prince prop 64 x 30, P-tip
Electroair direct-fire ignition system
Rotec TBI-40 injection (sleeved to 36mm)
Status: flying with "Ramcharger" intake manifold...1152 hrs (since
3-27-2006)
do not archive
On Aug 3, 2011, at 12:59 PM, Don Honabach wrote:
> <don.honabach@pcperfect.com>
>
> Lynn,
>
> I just noticed that you've done a ton of mods -- very cool! I think
> there should be a new model "Lynn's Jabiru Extreme Edition"
> for your setup <g>!
>
> One of the things I noticed was that you have the Rotec TBI for your
> engine. I just ordered mine the other day. If you don't mind, any
> tips for a newb?
>
> Also, what was the main reason for going over to the Alectroair
> Ignition System?
>
> Looking back, if you had to do all the mods over again for the Jabiru
> Engine (intake manifold, ignition, carb, etc.), would you?
> Are there any that you consider vital?
>
> Thanks,
> Don
>
Message 2
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| Subject: | Orange Fox photo album |
http://groups.yahoo.com/group/jabiruengines/photos/album/1689294132/pic/
list
If it breaks up post the whole thing including 'list'
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Don
Honabach
Sent: 04 August 2011 00:08
Subject: RE: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO
(was12-Point Crowsfoot Adapter)
--> <don.honabach@pcperfect.com>
Lynn,
Sorry, one more question. Do you have a picture of the 'ramcharger'
intake manifold?
Thanks!
Don
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Lynn
Matteson
Sent: Wednesday, August 03, 2011 3:42 PM
Subject: Re: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO
(was12-Point Crowsfoot Adapter)
--> <lynnmatt@jps.net>
Don-
I didn't start out wanting to make mods to the engine, but the rocker
arm bushings wore out, so I replaced them with something that I thought
was a better bearing for the purpose. When the crank gear broke, that
opened the door for the ignition modification. I hadn't liked the
pseudo-magneto that Jabiru came up with, and when I had oil leaks from
both distributor shafts early on, and rotors that got wobbly (my fault
for not gluing them on....what? how many engines require you to glue a
rotor in place?), that set the stage for changing to a modern ignition
system....capable of advancing the timing when necessary.
I bought the Rotec TBI because I had been reading a lot about flying
"lean of peak EGT", and I wanted to give that theory a try. Because you
can't do this with a Bing....that is, change the mixture on the
fly...when I heard about the TBI that Rotec was building, I bought one.
If you are using it on a 2200, plan on restricting the throttle travel,
as the size of the throat...40 mm, if that's the one you bought...is to
much for the 2200 engine. For a 3300, I understand that the size is just
right. I restricted mine about 1/4", then later I thought that sleeving
the throat down to 35 or 36 mm made more sense. (I see that Rotec is now
making a 34 mm TBI for VW engines.) Also, once you begin to fly it, you
will probably notice that the mixture control can be adjusted to provide
a lesser-than-full travel...also necessary for the smaller engine.
I think that the latest intake manifold that I built improves the power
of the engine, and gets the EGT's a bit closer....but still not perfect
as I had hoped. But like they say, if the CHT's are close and low, (and
mine are always less than 20 F apart, and often down to single digits)
then the EGT spread is not that big a deal.
As long as your engine is running well, and you follow the hourly checks
that Jab provides, and have *good luck*, none of those mods that I did
was vital. I just saw room for improvement and I love to tinker, so I
did what I felt had to be done.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062
Prince prop 64 x 30, P-tip
Electroair direct-fire ignition system
Rotec TBI-40 injection (sleeved to 36mm)
Status: flying with "Ramcharger" intake manifold...1152 hrs (since
3-27-2006)
do not archive
On Aug 3, 2011, at 12:59 PM, Don Honabach wrote:
> <don.honabach@pcperfect.com>
>
> Lynn,
>
> I just noticed that you've done a ton of mods -- very cool! I think
> there should be a new model "Lynn's Jabiru Extreme Edition"
> for your setup <g>!
>
> One of the things I noticed was that you have the Rotec TBI for your
> engine. I just ordered mine the other day. If you don't mind, any
> tips for a newb?
>
> Also, what was the main reason for going over to the Alectroair
> Ignition System?
>
> Looking back, if you had to do all the mods over again for the Jabiru
> Engine (intake manifold, ignition, carb, etc.), would you?
> Are there any that you consider vital?
>
> Thanks,
> Don
>
Message 3
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| Subject: | Re: RE: [jabiruengines] Speaking of TBO (was12-Point |
Crowsfoot Adapter)
Thanks, Don.
I can't really say for sure as to fuel economy, as I didn't have
absolute records of a before, and after the rebuild, comparison to
make any definitive statement. I can only say it *seems* like fuel
lasted longer after I installed the Electroair, but that is pure
guesswork on my part. When I really noticed the fuel savings was when
I installed the TBI...that's when I started to pay closer attention
to fuel numbers and kept better records. But with the kind of flying
I do, flight comparisons between today and yesterday and tomorrow are
going to be pretty scattered, given wind direction, strength, etc.
To answer the photos question, here are a few to view in case you
can't get into the Yahoo album area:
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062
Prince prop 64 x 30, P-tip
Electroair direct-fire ignition system
Rotec TBI-40 injection (sleeved to 36mm)
Status: flying with "Ramcharger" intake manifold...1152 hrs (since
3-27-2006)
On Aug 3, 2011, at 7:06 PM, Don Honabach wrote:
> <don.honabach@pcperfect.com>
>
> Thanks Lynn!
>
> Great, great, great info...
>
> Did you happen notice any better fuel economy with the new ignition
> system? I thought I saw on their site a claim of 10 to 15% better
> fuel economy which has raised my interest a bit in the unit.
>
> For what it's worth, while I appreciate the automatic nature of the
> Bing Carb, I'm really looking forward to the finer control on the
> Rotec TBI.
>
> Thanks!
> Don
Message 4
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| Subject: | RE: [jabiruengines] Speaking of TBO (was12-Point |
Crowsfoot Adapter)
THANKS Lynn!
Don
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Lynn Matteson
Sent: Thursday, August 04, 2011 10:50 AM
Subject: Re: JabiruEngine-List: RE: [jabiruengines] Speaking of TBO (was12-Point
Crowsfoot Adapter)
Thanks, Don.
I can't really say for sure as to fuel economy, as I didn't have absolute records
of a before, and after the rebuild, comparison to make any definitive statement.
I can only say it *seems* like fuel lasted longer after I installed the
Electroair, but that is pure guesswork on my part. When I really noticed the fuel
savings was when I installed the TBI...that's when I started to pay closer
attention to fuel numbers and kept better records. But with the kind of flying
I do, flight comparisons between today and yesterday and tomorrow are going
to be pretty scattered, given wind direction, strength, etc.
To answer the photos question, here are a few to view in case you can't get into
the Yahoo album area:
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