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clouddog22(at)gmail.com
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 Posted: Thu May 15, 2014 5:30 pm Post subject: JPI Fuel flow gage install |
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Has anyone installed the JPI Fuel Flow Gage on a CJ6? I would think it would go between the fuel pump and carburetor but that gets a littler crazy trying to go from the CJ fittings to the standard pipe thread on the JPI. Another thought is to come from the fuel filter as I was told that unit uses the pipe thread. Any thoughts, pictures, parts lists or someone who has installed this system that could provide some insight. Thanks [quote][b]
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dsavarese0812(at)bellsout
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| Posted: Fri May 16, 2014 6:32 am Post subject: JPI Fuel flow gage install |
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Greg,
The best place to install the JPI is between the fuel pump and the carburetor fuel inlet. I have seen them installed before the fuel pump on the CJ, between the fuel filter and the fuel pump. The reason folks install it there is because it is easier to install it there than on the output side of the fuel pump.
There is a way to fit the JPI transducer into the line between the output of the fuel pump and the carburetor by fabricating two hose sections. You can make up the hoses using the appropriate size Aeroquip 303 hose (as close as possible to the size of the metric hose) and AN491-x fittings. All available from Aircraft Spruce. The "x" is the same size as the hose size. For example, if you are using 303-6 hose, then you need an AN491-6 fitting. The B-nut on the 491-x fitting is loose in the fitting kit. You can discard it and replace it with the metric nut which you must remove from the old hose. Fabricate the ends that must re-connect to the fuel pump and the carburetor inlet on each hose section. Remember, you are going to connect the fuel transducer in between the two hose sections you are fabricating.
Next, using standard AN491-x fittings on the ends of the hose that must connect to the JPI, fit the two standard AN491-x fittings (you're going to use the AN B-nuts) to the two sections of hoses which have the metric B-nuts on the other ends. On the JPI transducer, which I believe requires 1/4" NPT male fittings, find the appropriate size AN flare (match the flare size to the standard AN491-x fitting on the hose ) to 1/4" NPT fitting.
I believe the installation instructions for the transducer says it should be installed as close to horizontal (parallel to the ground) as possible. So build the hoses to accommodate the installation requirement which means the two sections of hose that you will fabricate will be much longer than the one piece hose you remove from the fuel pump to the carburetor.
Hope this helps.
Dennis
| Quote: | A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1 |
On 5/15/2014 8:29 PM, Greg Wrobel wrote:
[quote]
Has anyone installed the JPI Fuel Flow Gage on a CJ6? I would think it would go between the fuel pump and carburetor but that gets a littler crazy trying to go from the CJ fittings to the standard pipe thread on the JPI. Another thought is to come from the fuel filter as I was told that unit uses the pipe thread. Any thoughts, pictures, parts lists or someone who has installed this system that could provide some insight. Thanks [b]
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dabear
Joined: 21 Jan 2011
Posts: 92
Location: Warrenton, VA
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| Posted: Fri May 16, 2014 8:26 am Post subject: JPI Fuel flow gage install |
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Also best (besides level) is that there are a couple of inches of straight hose/tube before and after the transducer so that you are getting consistent flow (no strange flow from corners).
Bear
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of A. Dennis Savarese
Sent: Friday, May 16, 2014 10:31 AM
To: yak-list(at)matronics.com
Subject: Re: JPI Fuel flow gage install
Greg,
The best place to install the JPI is between the fuel pump and the carburetor fuel inlet. I have seen them installed before the fuel pump on the CJ, between the fuel filter and the fuel pump. The reason folks install it there is because it is easier to install it there than on the output side of the fuel pump.
There is a way to fit the JPI transducer into the line between the output of the fuel pump and the carburetor by fabricating two hose sections. You can make up the hoses using the appropriate size Aeroquip 303 hose (as close as possible to the size of the metric hose) and AN491-x fittings. All available from Aircraft Spruce. The "x" is the same size as the hose size. For example, if you are using 303-6 hose, then you need an AN491-6 fitting. The B-nut on the 491-x fitting is loose in the fitting kit. You can discard it and replace it with the metric nut which you must remove from the old hose. Fabricate the ends that must re-connect to the fuel pump and the carburetor inlet on each hose section. Remember, you are going to connect the fuel transducer in between the two hose sections you are fabricating.
Next, using standard AN491-x fittings on the ends of the hose that must connect to the JPI, fit the two standard AN491-x fittings (you're going to use the AN B-nuts) to the two sections of hoses which have the metric B-nuts on the other ends. On the JPI transducer, which I believe requires 1/4" NPT male fittings, find the appropriate size AN flare (match the flare size to the standard AN491-x fitting on the hose ) to 1/4" NPT fitting.
