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dsavarese(at)elmore.rr.co
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 Posted: Thu May 22, 2008 6:14 am Post subject: Ordering a JPI FS-450 fuel flow instrument |
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FWIW,
After many hours of "discussion" with the folks at JPI concerning a minor
problem I was having with my FS-450, they have recommended using the FS-450G
vs the standard FS-450. The "G" model uses a model 231 Floscan transducer
which has a larger inlet opening than the standard 201B transducer. Thus a
lower back pressure on the system.
Most of us who ordered the FS-450 from JPI's dealers received the standard
unit with the 201B transducer, including me. I discussed this with the folks
at JPI. BTW, they know the specifications for our engines with regard to
fuel flow and fuel pressure, horsepower etc. One of JPI's engineers said I
should be using a 231 transducer which has a lower back pressure and the
same fuel flow capacity as the 201B transducer. I have since installed a
231 transducer but found no difference is max fuel flow as with the 201B
transducer. (I still believe I have a flakey 201B transducer). However, on
May 11 and because of my bantering back and forth with JPI, they have posted
on their General Fuel Flow FAQ's a statement which is quite obvious where it
came from; on 300-360 HP 9 cylinder radial engines (amazing how they mention
360HP) use the 231 transducer.
http://www.jpitech.com/showfaq.php4?id=354 The 231 transducer comes with
the FS-450G.
When ordering an FS-450 from any of their dealers, order the FS-450G even
though is says "for gravity feed systems". It's really not any different
than the standard model except for the transducer model and the 231
transducer has a much lower backpressure than the 201B. If ordering one of
JPI's other instruments that will include fuel flow, be sure to also specify
the model 231 transducer, their part number 700900-2.
Dennis
A. Dennis Savarese
334-285-2141
334-546-8182 (cell)
Skype: yakworld1
www.yak-52.com
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tjyak50
Joined: 31 May 2007
Posts: 81
Location: Phoenix, AZ
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| Posted: Fri May 23, 2008 6:46 am Post subject: Re: Ordering a JPI FS-450 fuel flow instrument |
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Dennis:
JPI has had a note about the M14 and the 231 transducer on their website for a few years actually. It is just hard to find.
The 231 transducer is the required transducer no matter what any retailer tells you.
I have been running this transducer and fuel flow unit in my 50 for 3 years and it is a fantastic unit.
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dsavarese(at)elmore.rr.co
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| Posted: Fri May 23, 2008 10:47 am Post subject: Ordering a JPI FS-450 fuel flow instrument |
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You're right about finding anything on the JPI web site. Thanks for the
feedback though. Quite frankly, I have seen absolutely no difference in
fuel flow whatsoever with the 201B vs. 231.
Dennis
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viperdoc(at)mindspring.co
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| Posted: Sat May 24, 2008 6:20 am Post subject: Ordering a JPI FS-450 fuel flow instrument |
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I'm running the other transducer (for get the #) and so far it has been dead
nuts on!
Doc
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dsavarese(at)elmore.rr.co
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| Posted: Sat May 24, 2008 7:00 am Post subject: Ordering a JPI FS-450 fuel flow instrument |
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Yours is the 201B transducer Doc, which is the same one that I had before
JPI said I should have the 231. As I said, there was no difference
whatsoever in fuel flow. Particularly at WOT.
Dennis
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