4rcsimmons(at)comcast.net
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 Posted: Mon Sep 01, 2014 1:27 pm Post subject: JabiruEngine-List Digest: 1 Msgs - 08/31/14 |
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I looked up the Hackman valve and didn't find what I thought was it.
Can you share a web address so I can study ?
Thanks
- Rich
| Quote: | On Sep 1, 2014, at 2:02 AM, JabiruEngine-List Digest Server <jabiruengine-list(at)matronics.com> wrote:
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JabiruEngine-List Digest Archive
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Total Messages Posted Sun 08/31/14: 1
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Today's Message Index:
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1. 03:53 AM - Re: Fuel & EGT's (Tex Mantell)
________________________________ Message 1 _____________________________________
Time: 03:53:36 AM PST US
From: "Tex Mantell" <wb2ssj(at)rochester.rr.com>
Subject: Re: Fuel & EGT's
Bob, I went through the same process and what you have is pretty close.
I installed the hackman valve ( the info is on the web) and use it for
finer adjustments. I don=99t have to change any jets from summer
to winter. I use the car gas also and get the soot but no real problem.
Tex
From: BobbyPaulk(at)comcast.net
Sent: Saturday, August 30, 2014 2:43 PM
Subject: Fuel & EGT's
Guys
Just landed after a very smooth flight to Douglas, GA. to see an XP-82
being re-built.
On the way over I burned 4.25 gallons for .9 Hrs.
turning 2750 RPM. This was at 5,000' indicating 122MPH.
On the way back 2800 RPM burned 4.5 gal at .9 hrs. 6,000' to top the
clouds and 124 MPH indicated.
EGT on #5 was 1330 while #3 was 1310 and all others were under 1250
degrees.
I think the carb needs a little tilt bottom toward 1,3,5 side.
Fuel was measured on a calibrated dipstick. So this is right at 5 GPH at
2800 RPM.
I am running a 290 needle jet. Do I need to richen it up a little or is
this about right?
I am thinking of boring the 290 needle jet another .001 and tilting the
carb bottom toward #5 side.
By the way the carb is super rich at idle and taxi. I would like to lean
it at idle if it would not affect cold starts.
The plugs and exhaust pipe are sooty burning 94 Octane Marine ( auto
fuel ).
Bobby ( age 76 )
Zodiac 601 XL "B"
Jabiru 3300 S/N 1141
Sensenich 64" x 51" Prop
Bing Carb 260 Main & 290 Needle Jet
Status - Flying 225 hrs.
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