I believe the installation instructions for the transducer says it should be installed as close to horizontal (parallel to the ground) as possible. So build the hoses to accommodate the installation requirement which means the two sections of hose that you will fabricate will be much longer than the one piece hose you remove from the fuel pump to the carburetor.
Hope this helps.
Dennis
| Quote: | | A. Dennis Savarese334-285-6263334-546-8182 (mobile)www.yak-52.comSkype - Yakguy1 |
On 5/15/2014 8:29 PM, Greg Wrobel wrote:
| Quote: |
Has anyone installed the JPI Fuel Flow Gage on a CJ6? I would think it would go between the fuel pump and carburetor but that gets a littler crazy trying to go from the CJ fittings to the standard pipe thread on the JPI. Another thought is to come from the fuel filter as I was told that unit uses the pipe thread. Any thoughts, pictures, parts lists or someone who has installed this system that could provide some insight. Thanks |
http://forums.matronics.com[/url] - List Contribution Web generous nbsp; --> http://www.matronics.com/c=[/b] [/quote]
[quote][b]
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dsavarese0812(at)bellsout
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| Posted: Fri May 16, 2014 9:39 am Post subject: JPI Fuel flow gage install |
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Excellent point.
Dennis
Sent from my iPhone
On May 16, 2014, at 11:25 AM, "DaBear" <dabear(at)damned.org (dabear(at)damned.org)> wrote:
[quote] <![endif]--> <![endif]-->
Also best (besides level) is that there are a couple of inches of straight hose/tube before and after the transducer so that you are getting consistent flow (no strange flow from corners).
Bear
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of A. Dennis Savarese
Sent: Friday, May 16, 2014 10:31 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: JPI Fuel flow gage install
Greg,
The best place to install the JPI is between the fuel pump and the carburetor fuel inlet. I have seen them installed before the fuel pump on the CJ, between the fuel filter and the fuel pump. The reason folks install it there is because it is easier to install it there than on the output side of the fuel pump.
There is a way to fit the JPI transducer into the line between the output of the fuel pump and the carburetor by fabricating two hose sections. You can make up the hoses using the appropriate size Aeroquip 303 hose (as close as possible to the size of the metric hose) and AN491-x fittings. All available from Aircraft Spruce. The "x" is the same size as the hose size. For example, if you are using 303-6 hose, then you need an AN491-6 fitting. The B-nut on the 491-x fitting is loose in the fitting kit. You can discard it and replace it with the metric nut which you must remove from the old hose. Fabricate the ends that must re-connect to the fuel pump and the carburetor inlet on each hose section. Remember, you are going to connect the fuel transducer in between the two hose sections you are fabricating.
Next, using standard AN491-x fittings on the ends of the hose that must connect to the JPI, fit the two standard AN491-x fittings (you're going to use the AN B-nuts) to the two sections of hoses which have the metric B-nuts on the other ends. On the JPI transducer, which I believe requires 1/4" NPT male fittings, find the appropriate size AN flare (match the flare size to the standard AN491-x fitting on the hose ) to 1/4" NPT fitting.
I believe the installation instructions for the transducer says it should be installed as close to horizontal (parallel to the ground) as possible. So build the hoses to accommodate the installation requirement which means the two sections of hose that you will fabricate will be much longer than the one piece hose you remove from the fuel pump to the carburetor.
Hope this helps.
Dennis
| Quote: | | A. Dennis Savarese334-285-6263334-546-8182 (mobile)www.yak-52.comSkype - Yakguy1 |
On 5/15/2014 8:29 PM, Greg Wrobel wrote:
| Quote: |
Has anyone installed the JPI Fuel Flow Gage on a CJ6? I would think it would go between the fuel pump and carburetor but that gets a littler crazy trying to go from the CJ fittings to the standard pipe thread on the JPI. Another thought is to come from the fuel filter as I was told that unit uses the pipe thread. Any thoughts, pictures, parts lists or someone who has installed this system that could provide some insight. Thanks |
http://forums.matronics.com - List Contribution Web generous nbsp; --> http://www.matronics.com/c=
0
[b]
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keithmckinley
Joined: 11 Aug 2008
Posts: 434
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| Posted: Mon May 19, 2014 10:15 pm Post subject: Re: JPI Fuel flow gage install |
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For what it's worth; my sending unit is a floscan which is sent to an MGL FF-1 http://www.mglavionics.com/html/infinity_singles.html It is plumbed level between the fuel filter and fuel pump. I've had it for 3 years and it is dead on accurate in any phase of flight. It is one of the best mods on my CJ. The air/oil separator and auto spark plug conversion (Dennis) being the other two. The K factor adjustment took a bit of tweaking...
Keith
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